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Table 2-1. Troubleshooting-Continued
Corrective Action
Probable Cause
Malfunction
c. Replace or repair valves (para 3-
c. Valves defective.
20).
d. Repair or replace pump (para 3-
d. Water pump defective.
8).
a. Replace or repair injector (para 3-
a. Fuel injector defective.
5. Engine Exhaust Smokey.
13).
b. Replace rings (para 3-26).
b. Piston rings defective.
c. Replace piston (para 3-26).
c. Piston cracked or broken.
a. Replace piston or connecting rod
a. Piston or connecting rod broken.
6. Engine Stops Suddenly.
(para 3-26).
b. Replace camshaft or camshaft
b. Camshaft or camshaft gear
gear (para 3-30).
defective.
c. Replace crankshaft (para 3-33).
c. Crankshaft defective.
a. Tighten
or replace flywheel (para
a. Flywheel loose or defective.
7. Engine Noisy.
3-21).
b. Replace
bearings (para 3-26).
b. Connecting rod bearings defective.
c. Replace
bearings (para 3-32).
c. Main bearings defective.
d. Replace
pins (para 3-26).
d. Piston pins loose or broken.
a. Replace
pump (para 3-25).
a. Oil pump defective.
8. Engine  Has
Low
or
No
Oil
b. Replace
bearings (para 3-32).
b. Main bearings defective.
Pressure.
c. Replace
bearings (para 3-26).
c. Connecting rod bearings defective.
d. Replace
units.
d. Sending units defective.
a. Replace armature (para 3-9).
a. Starter armature defective.
9. Starter Fails to Crank Engine.
b. Replace flywheel ring gear (para
b. Flywheel ring gear defective.
3-21).
c. Charge or replace (TM 10-3930-
c. Batteries low.
243-12).
a. Replace ring (para 3-26).
a. Piston rings defective.
10. Engine Oil Consumption High.
b. Replace piston (para 3-26).
b. Piston defective.
c. Replace sleeves (para 3-26).
c. C ylinder sleeves defective.
d. Replace guides (para 3-19).
d. Valve guides worn.
e. Repair leaks.
e. Check for leaks.
a. Replace brush holders (para 3-9).
a. Generator brush holders defective.
11. Engine  Generator  Ammeter
b. Adjust or replace.
b. Regulator faulty.
Shows Low or No Charging Rate
When Batteries Are Low.
Replace generator (para 3-9).
Engine generator field winding.
12. Engine Generator Ammeter
grounded
Shows Charge When Batteries
Are Fully Charged.
a. Replace armature (para 3-9).
a. Armature shorted or grounded.
13. Generator Overheats.
b. Replace bearings (para 3-9).
b. Bearing defective.
a. Replace or repair torque convertor
a. Torque convertor defective.
14. Truck Will Not Move.
(para 3-38).
b. Replace or  repair transmission
b. Transmission defective.
(para 3-38).
c. Replace or  repair  differential
c. Differential defective.
(para 3-46).
a. Repair pump (para 3-71).
a. Hydraulic pump defective.
15. Forks Will Not Lift.
b. Repair cylinder (para 3-73).
b. Lift cylinder defective.
c. Replace valve (para 3-72).
c. Control valve defective.
a. Repair cylinder (para 3-73).
a. Tilt cylinder defective.
16. Forks Will Not Tilt.
b. Replace valve (para 3-72).
b. Control valve defective.
c. Repair pump (para 3-71).
c. Hydraulic pump defective.
a. Repair cylinder (para 3-64).
a. Steering cylinder defective.
17. Excessive Looseness in Steering.
b. Repair valve (para 3-59).
b. Steering valve defective.
2-2

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