
NASA's upgraded crawler-transporter 2 (CT-2), carrying mobile launcher platform 1, moves slowly along the crawlerway toward the Vehicle Assembly Building at the agency's Kennedy Space Center in Florida. The crawler's upgrades and modifications were monitored and tested during a loaded test to the crawlerway Pad A/B split. CT-2 will return to the crawler yard. The crawler is being tested to confirm it is ready to support the load of the mobile launcher carrying the Space Launch System with Orion atop for the first test flight, Exploration Mission 1. The Ground Systems Development and Operations Program at Kennedy is managing upgrades to the crawler.

NASA's upgraded crawler-transporter 2 (CT-2), carrying mobile launcher platform 1, moves slowly along the crawlerway toward the Vehicle Assembly Building at the agency's Kennedy Space Center in Florida. The crawler's upgrades and modifications were monitored and tested during a loaded test to the crawlerway Pad A/B split. CT-2 will return to the crawler yard. The crawler is being tested to confirm it is ready to support the load of the mobile launcher carrying the Space Launch System with Orion atop for the first test flight, Exploration Mission 1. The Ground Systems Development and Operations Program at Kennedy is managing upgrades to the crawler.

Crawler-transport 2 (CT-2) moves slowly along the crawlerway on its way back to the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The crawler took a trip to the pad A/B split to test upgrades recently completed that will allow the giant vehicle to handle the load of the agency's Space Launch System rocket and Orion spacecraft atop the mobile launcher. The Ground Systems Development and Operations Program oversaw upgrades to the 50-year-old CT-2. New generators, gear assemblies, jacking, equalizing and leveling (JEL) hydraulic cylinders, roller bearings and brakes were installed, and other components were upgraded to prepare for Exploration Mission 1.

Crawler-transporter 2 (CT-2) moves slowly along the crawlerway toward the Vehicle Assembly Building (in the background) at NASA's Kennedy Space Center in Florida. The crawler took a trip to the Pad A/B split to test upgrades recently completed that will allow the giant vehicle to handle the load of the agency's Space Launch System rocket and Orion spacecraft atop the mobile launcher. The Ground Systems Development and Operations Program oversaw upgrades to the 50-year-old CT-2. New generators, gear assemblies, jacking, equalizing and leveling (JEL) hydraulic cylinders, roller bearings and brakes were installed, and other components were upgraded to prepare for Exploration Mission 1.

A full view of crawler-transporter 2 (CT-2) as it moves slowly along the crawlerway on its way back to the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The crawler took a trip to the Pad A/B split to test upgrades recently completed that will allow the giant vehicle to handle the load of the agency's Space Launch System rocket and Orion spacecraft atop the mobile launcher. The Ground Systems Development and Operations Program oversaw upgrades to the 50-year-old CT-2. New generators, gear assemblies, jacking, equalizing and leveling (JEL) hydraulic cylinders, roller bearings and brakes were installed, and other components were upgraded to prepare for Exploration Mission 1.

Crawler-transporter 2 (CT-2) moves slowly along the crawlerway on its way back to the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The crawler took a trip to the Pad A/B split to test upgrades recently completed that will allow the giant vehicle to handle the load of the agency's Space Launch System rocket and Orion spacecraft atop the mobile launcher. The Ground Systems Development and Operations Program oversaw upgrades to the 50-year-old CT-2. New generators, gear assemblies, jacking, equalizing and leveling (JEL) hydraulic cylinders, roller bearings and brakes were installed, and other components were upgraded to prepare for Exploration Mission 1.

Crawler-transporter 2 (CT-2) moves slowly along the crawlerway on its way back to the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The crawler took a trip to the Pad A/B split to test upgrades recently completed that will allow the giant vehicle to handle the load of the agency's Space Launch System rocket and Orion spacecraft atop the mobile launcher. The Ground Systems Development and Operations Program oversaw upgrades to the 50-year-old CT-2. New generators, gear assemblies, jacking, equalizing and leveling (JEL) hydraulic cylinders, roller bearings and brakes were installed, and other components were upgraded to prepare for Exploration Mission 1.

Ground support technicians check out the treads on crawler-transporter 2 (CT-2) as the vehicle moves slowly along the crawlerway toward the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The crawler took a trip to the Pad A/B split to test upgrades recently completed that will allow the giant vehicle to handle the load of the agency's Space Launch System rocket and Orion spacecraft atop the mobile launcher. The Ground Systems Development and Operations Program oversaw upgrades to the 50-year-old CT-2. New generators, gear assemblies, jacking, equalizing and leveling (JEL) hydraulic cylinders, roller bearings and brakes were installed, and other components were upgraded to prepare for Exploration Mission 1.

A ground support technician checks the giant treads on crawler-transporter 2 (CT-2) as the vehicle moves slowly along the crawlerway toward the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The crawler took a trip to the pad A/B split to test upgrades recently completed that will allow the giant vehicle to handle the load of the agency's Space Launch System rocket and Orion spacecraft atop the mobile launcher. The Ground Systems Development and Operations Program oversaw upgrades to the 50-year-old CT-2. New generators, gear assemblies, jacking, equalizing and leveling (JEL) hydraulic cylinders, roller bearings and brakes were installed, and other components were upgraded to prepare for Exploration Mission 1.

Brad Lawarre, a crawler engineer and driver on the Test and Operations Support Contract, monitors the progress from one of the crawler-transporter 2 (CT-2) cabs as the vehicle moves slowly along the crawlerway toward the Vehicle Assembly Building at NASA's Kennedy Space Center Florida. The crawler took a trip to the Pad A/B split to test upgrades recently completed that will allow the giant vehicle to handle the load of the agency's Space Launch System rocket and Orion spacecraft atop the mobile launcher. The Ground Systems Development and Operations Program oversaw upgrades to the 50-year-old CT-2. New generators, gear assemblies, jacking, equalizing and leveling (JEL) hydraulic cylinders, roller bearings and brakes were installed, and other components were upgraded to prepare for Exploration Mission 1.

