4-31. FRONT AND REAR SUSPENSION - Continued
This task covers
Shop Equipment, Automotive
Maintenance and Repair,
Main Engine Shutdown (see para. 2-10)
APU Shutdown (see para. 2-12)
Batteries Disconnected (see para. 4-24)
Truck Wheel Removed (see para. 4-29.1)
Shock Absorber Removed (see para. 4-31.1)
17, Appendix E Engine Oil
29, Appendix E Threadlock liquid
16, Appendix E Grease
37520 Front Spring Assembly
37521 Rear Spring Assembly
PERSONNEL REQUIRED - 2
Leaf spring weighs about 200 lb (90 kg). Use suitable equipment or assistance to avoid injury.
The front and rear springs are mounted similarly except that the rear springs are mounted
outboard of the frame and the front are mounted directly beneath the frame. The rear springs
have 15 leafs, whereas the front only have 11. Only replace one spring at a time.
For rear spring, remove hose reel cover, see para. 4-14.1. For front springs, remove front and
pump body heat shield, see para. 4-11.
(1) Ensure wheel and shock absorber on that end of the axle which is to have spring replaced are removed.
Ensure front or rear of truck (depending which spring is to be replaced) is supported on maintenance
trestles on the frame.
(2) Support axle on jack. Raise jack until it just touches the axle.
(3) Remove both suspension U-bolts by undoing nuts (10). If nuts and threads are corroded burn through U-
(4) Mark spring top plate (9) forward edge and top face. Remove spring top plate.
(5) Raise jack under axle until there is a small gap between axle and spring.