A Rail King RK 320 trackmobile prepares to move a locomotive at the transfer table outside the Union Pacific locomotive shop at South Morrill, Nebraska, on September 14, 2017.

Using the overhead crane, two machinists begin the careful lift of the old prime mover of Union Pacific GE AC4400CW No. 6704 at UP’s South Morrill Locomotive Facility on September 14, 2017. Unfo... (more)

Dawn is breaking and the rising sun makes a brief appearance through some cracks in the clouds on the morning of September 15, 2017. A large gathering of Union Pacific GE locomotives await servici... (more)

It takes some dexterity and flexibility to install a new water pump inside Union Pacific GE AC4400CW No. 6227 inside the locomotive shop South Morrill, Nebraska, on September 15, 2017. Due of the ... (more)

A Rail King RK 320 trackmobile switches Union Pacific GE AC4400CW-CTE No. 5916 on Track 2 into the UP locomotive shop at South Morrill, Nebraska, on September 14, 2017.

Union Pacific GE AC4400CW No. 6300 is on Track 7 inside the railroad’s South Morrill Locomotive Facility in Nebraska to change out a bad order traction motor on September 14, 2017.

On September 14, 2017, Union Pacific GE AC4400CW locomotives are repaired and overhauled at the South Morrill Locomotive Facility. On track 2, UP AC4400CW No. 6704 is having a new prime mover is i... (more)

Machinist Hector M. Ramirez carefully checks his progress while operating the Simmons wheel lathe truing the wheels of Union Pacific GE ES44AC No. 8260 in the railroad’s locomotive shop at South... (more)

Union Pacific GE AC4400CW No. 6778 is having PTC electrical work done on Track 5, while over on Track 4, UP GE AC4400CW No. 6704 is in for an overhaul and getting a new prime mover installed, at r... (more)

Used and refurbished traction motors line the floor, waiting to be installed in a General Electric locomotive or sent out for a rebuild, at Union Pacific’s South Morrill Locomotive Facility on S... (more)

Two employees of Union Pacific’s South Morrill Locomotive Facility replace a water pump on UP GE AC4400CW No. 6227 inside the shop on September 15, 2017. Due of the substantial decline in coal t... (more)

On September 14, 2017, a new prime mover is being prepared for installation in Union Pacific GE AC4400CW No. 6704 during an overhaul at railroad’s South Morrill Locomotive Facility. The old gene... (more)

Various Union Pacific GE AC4400CWs sit outside of the railroad’s South Morrill Locomotive Facility in Nebraska on the afternoon of September 15, 2017. A transfer table is used on the east side o... (more)

A new General Electric 7FDL16 prime mover is slowly moved out of the storage area on the shop floor via overhead crane, and will be brought over to Union Pacific GE AC4400CW No. 6704 that is on Tr... (more)

Union Pacific GE AC4400CW No. 6704 is in the shop at South Morrill, Nebraska, for a engine change on September 15, 2017. The day before, a new prime mover was lowered onto the frame by the capable... (more)