A ground support technician checks the new hydraulic cylinders on crawler-transporter 2 (CT-2) as the vehicle moves slowly along the crawlerway toward the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The crawler took a trip to the Pad A/B split to test upgrades recently completed that will allow the giant vehicle to handle the load of the agency's Space Launch System rocket and Orion spacecraft atop the mobile launcher. The Ground Systems Development and Operations Program oversaw upgrades to the 50-year-old CT-2. New generators, gear assemblies, jacking, equalizing and leveling (JEL) hydraulic cylinders, roller bearings and brakes were installed, and other components were upgraded to prepare for Exploration Mission 1.

Crawler-transporter 2 (CT-2) moves slowly along the crawlerway on its way back to the Vehicle Assembly Building (in view in the background) at NASA's Kennedy Space Center in Florida. Water sprayed by a truck in front to reduce dust creates a small rainbow. The crawler took a trip to the Pad A/B split to test upgrades recently completed that will allow the giant vehicle to handle the load of the agency's Space Launch System rocket and Orion spacecraft atop the mobile launcher. The Ground Systems Development and Operations Program oversaw upgrades to the 50-year-old CT-2. New generators, gear assemblies, jacking, equalizing and leveling (JEL) hydraulic cylinders, roller bearings and brakes were installed, and other components were upgraded to prepare for Exploration Mission 1.

Ground support technicians walks alongside crawler-transporter 2 (CT-2) as the vehicle moves slowly along the crawlerway toward the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The crawler took a trip to the Pad A/B split to test upgrades recently completed that will allow the giant vehicle to handle the load of the agency's Space Launch System rocket and Orion spacecraft atop the mobile launcher. The Ground Systems Development and Operations Program oversaw upgrades to the 50-year-old CT-2. New generators, gear assemblies, jacking, equalizing and leveling (JEL) hydraulic cylinders, roller bearings and brakes were installed, and other components were upgraded to prepare for Exploration Mission 1.

A ground support technician walks alongside crawler-transporter 2 (CT-2) as the vehicle moves slowly along the crawlerway toward the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The crawler took a trip to the Pad A/B split to test upgrades recently completed that will allow the giant vehicle to handle the load of the agency's Space Launch System rocket and Orion spacecraft atop the mobile launcher. The Ground Systems Development and Operations Program oversaw upgrades to the 50-year-old CT-2. New generators, gear assemblies, jacking, equalizing and leveling (JEL) hydraulic cylinders, roller bearings and brakes were installed, and other components were upgraded to prepare for Exploration Mission 1.

A ground support technician walks alongside crawler-transporter 2 (CT-2) as the vehicle moves slowly along the crawlerway toward the Vehicle Assembly Building at NASA's Kennedy Space Center in Florida. The crawler took a trip to the Pad A/B split to test upgrades recently completed that will allow the giant vehicle to handle the load of the agency's Space Launch System rocket and Orion spacecraft atop the mobile launcher. The Ground Systems Development and Operations Program oversaw upgrades to the 50-year-old CT-2. New generators, gear assemblies, jacking, equalizing and leveling (JEL) hydraulic cylinders, roller bearings and brakes were installed, and other components were upgraded to prepare for Exploration Mission 1.

KENNEDY SPACE CENTER, FLA. - A worker watches as the giant-sized gear (left side) and sprocket (right side) is moved. It will be installed on a Crawler-Tranporter (CT). The drive sprocket turns the belt on the CT. The sprocket is mated to the gear that attaches to the drive motor. The CT travels on eight tracked tread belts, each containing 57 tread belt shoes, for a combined weight of 957,600 pounds. The CT carries the Space Shuttle atop its Mobile Launcher Platform, adding another 12 million pounds, from the Vehicle Assembly Building to the launch pad. NASA and United Space Alliance (USA) CT system engineers and USA technicians are repairing the sprockets and rollers on each belt before new shoes are installed. Replacement of the sprockets, gears and shoes is part of the most extensive maintenance work performed on the CT in its history.

KENNEDY SPACE CENTER, FLA. - Workers move the hub toward the gear, where it will be attached, on the Crawler-Transporter. The drive sprocket turns the belt on the CT. The sprocket is mated to the gear that attaches to the drive motor. The CT travels on eight tracked tread belts, each containing 57 tread belt shoes, for a combined weight of 957,600 pounds. The CT carries the Space Shuttle atop its Mobile Launcher Platform, adding another 12 million pounds, from the Vehicle Assembly Building to the launch pad. NASA and United Space Alliance (USA) CT system engineers and USA technicians are repairing the sprockets and rollers on each belt before new shoes are installed. Replacement of the sprockets, gears and shoes is part of the most extensive maintenance work performed on the CT in its history.

KENNEDY SPACE CENTER, FLA. - Workers get ready to install the giant-sized sprocket (left side) and gear (right side) on the Crawler-Transporter behind it.The drive sprocket turns the belt on the CT. The sprocket is mated to the gear that attaches to the drive motor. The CT travels on eight tracked tread belts, each containing 57 tread belt shoes, for a combined weight of 957,600 pounds. The CT carries the Space Shuttle atop its Mobile Launcher Platform, adding another 12 million pounds, from the Vehicle Assembly Building to the launch pad. NASA and United Space Alliance (USA) CT system engineers and USA technicians are repairing the sprockets and rollers on each belt before new shoes are installed. Replacement of the sprockets, gears and shoes is part of the most extensive maintenance work performed on the CT in its history.

