TM 5-3805-255-14
0016
Table 5. Propeller Shafts Troubleshooting Procedures for the H100C Loader.
016
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
Drive-line failures are usually indicated by noise or vibrations. The noise or vibration may come and go
as different speeds are reached.
Inspect the areas of the loader around the propeller shafts for signs of grease that may have been
thrown out by the universal joint or slip joints. If grease is found in the area of the universal joints, replace
the grease seals on the spider and bearing assemblies. If grease is found in the area of the slip joint,
tighten the slip joint seal retainer. If the leakage continues, replace the slip joint grease seal.
Check the drive yokes on the torque converter, transmission, transfer drive, and differentials for
looseness. If the yokes can be moved back and forth any appreciable amount, disconnect the propeller
shaft at the yoke and tighten the yoke mounting nuts or capscrews. Torque the nuts or capscrews as
directed (WP 0132). Before tightening the yoke, check for backlash. Backlash indicates that the yoke
splines are worn and the yoke should be replaced.
Check the universal joint spider and bearing assemblies for excessive play. If excessive play is found,
replace the spider and bearing assemblies on the propeller shaft.
1. Check for lack of lubricant.
Check grease seals in slip joints and
1. Noise (Propeller Shafts).
universals (WP 0013). If problem still
exists, go to step 2.
Replace spider and bearing assem-
2. Check for excessive backlash due
bly (WP 0049). If problem still exists,
to worn universal spider or
go to step 3.
3. Check for loose mounting yokes.
Tighten yoke mounting nuts or cap-
screws. If problem still exists, go to
step 4.
4. Check for worn splines in
Replace propeller shaft (WP 0049). If
problem still exists, notify Sustainment
propeller shaft slip joints.
Maintenance.
1. Check for sprung or bent propeller
Replace propeller shaft (WP 0049). If
2. Vibration (Propeller
shaft.
problem still exists, go to step 2.
Shafts).
2. Check for improperly seated
Correct or replace bearing and spider
universal joint bearings.
(WP 0049). If problem still exists, go
to step 3.
3. Check for loose mounting yokes.
Tighten mounting nuts or capscrews.
If problem still exists, notify Sustain-
ment Maintenance.
