Table 4-1. Unit Preventive Maintenance Checks and Service
Q - Quarterly
Inspect mechanism for cracks, sheared or
worn pins, and missing parts. Check for a
height of between 32.5 and 34.5 inches
(825.5 and 876.3 mm) from top of the rails
to center line of the knuckle. Use a wear
limit gauge and check coupler knuckle for
wear to determine serviceability.
Inspect pedestal liners for cracks,
wear, and damage.
Inspect side bearing for 1/2-inch
Inspect axle lateral for 1/8-inch
Inspect truck frame springs for cracks
Inspect truck frame and bolster for
Inspect foundation brake lever pins,
bushings, and clevises for wear and damage.
Inspect brakeshoes for damage and excessive
wear (minimum 3/4 inch).
Inspect brake cylinder for wear and damage.
Check for piston travel of from 3 to 6
inches (76.2 to 152.2 mm).
Inspect air reservoirs for cracks, breaks,
Inspect traction motor mounts for
Check for proper clearance on nose
Remove felt wicks, wash in flushing oil,
scrape glazing, and install.
Check oil level. Refer to LO 55-2210-