KENNEDY SPACE CENTER, FLA. - A worker maneuvers the gear into position on the Crawler-Transporter. At far left is the giant-sized sprocket. The drive sprocket turns the belt on the CT. The sprocket is mated to the gear that attaches to the drive motor. The CT travels on eight tracked tread belts, each containing 57 tread belt shoes, for a combined weight of 957,600 pounds. The CT carries the Space Shuttle atop its Mobile Launcher Platform, adding another 12 million pounds, from the Vehicle Assembly Building to the launch pad. NASA and United Space Alliance (USA) CT system engineers and USA technicians are repairing the sprockets and rollers on each belt before new shoes are installed. Replacement of the sprockets, gears and shoes is part of the most extensive maintenance work performed on the CT in its history.

KENNEDY SPACE CENTER, FLA. - Workers maneuver the giant sprocket (left) and attached gear (right) into position on the Crawler-Transporter. The drive sprocket turns the belt on the CT. The sprocket is mated to the gear that attaches to the drive motor. The CT travels on eight tracked tread belts, each containing 57 tread belt shoes, for a combined weight of 957,600 pounds. The CT carries the Space Shuttle atop its Mobile Launcher Platform, adding another 12 million pounds, from the Vehicle Assembly Building to the launch pad. NASA and United Space Alliance (USA) CT system engineers and USA technicians are repairing the sprockets and rollers on each belt before new shoes are installed. Replacement of the sprockets, gears and shoes is part of the most extensive maintenance work performed on the CT in its history.

KENNEDY SPACE CENTER, FLA. - A worker greases the giant sprocket that will be installed on the Crawler-Transporter (background). The drive sprocket turns the belt on the CT. The sprocket is mated to the gear that attaches to the drive motor. The CT travels on eight tracked tread belts, each containing 57 tread belt shoes, for a combined weight of 957,600 pounds. The CT carries the Space Shuttle atop its Mobile Launcher Platform, adding another 12 million pounds, from the Vehicle Assembly Building to the launch pad. NASA and United Space Alliance (USA) CT system engineers and USA technicians are repairing the sprockets and rollers on each belt before new shoes are installed. Replacement of the sprockets, gears and shoes is part of the most extensive maintenance work performed on the CT in its history.

KENNEDY SPACE CENTER, FLA. - Workers get ready to install the giant-sized sprocket (left side) and gear (right side) on the Crawler-Transporter at left. The drive sprocket turns the belt on the CT. The sprocket is mated to the gear that attaches to the drive motor. The CT travels on eight tracked tread belts, each containing 57 tread belt shoes, for a combined weight of 957,600 pounds. The CT carries the Space Shuttle atop its Mobile Launcher Platform, adding another 12 million pounds, from the Vehicle Assembly Building to the launch pad. NASA and United Space Alliance (USA) CT system engineers and USA technicians are repairing the sprockets and rollers on each belt before new shoes are installed. Replacement of the sprockets, gears and shoes is part of the most extensive maintenance work performed on the CT in its history.

KENNEDY SPACE CENTER, FLA. - Workers maneuver the giant-sized sprocket (left side) and gear (right side) for installation on the Crawler-Transporter behind it. The drive sprocket turns the belt on the CT. The sprocket is mated to the gear that attaches to the drive motor. The CT travels on eight tracked tread belts, each containing 57 tread belt shoes, for a combined weight of 957,600 pounds. The CT carries the Space Shuttle atop its Mobile Launcher Platform, adding another 12 million pounds, from the Vehicle Assembly Building to the launch pad. NASA and United Space Alliance (USA) CT system engineers and USA technicians are repairing the sprockets and rollers on each belt before new shoes are installed. Replacement of the sprockets, gears and shoes is part of the most extensive maintenance work performed on the CT in its history.

KENNEDY SPACE CENTER, FLA. - The giant-sized sprocket (left) and gear (right) is moved toward the Crawler-Transporter in the background for installation. The drive sprocket turns the belt on the CT. The sprocket is mated to the gear that attaches to the drive motor. The CT travels on eight tracked tread belts, each containing 57 tread belt shoes, for a combined weight of 957,600 pounds. The CT carries the Space Shuttle atop its Mobile Launcher Platform, adding another 12 million pounds, from the Vehicle Assembly Building to the launch pad. NASA and United Space Alliance (USA) CT system engineers and USA technicians are repairing the sprockets and rollers on each belt before new shoes are installed. Replacement of the sprockets, gears and shoes is part of the most extensive maintenance work performed on the CT in its history.

KENNEDY SPACE CENTER, FLA. - Workers attach the giant sprocket and attached gear onto the Crawler-Transporter. The drive sprocket turns the belt on the CT. The sprocket is mated to the gear that attaches to the drive motor. The CT travels on eight tracked tread belts, each containing 57 tread belt shoes, for a combined weight of 957,600 pounds. The CT carries the Space Shuttle atop its Mobile Launcher Platform, adding another 12 million pounds, from the Vehicle Assembly Building to the launch pad. NASA and United Space Alliance (USA) CT system engineers and USA technicians are repairing the sprockets and rollers on each belt before new shoes are installed. Replacement of the sprockets, gears and shoes is part of the most extensive maintenance work performed on the CT in its history.

KENNEDY SPACE CENTER, FLA. - A Kennedy Space Center technician inspects the shoes on one of eight tracks of a crawler-transporter (CT). The CT is moving Mobile Launcher Platform (MLP) number 3 with a set of twin solid rocket boosters bolted on top to the intersection in the crawlerway in support of the second engineering analysis vibration test on the crawler and MLP. The crawler is moving at various speeds up to 1 mph in an effort to achieve vibration data gathering goals as it leaves the VAB, travels toward Launch Pad 39A and then returns. The boosters are braced at the top for stability. The primary purpose of these rollout tests is to gather data to develop future maintenance requirements on the transport equipment and the flight hardware. Various parts of the MLP and crawler transporter have been instrumented with vibration data collection equipment.

