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 TM 5-1940-277-20
TM 1940-20/2
Table 2-1. Unit Preventive Maintenance Checks and Services (cont)
W-Weekly
Q-Quarterly
S-Semiannually
Item to be inspected
Interval
Procedure: Check for and have repaired, filed,
Item
or adjusted as needed
No.
S Item
Perform all operator PMCS first
WQ
8
CAUTION
(cont)
Loose V-belts can overheat or slip off
the drive pulley, causing premature
belt or engine failure. Overtightened V-
belts may cause premature belt or
bearing failure.
(1) V-belt (3) adjustment. Check adjustment by applying moderate hand
pressure at center of V-belt between water pump pulley (4) and alternator
pulley (5). Obtain a deflection of between 1/4 and 1/8 inch (6.4 and 3.2
mm). To decrease tension, unlock T-handle adjuster lock (6) and turn T-
handle adjuster (7) clockwise. To increase tension, turn T-handle adjuster
counterclockwise. Ensure alternator mounting bolts are tight.
(2) V-belt (3) check. Check if belts are worn, burnt, cracked, broken, or
missing.
Engine belt (MK2/w Cummins 6BT 5.95 liter engine)
The MK2/w Cummins 6BT 5.95 liter engine has a serpentine belt in which
tension can not be adjusted.
(1) Belt inspection. Refer to paragraph 3-119.
d.
Fuel injection pump (8). Check that engine idle is adjusted to between 650
and 750 rpm. Check for proper adjustment of throttle and stop cables. Check
for fuel and oil leaks and for loose or missing hardware.
e.
Engine motor mounts (9). Check that engine mounting bracket bolts are tight
and not missing. Torque the eight nuts on motor mounts to
32.55 lb-ft (447 Nm).
f.
Transmissions (10). Check for oil leaks. Check for proper adjustment of shift
cable and for loose or missing hardware.
Change 2
2-10.1/( 2-10.2 blank)
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