TM 9-2320-211-20
Trouble
Expedient remedy
1. Front differential noisy
Remove front propeller shaft and axles, and operate the vehicle without front-
wheel drive.
2. Defective differential
Remove intermediate-to-rear axle propeller shaft and rear axle shafts. When
axle shafts are removed, the openings in the ends must be covered securely to
keep out dirt and foreign matter.
3. Noisy intermediate or rear axle wheel
wheel
bearings
(in-
a. Burned-out
Move the disabled wheel onto a rock, log, or similar object to raise the wheel as
termediate axle).
high as possible if a jack is not available. While the wheel is raised, tie the
axle as tight as possible to the frame with a chain. Caution should be
exercised to prevent the chain from causing damage to the brake lines.
Remove the axle shaft from the axle housing and cover the opening to keep
out foreign matter. Repeat the operation on the opposite side of the vehicle.
NOTE
When wheels are tied up, the vehicle should not be loaded too heavily.
Repeat the operation described above for intermediate-to-rear axle propeller
b. Burned-out wheel bearings (rear axle).
shaft instead of axle shafts.
Remove transfer-to-intermediate and intermediate-to-rear axle propeller
4. Intermediate differential noisy. Defective
shafts. Remove axle shafts from axles with defective differentials. The
differential.
vehicle will operate on power supplied by the front axle.
NOTE
When power is supplied by the front axle only, the vehicle should not be loaded too heavily.
Section IX. ENGINE MAINTENANCE IN VEHICLE--GASOLINE
2-42. General
d. If the pressure in the cylinder is appreciably
below
normal
(110
to
130
psi),
pour
one
The gasoline engine is a 4-cycle, 6-cylinder, in-line,
teaspoonful of engine oil through the spark plug
liquid-cooled,
valve-in-head,
electrically-ignited
hole on top of the piston to prevent loss of com-
Continental R6602 model. Left and right are the
pression temporarily and repeat c a b o v e .
left and right sides respectively of the engine as
NOTE
viewed from the operator's seat. Front is the fan
Low compression brought up to normal by
and drive belt end of the engine, while rear is the
oil sealing indicates piston, piston ring, or
flywheel end.
c y l i n d e r s l e e v e w e a r o r d a m a g e . Low
2-43. Compression Test
compression not brought up to normal by
NOTE
t h i s method indicates valve or cylinder
Battery voltage should be normal (para 2-
head gasket leakage. In either case, notify
22) before proceeding with the following
direct support maintenance personnel.
steps.
e. Repeat c above for each remaining cylinder,
a. Remove all spark plugs (para 2-121) from the
and if necessary, repeat d a b o v e .
left side of the engine.
f. When the compression test is completed, install
the spark plugs (para 2-121).
as far as it will go and leave it in the locked-out
position.
2-44. Intake and Exhaust Manifolds
CAUTION
a. Manifold Vacuum Test.
D o not crank the engine more than is
NOTE
necessary to obtain a maximum reading.
The key numbers in parentheses are for
c. Insert a compression gage in the No. 1 spark
plug hole, depress the starter button to crank the
(1) Remove pipe plug (1), and install gage in
engine, and note the maximum compression in-
plug hole.
dicated by the gage.