This animation shows the data collected on a Mars 2020 sample tube using a computerized tomography (CT) scanner. Engineers working on the sample tubes used the 3D imagery to better understand the tubes' internal structure. About the size and shape of a standard lab test tube, the 43 sample tubes headed to Mars must be lightweight, hardy enough to survive the demands of the round trip, and so clean that future scientists will be confident that what they are analyzing is 100% Mars. Movie available at https://photojournal.jpl.nasa.gov/catalog/PIA24304

Ground support technicians walk alongside NASA's upgraded crawler-transporter 2 (CT-2), carrying mobile launcher platform 1, as it slowly travels on the crawlerway at the agency's Kennedy Space Center in Florida. The crawler's upgrades and modifications will be monitored and tested under loaded conditions during its travel to the crawlerway Pad A/B split and back to the crawler yard to confirm it is ready to support the load of the mobile launcher carrying the Space Launch System with Orion atop for the first test flight, Exploration Mission 1. The Ground Systems Development and Operations Program at Kennedy is managing upgrades to the crawler.

NASA’s upgraded crawler-transporter 2 (CT-2) travels slowly along the crawlerway carrying mobile launcher platform 1 at the agency’s Kennedy Space Center in Florida. The crawler's upgrades and modifications were being monitored and tested under loaded conditions during its travel to the Pad A/B split and back to the crawler yard to confirm it is ready to support the load of the mobile launcher carrying the Space Launch System with Orion atop for the first test flight, Exploration Mission 1. A truck sprays water in front of the crawler to control dust as the large vehicle moves along. The Ground Systems Development and Operations Program at Kennedy is managing upgrades to the crawler.

NASA's upgraded crawler-transporter 2 (CT-2) travels slowly along the crawlerway, carrying the mobile launcher platform at the agency's Kennedy Space Center in Florida. The crawler's upgrades and modifications will be monitored and tested under loaded conditions during its travel to the crawlerway Pad A/B split and back to the crawler yard to confirm it is ready to support the load of the mobile launcher carrying the Space Launch System with Orion atop for the first test flight, Exploration Mission 1. The Ground Systems Development and Operations Program at Kennedy is managing upgrades to the crawler.

During a load test of NASA's upgraded crawler-transporter 2 (CT-2), a ground support technician watches as the giant vehicle travels along the crawlerway at the agency’s Kennedy Space Center in Florida. The crawler's upgrades and modifications will be monitored and tested under loaded conditions during its travel to the crawlerway Pad A/B split and back to the crawler yard to confirm it is ready to support the load of the mobile launcher carrying the Space Launch System with Orion atop for the first test flight, Exploration Mission 1. The Ground Systems Development and Operations Program at Kennedy is managing upgrades to the crawler.

NASA's upgraded crawler-transporter 2 (CT-2), carrying mobile launcher platform 1, moves slowly along the crawlerway at the agency's Kennedy Space Center in Florida. The crawler's upgrades and modifications will be monitored and tested under loaded conditions during its travel to the crawlerway Pad A/B split and back to the crawler yard to confirm it is ready to support the load of the mobile launcher carrying the Space Launch System with Orion atop for the first test flight, Exploration Mission 1. The Ground Systems Development and Operations Program at Kennedy is managing upgrades to the crawler.

NASA's upgraded crawler-transporter 2 (CT-2), carrying mobile launcher platform 1, moves slowly along the crawlerway at the agency's Kennedy Space Center in Florida. The crawler's upgrades and modifications will be monitored and tested under loaded conditions during its travel to the crawlerway Pad A/B split and back to the crawler yard to confirm it is ready to support the load of the mobile launcher carrying the Space Launch System with Orion atop for the first test flight, Exploration Mission 1. The Ground Systems Development and Operations Program at Kennedy is managing upgrades to the crawler.

NASA's upgraded crawler-transporter 2 (CT-2) picks up mobile launcher platform 1 (MLP1) at the MLP park site near the Vehicle Assembly at the agency's Kennedy Space Center in Florida. The crawler's upgrades and modifications will be monitored and tested under loaded conditions during its travel to the crawlerway Pad A/B split and back to the crawler yard to confirm it is ready to support the load of the mobile launcher carrying the Space Launch System with Orion atop for the first test flight, Exploration Mission 1. The Ground Systems Development and Operations Program at Kennedy is managing upgrades to the crawler.

CAPE CANAVERAL, Fla. – In front of the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a technician uses a forklift to move a fuel tank after it was removed from crawler-transporter 1 CT-1 in high bay 3. The fuel tank will be transporter to the Wiltech facility at Kennedy for cleaning and inspection. Work continues in high bay 3 to upgrade CT-1 as part of its general maintenance. CT-1 could be available to carry commercial launch vehicles to the launch pad. The crawler-transporters were used to carry the mobile launcher platform and space shuttle to Launch Complex 39 for space shuttle launches for 30 years. Photo credit: NASA_Jim Grossman

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, technicians prepare to remove a fuel tank from crawler-transporter 1 CT-1 in high bay 3. The fuel tank will be transported to the Wiltech facility at Kennedy for cleaning and inspection. Work continues in high bay 3 to upgrade CT-1 as part of its general maintenance. CT-1 could be available to carry commercial launch vehicles to the launch pad. The crawler-transporters were used to carry the mobile launcher platform and space shuttle to Launch Complex 39 for space shuttle launches for 30 years. Photo credit: NASA_Jim Grossman

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a large crane is used to lift a fuel tank away from crawler-transporter 1 CT-1 in high bay 3. The fuel tank will be transported to the Wiltech facility at Kennedy for cleaning and inspection. Work continues in high bay 3 to upgrade CT-1 as part of its general maintenance. CT-1 could be available to carry commercial launch vehicles to the launch pad. The crawler-transporters were used to carry the mobile launcher platform and space shuttle to Launch Complex 39 for space shuttle launches for 30 years. Photo credit: NASA_Jim Grossman

KENNEDY SPACE CENTER, FLA. -Crawler-transporter (CT) number 2, moves away from the Vehicle Assembly Building, with a Mobile Launcher Platform on top, on a test run to the launch pad. The CT recently underwent modifications to the cab. The CT moves Space Shuttle vehicles between the VAB and launch pad. Moving on four double-tracked crawlers, the CT uses a laser guidance system and a leveling system for the journey that keeps the top of a Space Shuttle vertical within plus- or minus-10 minutes of arc. The system enables the CT-MLP-Shuttle to negotiate the ramp leading to the launch pads and keep the load level. Unloaded, the CT weighs 6 million pounds.

