4-30 REAR AXLE - Continued
Visually inspect axle assembly for damage and oil leaks paying particular attention to power divider input
and output shaft seal areas.
Inspect attached components such as brake drums, spring brake chambers, and breather hose
components. Replace components showing signs of excessive wear or damage.
Connect vent line to axle, if required.
Remove vent plug from differential lock unit and replace with 1/4 in. setscrew on a new axle. Apply
threadlock liquid (item 11, Appendix E) to setscrew.
Support axle with trolley jack on differential housing and maneuver the axle under the truck.
Lift axle and aline with springs.
Apply threadlock liquid (item 29, Appendix E) to nuts (7).
Install U-bolts (9) through spring plate (8), and secure with nuts (9). Be sure axle and springs are
properly alined. Be sure spring plate scribe marks are alined. Three U-bolts are 15 in. long and one is
15 1/2 in. long. Three longer U-bolt fits inboard of the right hand spring.
Tighten nuts (7) to 300 ft lb (410 Nm).
Install air lines (1 and 2) to rear axle air shift units. Coat threads with pipe sealant (item 22, Appendix E).
Install air lines (4 and 5) to spring brake chambers (6) on both sides of truck. Coat threads with pipe
sealant (item 22, Appendix E).
Using capscrew, install axle breather (3) to frame.