Axles No. 3 and No. 4 Maintenance Instructions (Cont)
Axle Model 480 does not have spacer washer.
Remove spacer (70) and spacer
washer (71) from pinion (66).
Remove inner bearing cone (72) and
pilot bearing (73) from pinion (66).
Remove pipe plug (74) from differential
Remove two screws (75),
lockwashers (76), and cover (77).
If differential carrier housing must be replaced, the
new housing will come as part of a kit. This kit
contains parts not required in this application. Refer
to TM 9-2320-279-24P for proper identification of
Scrape old sealant from differential carrier.
Adhesives, solvents, and sealing compounds can burn
easily, can give off harmful vapors, and are harmful to
skin and clothing. To avoid injury or death, keep away
from open fire and use in well-ventilated area. If
adhesive, solvent, or sealing compound gets on skin or
clothing, wash immediately with soap and water.
Clean all metal parts with drycleaning solvent.
Compressed air used for cleaning purposes will not
exceed 30 psi (207 kPa). Use only with effective chip
guarding and personal protective equipment, goggles,
shield, and gloves.
Use clean, lint-free cloth or compressed air to dry metal parts, except bearings. Allow bearings to
Inspect all metal parts for breaks, cracks, and sharp edges. Replace if damaged.
Inspect bearings for loose rollers or cracked or broken races. Coat bearings with oil.
Inspect dowel pins for cracks and breaks. Replace if damaged.
Inspect internally splined friction plate embossing. If embossing is completely worn off, replace
Inspect friction plates for warping, cracks, breaks, and excessive oxidation (varnish) on plates. If
friction plates are warped, cracked, broken, or oxidized, replace individual friction plates as
necessary. If more than half the friction plates are oxidized, replace entire set of friction plates.
If drive pinion or ring gear is bad, replace both as matched set.
Replace springs if there are signs of overheating, wear due to rubbing against other parts, or if
length is less than 1.34 in. (34 mm) under 200-lb (91 kg) load. If three or more springs must be
replaced, replace entire set of springs.