NASA’s upgraded crawler-transporter 2 (CT-2) returns to the Vehicle Assembly Building (VAB) from its trek to Launch Pad 39B at the agency’s Kennedy Space Center in Florida. CT-2 was driven along the crawlerway and onto Pad 39B to test recently completed upgrades and modifications for NASA’s journey to Mars. The Ground Systems Development and Operations Program at Kennedy oversaw upgrades to the crawler in the VAB. The crawler will carry the mobile launcher with Orion atop the Space Launch System rocket to Pad 39B for Exploration Mission 1.

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, technicians prepare to install a new generator in crawler-transporter 1, or CT-1. Work continues in high bay 3 to upgrade CT-1 as part of its general maintenance. CT-1 could be available to carry commercial launch vehicles to the launch pad. The crawler-transporters were used to carry the mobile launcher platform and space shuttle to Launch Complex 39 for space shuttle launches for 30 years. Photo credit: NASA_Daniel Casper

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a large crane is used to lift a new generator for installation in crawler-transporter 1, or CT-1. Work continues in high bay 3 to upgrade CT-1 as part of its general maintenance. CT-1 could be available to carry commercial launch vehicles to the launch pad. The crawler-transporters were used to carry the mobile launcher platform and space shuttle to Launch Complex 39 for space shuttle launches for 30 years. Photo credit: NASA_Daniel Casper

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a technician inspects a new generator for installation in crawler-transporter 1, or CT-1. Work continues in high bay 3 to upgrade CT-1 as part of its general maintenance. CT-1 could be available to carry commercial launch vehicles to the launch pad. The crawler-transporters were used to carry the mobile launcher platform and space shuttle to Launch Complex 39 for space shuttle launches for 30 years. Photo credit: NASA_Daniel Casper

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, technicians monitor the progress as a large crane lowers a new generator up for installation in crawler-transporter 1, or CT-1. Work continues in high bay 3 to upgrade CT-1 as part of its general maintenance. CT-1 could be available to carry commercial launch vehicles to the launch pad. The crawler-transporters were used to carry the mobile launcher platform and space shuttle to Launch Complex 39 for space shuttle launches for 30 years. Photo credit: NASA_Daniel Casper

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a large crane lifts a new generator up for installation in crawler-transporter 1, or CT-1. Work continues in high bay 3 to upgrade CT-1 as part of its general maintenance. CT-1 could be available to carry commercial launch vehicles to the launch pad. The crawler-transporters were used to carry the mobile launcher platform and space shuttle to Launch Complex 39 for space shuttle launches for 30 years. Photo credit: NASA_Daniel Casper

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, technicians prepare a new generator for installation in crawler-transporter 1, or CT-1. Work continues in high bay 3 to upgrade CT-1 as part of its general maintenance. CT-1 could be available to carry commercial launch vehicles to the launch pad. The crawler-transporters were used to carry the mobile launcher platform and space shuttle to Launch Complex 39 for space shuttle launches for 30 years. Photo credit: NASA_Daniel Casper

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a forklift is used to move a new generator closer for installation in crawler-transporter 1, or CT-1. Work continues in high bay 3 to upgrade CT-1 as part of its general maintenance. CT-1 could be available to carry commercial launch vehicles to the launch pad. The crawler-transporters were used to carry the mobile launcher platform and space shuttle to Launch Complex 39 for space shuttle launches for 30 years. Photo credit: NASA_Daniel Casper

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, technicians prepare a new generator to be lifted by crane for installation in crawler-transporter 1, or CT-1. Work continues in high bay 3 to upgrade CT-1 as part of its general maintenance. CT-1 could be available to carry commercial launch vehicles to the launch pad. The crawler-transporters were used to carry the mobile launcher platform and space shuttle to Launch Complex 39 for space shuttle launches for 30 years. Photo credit: NASA_Daniel Casper

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, technicians prepare to install a new generator in crawler-transporter 1, or CT-1. Work continues in high bay 3 to upgrade CT-1 as part of its general maintenance. CT-1 could be available to carry commercial launch vehicles to the launch pad. The crawler-transporters were used to carry the mobile launcher platform and space shuttle to Launch Complex 39 for space shuttle launches for 30 years. Photo credit: NASA_Daniel Casper

A technician watches the motion of the giant tracks on NASA’s upgraded crawler-transporter 2 (CT-2) as the giant vehicle travels along the crawlerway toward the Vehicle Assembly Building from its trek to Launch Pad 39B at the agency’s Kennedy Space Center in Florida. CT-2 was drive to Pad 39B to test recently completed upgrades and modifications to support NASA’s journey to Mars. The Ground Systems Development and Operations Program at Kennedy oversaw upgrades to the crawler in the VAB. The crawler will carry the mobile launcher with Orion atop the Space Launch System rocket to Pad 39B for Exploration Mission 1.

NASA’s upgraded crawler-transporter 2 (CT-2) returns from its trek to Launch Pad 39B at the agency’s Kennedy Space Center in Florida. CT-2 traveled to Pad 39B to test recently completed upgrades and modifications to support NASA’s journey to Mars. A truck sprays water in front of the crawler to control dust as the large vehicle moves along. The Ground Systems Development and Operations Program at Kennedy oversaw upgrades to the crawler in the Vehicle Assembly Building. The crawler will carry the mobile launcher with Orion atop the Space Launch System rocket to Pad 39B for Exploration Mission 1.

