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Page Title:
Troubleshooting Lubricating System |
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 Corrective Action
Malfunction
Probable Cause
e. Improperly adjusted fuel injection
e. Adjust fuel injection pump. Refer to TM 9-
pump.
2910-212-34 for procedures.
f . Remove fuel injection pump (table 4-1).
f . Fuel bleeder valve in injection
Refer to TM 9-2910-212-34 for overhaul
pump not functioning properly.
p r o c e d u r e s . Install fuel injection pump
a. Adjust fuel injection pump. Refer to TM 9-
a . F u e l injection pump improperly
4. Excessive exhaust smoke.
2910-212-34 for procedures.
a d j u s t e d causing excessive fuel
delivery.
b. F u e l injector nozzle and holder
b . Refer to item 2c, above, for corrective
functioning
assemblies
not
action.
properly. Nozzles dripping or
nozzle holder spring broken.
c. T u r b o s u p e r c h a r g e r f a i l e d o r
c.
Refer
to
above,
for
restricted induction system.
troubleshooting procedures.
d. Fuel injection pump not properly
d. Time fuel injection pump (table 4-1). Also
timed.
refer to TM 9-2910-212-34.
e. Remove cylinders and pistons (table 5-9)
e. Worn or scored pistons, cylinder,
or rings.
and replace defective parts (tables 6-12 and
6-14). Install pistons and cylinders (table 5-
9).
Troubleshooting
Lubricating
System
a. Drain oil pan and refill with proper grade
1. Low engine oil pressure.
a. Improper grade oil for prevailing
o i l for prevailing temperature. Refer to
temperature.
p e r t i n e n t vehicle Technical Manual, Ap
b. Check engine idle speed and reset to 700 to
b. Engine idle speed too low.
7 5 0 rpm.
c. Fill oil pan to proper level. Refer to per-
c. Insufficient oil in oil pan.
tinent vehicle Technical Manual, Appendix
d. Remove oil pressure sending unit (table 5-
d. Engine oil pressure sending unit
10). Install new unit (table 5-10).
not functioning properly.
e. Refer to 4, below, for corrective action.
H i g h engine oil temperature or
e.
diluted oil.
f. Remove oil pressure regulator valve (table 4-
f . Oil pressure regulator valve not
2 ) . Replace damaged parts (para 6-38d).
operating properly.
Install oil pressure regulator valve (table 4-
2).
g. Refer to pertinent vehicle Technical
g. Oil filters partially obstructed.
Manual, Appendix A for service procedures.
h. Crankcase oil passages obstructed.
h. Disassemble engine (chapter 5). Clean oil
passages (para 6-9c). Assemble engine
(chapter 7).
j. Oil pump pickup tube screen
j . Remove oil pan (table 4-5). Clean ob-
obstructed.
structions from pickup tube screen. Install
oil pan, (table 4-5).
not
functioning
k. Oil pump
k . Remove oil pan (table 4-5). Remove oil
properly.
pump (table 5-10). Rebuild oil pump (table
l. Engine bearings worn.
l. Disassemble engine (chapter 5). Replace
worn bearings and necessary parts.
Assemble engine (chapter 7).
a. O i l p r e s s u r e s e n d i n g u n i t n o t
a. Refer to 1d, above, for corrective action.
2. High engine oil pressure.
functioning properly.
b. Oil pressure regulator valve not
b. Refer to 1f, above, for corrective action.
functioning properly.
3-9
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