TM 9-2320-260-20
Table 2-1. Unit Level Preventive Maintenance Checks and Services (Contd)
NOT FULLY
ITEM TO
MISSION
PROCEDURE
INTERVAL
ITEM
CHECK/
N0.
CAPABLE IF:
SERVICE
Any class III leak.
e. Inspect differential seals for leaks. Notify your
Rear axles
Semi-
38
and differ- supervisor if leaking
annual
entials
f. Ensure that differential fill plug (3) and drain plug
(Contd)
(4) are not leaking and are tight. Tighten if loose. Replace
if leaking.
g. Change gear lubricant only when required by
maintenance repair action or if contaminated by water
or other foreign material. Drain only after operation
when hot. Place vehicle in level position. Remove drain
plug (4) and filler plug (3) from axle housing (1), and after
draining reinstall drain plug (4). Fill axle housing (1)
within 1/2 in. (12.7 mm) of filler plug (3) opening with
GO lubricant if lubricant is cold, or to filler plug level
if hot. Fill other gearcases to plug openings at all times
and install filler plug (3). Clean breather valve (2) after
operation in mud and water.
2-29