A close-up view of one of the cleats on one section of the tracks that help propel NASA’s upgraded crawler-transporter 2 (CT-2) as the giant vehicle moves along the crawlerway toward the Vehicle Assembly Building (VAB) at NASA Kennedy Space Center in Florida. CT-2 was driven to Launch Pad 39B to test recently completed upgrades and modifications to ensure the vehicle will be ready to support NASA’s journey to Mars. The Ground Systems Development and Operations Program at Kennedy oversaw upgrades to the crawler in the VAB. The crawler will carry the mobile launcher with Orion atop the Space Launch System rocket to Pad 39B for Exploration Mission 1.

A technician watches the motion of the giant tracks on NASA’s upgraded crawler-transporter 2 (CT-2) as the giant vehicle travels along the crawlerway toward the Vehicle Assembly Building from its trek to Launch Pad 39B at the agency’s Kennedy Space Center in Florida. CT-2 was drive to Pad 39B to test recently completed upgrades and modifications to support NASA’s journey to Mars. The Ground Systems Development and Operations Program at Kennedy oversaw upgrades to the crawler in the VAB. The crawler will carry the mobile launcher with Orion atop the Space Launch System rocket to Pad 39B for Exploration Mission 1.

A close-up view of a section of cleats on one of the tracks that help propel NASA’s upgraded crawler-transporter 2 (CT-2) as the giant vehicle moves along the crawlerway toward the Vehicle Assembly Building (VAB) at NASA Kennedy Space Center in Florida. CT-2 was driven to Launch Pad 39B to test recently completed upgrades and modifications to ensure the vehicle will be ready to support NASA’s journey to Mars. The Ground Systems Development and Operations Program at Kennedy oversaw upgrades to the crawler in the VAB. The crawler will carry the mobile launcher with Orion atop the Space Launch System rocket to Pad 39B for Exploration Mission 1.

KENNEDY SPACE CENTER, FLA. - A closeup of crawler-transportation (CT) number 2 shows the new muffler system on the vehicle. The CT also recently underwent modifications to the cab. The CT is transporting a Mobile Launch Platform (MLP). The CT moves Space Shuttle vehicles, situated on the MLP, between the VAB and launch pad. Moving on four double-tracked crawlers, the CT uses a laser guidance system and a leveling system for the journey that keeps the top of a Space Shuttle vertical within plus- or minus-10 minutes of arc. The system enables the CT-MLP-Shuttle to negotiate the ramp leading to the launch pads and keep the load level. Unloaded, the CT weighs 6 million pounds. Seen on top of the MLP are two tail service masts that support the fluid, gas and electrical requirements of the orbiter’s liquid oxygen and liquid hydrogen aft umbilicals.

KENNEDY SPACE CENTER, FLA. - Inside the cab of crawler-transporter (CT) number 2, driver Sam Dove, with United Space Alliance, operates the vehicle on a test run to the launch pad. The CT recently underwent modifications to the cab. The CT is transporting a Mobile Launch Platform (MLP). The CT moves Space Shuttle vehicles, situated on the MLP, between the VAB and launch pad. Moving on four double-tracked crawlers, the CT uses a laser guidance system and a leveling system for the journey that keeps the top of a Space Shuttle vertical within plus- or minus-10 minutes of arc. The system enables the CT-MLP-Shuttle to negotiate the ramp leading to the launch pads and keep the load level. Unloaded, the CT weighs 6 million pounds. Seen on top of the MLP are two tail service masts that support the fluid, gas and electrical requirements of the orbiter’s liquid oxygen and liquid hydrogen aft umbilicals.

KENNEDY SPACE CENTER, FLA. - Inside the cab of crawler-transporter (CT) number 2, driver Sam Dove, with United Space Alliance, operates the vehicle on a test run to the launch pad. The CT recently underwent modifications to the cab. The CT is transporting a Mobile Launch Platform (MLP). The CT moves Space Shuttle vehicles, situated on the MLP, between the VAB and launch pad. Moving on four double-tracked crawlers, the CT uses a laser guidance system and a leveling system for the journey that keeps the top of a Space Shuttle vertical within plus- or minus-10 minutes of arc. The system enables the CT-MLP-Shuttle to negotiate the ramp leading to the launch pads and keep the load level. Unloaded, the CT weighs 6 million pounds. Seen on top of the MLP are two tail service masts that support the fluid, gas and electrical requirements of the orbiter’s liquid oxygen and liquid hydrogen aft umbilicals.

CAPE CANAVERAL, Fla. – In front of the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, technicians monitor the progress as a large crane lowers a fuel tank from crawler-transporter 1 CT-1 in high bay 3 onto a flatbed truck. The fuel tank will be transported to the Wiltech facility at Kennedy for cleaning and inspection. Work continues in high bay 3 to upgrade CT-1 as part of its general maintenance. CT-1 could be available to carry commercial launch vehicles to the launch pad. The crawler-transporters were used to carry the mobile launcher platform and space shuttle to Launch Complex 39 for space shuttle launches for 30 years. Photo credit: NASA_Jim Grossman

CAPE CANAVERAL, Fla. – In front of the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a technician uses a forklift to move a fuel tank onto a flatbed truck. Two fuel tanks were removed from crawler-transporter 1 CT-1 in high bay 3. The tanks will be sent to the Wiltech facility at Kennedy for cleaning and inspection. Work continues in high bay 3 to upgrade CT-1 as part of its general maintenance. CT-1 could be available to carry commercial launch vehicles to the launch pad. The crawler-transporters were used to carry the mobile launcher platform and space shuttle to Launch Complex 39 for space shuttle launches for 30 years. Photo credit: NASA_Jim Grossman

