Table 2-1. Unit Level Preventive Maintenance Checks and Services HMMWV (Cont'd)
ITEM
NO.
INTERVAL
ITEM TO BE
INSPECTED
PROCEDURES
30
Annually
Electrical
Inspect all wiring and wiring harness
Broken, frayed, split
Wiring
for frays, splits, missing insulation, or
wires or harness.
poor connections. Repair any worn
wiring (para. 4-85). If wiring cannot be
repaired, notify DS maintenance.
30.1
Annually
Engine
Observe engine and vehicle operation
Vehicle fails to operate
Running
for rough idle, rough running, lack
properly.
Test
of power, and unusual noise or
vibration (para. 2-18).
30.2
Annually
Transmission Perform AOAP sample.
31
Biennially Transmission
TM 9-2320-280-20-1
2-26
Change 1
NOT FULLY MISSION
CAPABLE IF:
CAUTION
Use Dexron® II or Dexron® III for
3L80 transmission. Use only Dexron®
III for 4L80-E transmission. Failure to
use only Dexron® III for 4L80E
transmission will cause damage to
transmission.
NOTE
• Change fluid every 12,000 miles
(19,300 km) or biennially, whichever
occurs first (para. 5-2a). Inspect
either 3L80 or 4L80-E transmission
drainplug for metal particles.
• Replace transmission oil filter each
time transmission is drained. Fill
3L80 transmission with 6 quarts
(5.7 L) of Dexron® II or Dexron® III.
Fill 4L80-E transmission with 7.7
quarts (7.3 L) of only Dexron® III. In
arctic conditions, use OEA in both
model transmissions.
CAUTION
Use Dexron® II or Dexron® III for
3L80 transmission. Use only
Dexron® III for 4L80-E transmission.
Failure to use only Dexron® III for
4L80E transmission will cause damage
to transmission.
NOTE
• Oil and oil filter will be changed when
they are known to be contaminated,
clogged, or when service is
recommended by AOAP laboratory.
• Replace transmission oil filter each
time transmission is drained. Fill
3L80 transmission with 6 quarts
(5.7 L) of Dexron® II or Dexron® III.
Fill 4L80-E transmission with
7.7 quarts (7.3 L) of only Dexron® III.
In arctic conditions, use OEA in both
model transmissions.
