TM 9-2320-289-20
Table 2-3. Mechanical Troubleshooting (Con’t)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
WARNING
Diesel fuel is flammable, When disconnecting fuel lines to test fuel flow,
direct fuel spray away from source of ignition. A fire extinguisher must be
on hand in work area. Failure to follow this warning may result in serious
injury or death to personnel.
Step 2.
Disconnect fuel line from inlet side of heater. Place a suitable container under inlet
line. Check for fuel flow to heater while holding cm-off switch in “ON” position.
If fuel flow is evident, replace heater. (See paragraph 11-16)
If fuel flow is not evident, perform step 3.
Step 3.
Check for restrictions in heater inlet fuel line.
If line is restricted, clear restrictions.
PROPELLER SHAFT
41. MAKES “KLUNKING” SOUND WHEN SHIFTING
Step 1.
Inspect propeller shaft universal joints for play. Attempt to move propeller shaft
forward and back to detect play on yoke.
Replace if there
Step 2.
If “klunking” persists,
42. VIBRATES
Step 1.
Check propeller shaft
Tighten if loose.
is play. (See paragraph
notify your supervisor.
6-3 or 6-5)
mounting bolts for looseness.
(See paragraphs 6-2 and 6-4)
Step 2.
Inspect propeller shaft for damage, buildup of foreign material, and missing weights.
Remove foreign material or replace propeller shaft if damaged or weights are
missing. (See paragraphs 6-2, 6-3, 6-4, and 6-5)
Step 3.
Inspect propeller shaft universal joints for play and binding. Attempt to move
propeller shaft ends forward and back to detect play or binding on yoke.
Replace universal joint if there is play or binding. (See paragraphs 6-3 and 6-5)
Change 2
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