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians attach crane lines to the treads on the C truck of crawler-transporter 2, or CT-2, so they can be lifted up and away. The treads are being removed in order to gain access to remove the gear boxes. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a ground support technician assists with removal of a bearing from the B truck tread of crawler-transporter 2, or CT-2. New roller bearing assemblies will be installed. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians assist as a crane lifts a portion of the treads on the C truck of crawler-transporter 2, or CT-2, away from the vehicle. The treads are being removed in order to gain access to remove the gear boxes. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a ground support technician assists with removal of bearings from the B truck tread of crawler-transporter 2, or CT-2. New roller bearing assemblies will be installed. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians assist with removal of bearings from the B truck tread of crawler-transporter 2, or CT-2. New roller bearing assemblies will be installed. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a portion of the treads on the C truck of crawler-transporter 2, or CT-2, have been removed from the vehicle. The treads are being removed in order to gain access to remove the gear boxes. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians attach crane lines to the treads on the C truck of crawler-transporter 2, or CT-2, so they can be lifted up and away. The treads are being removed in order to gain access to remove the gear boxes. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians attach crane lines to the treads on the C truck of crawler-transporter 2, or CT-2, so they can be lifted up and away. The treads are being removed in order to gain access to remove the gear boxes. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – A section of the treads on the C truck of crawler-transporter 2, or CT-2, have been removed and are being stored near the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida. The treads are being removed from the crawler in order to gain access to remove the gear boxes. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

KENNEDY SPACE CENTER, FLA. - Crawler-transporter (CT) number 2, moves away from the Vehicle Assembly Building with a Mobile Launcher Platform (MLP) on top on a test run to the launch pad. The CT recently underwent modifications to the cab. The CT moves Space Shuttle vehicles, situated on the MLP, between the VAB and launch pad. Moving on four double-tracked crawlers, the CT uses a laser guidance system and a leveling system for the journey that keeps the top of a Space Shuttle vertical within plus- or minus-10 minutes of arc. The system enables the CT-MLP-Shuttle to negotiate the ramp leading to the launch pads and keep the load level. Unloaded, the CT weighs 6 million pounds. Seen on top of the MLP are two tail service masts that support the fluid, gas and electrical requirements of the orbiter’s liquid oxygen and liquid hydrogen aft umbilicals.

KENNEDY SPACE CENTER, FLA. - A closeup of crawler-transporter (CT) number 2 shows the cab, at left, that recently underwent modifications. The CT is transporting a Mobile Launch Platform (MLP) on a test run to the pad. The CT moves Space Shuttle vehicles, situated on the MLP, between the VAB and launch pad. Moving on four double-tracked crawlers, the CT uses a laser guidance system and a leveling system for the journey that keeps the top of a Space Shuttle vertical within plus- or minus-10 minutes of arc. The system enables the CT-MLP-Shuttle to negotiate the ramp leading to the launch pads and keep the load level. Unloaded, the CT weighs 6 million pounds. Seen on top of the MLP are two tail service masts that support the fluid, gas and electrical requirements of the orbiter’s liquid oxygen and liquid hydrogen aft umbilicals.

KENNEDY SPACE CENTER, FLA. - A closeup of crawler-transporter (CT) number 2 shows the cab (left, above the tracks) that recently underwent modifications. The CT is transporting a Mobile Launch Platform (MLP) on a test run to the pad. The CT moves Space Shuttle vehicles, situated on the MLP, between the VAB and launch pad. Moving on four double-tracked crawlers, the CT uses a laser guidance system and a leveling system for the journey that keeps the top of a Space Shuttle vertical within plus- or minus-10 minutes of arc. The system enables the CT-MLP-Shuttle to negotiate the ramp leading to the launch pads and keep the load level. Unloaded, the CT weighs 6 million pounds. Seen on top of the MLP are two tail service masts that support the fluid, gas and electrical requirements of the orbiter’s liquid oxygen and liquid hydrogen aft umbilicals.

KENNEDY SPACE CENTER, FLA. - Crawler-transporter (CT) number 2 nears the launch pad with a Mobile Launcher Platform (MLP) on top. After recent modifications to the cab and muffler system, the CT was taken on a test run. The CT moves Space Shuttle vehicles, situated on the MLP, between the VAB and launch pad. Moving on four double-tracked crawlers, the CT uses a laser guidance system and a leveling system for the journey that keeps the top of a Space Shuttle vertical within plus- or minus-10 minutes of arc. The system enables the CT-MLP-Shuttle to negotiate the ramp leading to the launch pads and keep the load level. Unloaded, the CT weighs 6 million pounds. Seen on top of the MLP are two tail service masts that support the fluid, gas and electrical requirements of the orbiter’s liquid oxygen and liquid hydrogen aft umbilicals.

View of CT
View of CT

View of CT

View of CT
View of ML on CT

Interior View of CT
View of ML on CT

View of ML on CT

View of ML on CT

View of ML on CT
View of ML on CT

View of CT Assembly

View of ML on CT

View of Space Shuttle and MLP on CT
View of Space Shuttle and MLP on CT

View of Space Shuttle and MLP on CT

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, the B and D truck sections of crawler-transporter 2, or CT-2, are being raised up to prepare for installation of new roller bearing assemblies. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, the B and D truck sections of crawler-transporter 2, or CT-2, are being raised up to prepare for installation of new roller bearing assemblies. Sections of the crawler’s large metal tracks have been removed. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, the B and D truck sections of crawler-transporter 2, or CT-2, are being raised up to prepare for installation of new roller bearing assemblies. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, a technician monitors the progress as the B and D truck sections of crawler-transporter 2, or CT-2, are raised up to prepare for installation of new roller bearing assemblies. Sections of the crawler’s large metal tracks have been removed. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, the B and D truck sections of crawler-transporter 2, or CT-2, have been raised up to prepare for installation of new roller bearing assemblies. Sections of the crawler’s large metal tracks have been removed. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians have attached crane lines to a portion of the treads on the C truck of crawler-transporter 2, or CT-2, so they can be lifted up and away. The treads are being removed in order to gain access to remove the gear boxes. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

