TO 40W4-15 22
2-101. SERVICE BRAKE MAINTENANCE (MODEL WPES-1).
This task consists of:
General Mechanics Tool Kit (Appendix B, Section III, Item 4)
Jack, Dolly (Appendix B, Section III, Item 3)
Trestle, Motor (Appendix B, Section III Item 3)
Trailer connected to towing vehicle (TM 10-4610-240-10).
Airbrake hoses connected to towing vehicle (TM 10-4610-240-10).
Towing vehicle compressor supplying normal brake air pressure to trailer.
There are four service breaks on the flatbed cargo trailer, two per axle. Adjustment of one service
break is shown, the others are similar. If adjustment of one is required, adjust all four service brakes.
a. Position 10 ton jacks at both ends of axle being serviced. Jack up axle evenly until wheels clear ground.
b. Install trestles at both ends of axle being serviced.
c. Position socket wrench over adjusting bolt (2) and push in against spring loaded keeper (3).
d. Turn tire and wheel assembly (1) by hand.
e. While keeping pressure against keeper (3), turn adjusting bolt (2) until brakes begin to drag.
f. Slowly back off on adjusting bolt (2) until drum stops dragging on brake.
g. Remove socket wrench from adjusting bolt (2). Make sure keeper (3) extends and alines with head of adjusting
h. Remove trestles from beneath axle.
i. Lower and remove both jacks.