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 Chart 2-1. Troubleshooting-Continued
Corrective Action
Probable Cause
Malfunction
4. Excessive engine vibration
a. Loose, worn, or defective engine
and tighten all mountin bolts
mounts
securely.
b. T i g h t e n p u l l e y m o u n t i n g b o l t
b. Loose pulley and damper
c. Replace defective pulley or damper
c. Defective pulley or damper
d. Refer to (1) above.
d. Misfiring
e. R e m o v e f a n b e l t s f o r s h o r t
e. Unbalanced fan
duration. If vibration is no longer
evident, replace fan (para 5-4).
5. Engine smokes
a. Worn piston rings
b. Defective valves
6. Engine knocks excessively
a. Broken valve spring
33).
c. Tighten bolts or replace bearing
c. Loose connection rod or main
bearing bolts or worn bearings
7 . Low or no lubricating oil pressure
a. Worn main bearing
indication
c. R e p a i r o r r e p l a c e a d e f e c t i v e
c. Pressure regulating valve worn or
pressure regulating valve (para 5-
stuck thus restricting the flow of
24.
oil
D i s a s s e m b l e starter and replace
8. Starter will not crank engine
Armature burned out
armature (para 5-21).
a. Disassemble generator and replace
9. Generator not charging
a. Generator
shorted
armature (para 5-20).
b. R e p l a c e a d e f e c t i v e g e n e r a t o r
b. Brush spring tension too low
brush spring (para 5-20).
10. Fully charged battery and a high
a. Short circuit in generator
charging rate
or replace as necessary (para 5-
20).
b. Adjust (Refer to TM 5-2410-233-
20).
properly
a. Refer to TM 5-2410-233-20.
11. Transmission does not operate in
a. Leakage in external lines
b. C h e c k p r e s s u r e s a t t e s t p o i n t s
b. Leakage within transmission
any speed
c. Remove valve for inspection and
c. Pressure relief valve in hydraulic
repair (para 6-4).
control valve stuck open.
d. Remove valve for inspection and
d. Check valve stuck in bore
repair (para 6-8).
e. Remove valve for inspection and
e. Differential valve sticking closed
repair (para 6-4).
f. Safety valve improperly adjusted
a. I n s p e c t d i r e c t i o n a l v a l v e a n d
1 2 . Tractor remains in gear with
a. Obstruction preventing directional
remove any obstruction (para 6-
clutch from releasing.
selector valve in neutral
3).
b. Control linkage improperly ad-
justed
c. Speed and safety valve improperly
adjusted
13. Ripper will not raise
a. Defective relief valve in hydraulic
a. Remove valve for inspection and
repair (para 4-5).
control
b. Improper relief valve setting
Remove and inspect valve (para 4-
Defective relief valve in hydraulic
14. Ripper will not lower
4).
control
Inspect and repair cylinder (para
Worn cylinder piston rod packing
15. Ripper will not stay in ground
4-10).
and seals
a. Replace broken brake spring (para
16. Winch brake not holding
a. Broken brake spring
3-14).
properly
b. Remove valve for inspection and
b. Sticking or damaged piston in
repair (para 3-13).
winch control valve
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