CAPE CANAVERAL, Fla. – Inside the Vehicle Assembly Building at NASA’s Kennedy Space Center in Florida, ground support technicians have attached crane lines to a portion of the treads on the C truck of crawler-transporter 2, or CT-2, so they can be lifted up and away. The treads are being removed in order to gain access to remove the gear boxes. Work continues in high bay 2 to upgrade CT-2. The modifications are designed to ensure CT-2’s ability to transport launch vehicles currently in development, such as the agency’s Space Launch System, to the launch pad. The Ground Systems Development and Operations Program office at Kennedy is overseeing the upgrades. For more than 45 years the crawler-transporters were used to transport the mobile launcher platform and the Apollo-Saturn V rockets and, later, space shuttles to Launch Pads 39A and B. For more information, visit: http://www.nasa.gov/exploration/systems/ground/crawler-transporter. Photo credit: NASA/Dimitri Gerondidakis

William Vardaman, mechanical technician with the Jacobs contracting team, performs engine maintenance on NASA's crawler-transporter 2 on March 26, 2019, in the crawler yard located in Kennedy Space Center's Launch Complex 39 area. Recent engine work included rebuilding the vehicles’ fuel pump assemblies and installing new oil pumps that will help minimize future wear. This is one of two crawler-transporters that carried rockets and spacecraft, including the Apollo/Saturn V and space shuttle, from the Vehicle Assembly Building to the launch pad. NASA’s Exploration Ground Systems oversaw modifications and upgrades to crawler-transporter 2 so it can carry the mobile launcher and NASA's Space Launch System rocket, topped by the Orion spacecraft, to Launch Pad 39B for Exploration Mission-1.

Pat Brown, left, and William Vardaman, mechanical technicians with the Jacobs contracting team, perform engine maintenance on NASA's crawler-transporter 2 on March 26, 2019, in the crawler yard located in Kennedy Space Center's Launch Complex 39 area. Recent engine work included rebuilding the vehicles’ fuel pump assemblies and installing new oil pumps that will help minimize future wear. This is one of two crawler-transporters that carried rockets and spacecraft, including the Apollo/Saturn V and space shuttle, from the Vehicle Assembly Building to the launch pad. NASA’s Exploration Ground Systems oversaw modifications and upgrades to crawler-transporter 2 so it can carry the mobile launcher and NASA's Space Launch System rocket, topped by the Orion spacecraft, to Launch Pad 39B for Exploration Mission-1.

William Vardaman, a mechanical technician with the Jacobs contracting team, performs engine maintenance on NASA's crawler-transporter 2 on March 26, 2019, in the crawler yard located in Kennedy Space Center's Launch Complex 39 area. Recent engine work included rebuilding the vehicles’ fuel pump assemblies and installing new oil pumps that will help minimize future wear. This is one of two crawler-transporters that carried rockets and spacecraft, including the Apollo/Saturn V and space shuttle, from the Vehicle Assembly Building to the launch pad. NASA’s Exploration Ground Systems oversaw modifications and upgrades to crawler-transporter 2 so it can carry the mobile launcher and NASA's Space Launch System rocket, topped by the Orion spacecraft, to Launch Pad 39B for Exploration Mission-1.

William Vardaman, a mechanical technician with the Jacobs contracting team, performs engine maintenance on NASA's crawler-transporter 2 on March 26, 2019, in the crawler yard located in Kennedy Space Center's Launch Complex 39 area. Recent engine work included rebuilding the vehicles’ fuel pump assemblies and installing new oil pumps that will help minimize future wear. This is one of two crawler-transporters that carried rockets and spacecraft, including the Apollo/Saturn V and space shuttle, from the Vehicle Assembly Building to the launch pad. NASA’s Exploration Ground Systems oversaw modifications and upgrades to crawler-transporter 2 so it can carry the mobile launcher and NASA's Space Launch System rocket, topped by the Orion spacecraft, to Launch Pad 39B for Exploration Mission-1.

William Vardaman, left, and Pat Brown, mechanical technicians with the Jacobs contracting team, perform engine maintenance on NASA's crawler-transporter 2 on March 26, 2019, in the crawler yard located in Kennedy Space Center's Launch Complex 39 area. Recent engine work included rebuilding the vehicles’ fuel pump assemblies and installing new oil pumps that will help minimize future wear. This is one of two crawler-transporters that carried rockets and spacecraft, including the Apollo/Saturn V and space shuttle, from the Vehicle Assembly Building to the launch pad. NASA’s Exploration Ground Systems oversaw modifications and upgrades to crawler-transporter 2 so it can carry the mobile launcher and NASA's Space Launch System rocket, topped by the Orion spacecraft, to Launch Pad 39B for Exploration Mission-1.

Pat Brown, a mechanical technician with Jacobs, has wrenches, pliers and other tools at the ready as he performs engine maintenance on NASA's crawler-transporter 2 on March 26, 2019, in the crawler yard located in Kennedy Space Center's Launch Complex 39 area. Recent engine work included rebuilding the vehicles’ fuel pump assemblies and installing new oil pumps that will help minimize future wear. This is one of two crawler-transporters that carried rockets and spacecraft, including the Apollo/Saturn V and space shuttle, from the Vehicle Assembly Building to the launch pad. NASA’s Exploration Ground Systems oversaw modifications and upgrades to crawler-transporter 2 so it can carry the mobile launcher and NASA's Space Launch System rocket, topped by the Orion spacecraft, to Launch Pad 39B for Exploration Mission-1.