This task covers:
Tool kit SC 4940-97-CL-E12
Wheel turning machine 3416-00-X84-2519
Model 2012, Type A
DC welder 3431-00-276-0397
Before wheel turning and recontouring are performed, wheel rim thickness and flange thickness must be
measured to determine if the results will meet Association of American Railroad (AAR) Rule 41
Refer to TM 55-2210-223-12 for inspection procedures. Inspect wheels for wear, sharp flanges, shelling, cracks,
and flat spots. Use a steel fish tape and measure wheels. Maximum variance of wheel circumference between
wheels on same axle is two tapes (1/4 inch (6.4 mm)). Maximum variance of wheel diameter is 0.080 inch (2 mm).
Wheel size between different axles can vary up to 3/4 inch (19.1 mm) in diameter. Defects greater than those
outlined above will require replacement of wheel sets on truck assembly.
When machining wheels of locomotive, be careful of hot, sharp chips. Wear adequate eye protection.
Use leather welding gloves. Cover exposed skin areas. Do not use hand to remove shavings, even with
leather gloves. Use a hook or welding rod.
Use a wheel turning machine and turn wheel as follows:
a. Refer to paragraph 3-61 and remove vertical brake lever with brake assembly.
Lift must be accomplished with a 20-ton (18.1 metric tons) (minimum) jack.
To be certain that axle is raised by pedestal assembly, two blocks approximately 3-1/2 inches (88.9 mm)
high must be used on each wheel.
b. Install two blocks between bearing and pedestal binder on each side.