 |
|||
|
|
|||
|
|
|||
| ||||||||||
|
|
 Probable Cause
Corrective Action
Malfunction
Drain crankcase oil and fill with proper
c. Improper grade of oil for
c.
g r a d e oil. Refer to pertinent vehicle
prevailing ambient temperatures.
Technical Manual, Appendix A.
d. Refer to 1h, above, for corrective action.
d. Obstructed crankcase oil passages.
a. Fill oil pan to proper level Refer to per-
a. Low oil level.
3. No engine oil pressure.
tinent vehicle Technical Manual, Appendix
perature.
b. Refer to 1 d, above, for corrective action.
b. Oil pressure sending unit not
functioning properly.
c. Refer to 1 h, above, for corrective action.
c. Obstructed crankcase oil passages.
d. Refer to 1 f, above, for corrective action.
d. Oil pressure regulator valve not
functioning properly.
e. Refer to 1 k, above, for corrective action.
e. Oil pump or drive gears failed.
a. Remove oil cooler air restrictions or replace
4. High engine oil tem-
a. Restricted air flow through oil
damaged screens, deflectors, and baffles
perature.
coolers.
b. Replace aending unit (tables 5-10 and 7-3).
b. Oil temperature sending unit not
functioning properly.
c. Replace switch (tables 5-10 and 7-3).
c. High oil temperature warning light
sending switch not functioning
properly ).
d. Oil cooler thermostatic bypass
d. Replace valve ( para 6-38).
valve not functioning properly.
e. Restricted engine oil cooler.
e. Remove engine oil cooler (table 5-2). Clean
and repair oil cooler (table 6-3 7). Install oil
cooler (table 7-1 2).
f. Cooling fan clutch slipping or
f. Refer to para 3-10 for corrective action.
inoperative. Engine runs hot.
g. Excessive fuel, engine runs hot.
g. Refer to fuel system troubleshooting, para
h. Defective pieton cooling nozzles.
h. Remove oil pan (table 4-5). Inspect pump
and nozzle. Replace defective parts. Install
oil pan (table 4-5).
a. High oil temperature or oil leaks.
a. Refer to 4, above, for corrective action.
5. Excessive oil consumption.
Repair oil leaks.
b. Improper grade oil for prevailing
b . Refer to pertinent vehicle Technical
Manual, Appendix A, for proper grade for
` temperature.
prevailing temperature.
c. Restricted crankcase breather
c. Remove (table 5-5), clean (para 6-2) and
install (para 7-9) breather tubes
system.
d. Worn or scored pistons, cylinders,
d. Refer to para 3-8, 4e.
or rings.
e. Worn valve stems or valve guides.
e. Remove cylinders and replace defective
parts. Assemble cylinders.
f. Worn or leaking turbosup-
f. Refer to para 3-7, 1c for corrective action.
ercharger oil scale.
3-10. T r o u b l e s h o o t i n g
Cooling
System
a . Fan drive clutch slipping or
a. Rebuild front fan drive clutch (table 6-24).
1. Cooling fans not operating.
inoperative.
Rebuild rear fan drive clutch (table 6-24).
b. Fan drive gear train not func-
b. Disassemble engine (chapter 5). Replace
tioning.
damaged parts. Assemble engine (chapter
a. Oil cooler thermostatic bypass
2, Cooling fam operate but
a. Refer to 4d, above.
engine does not cool.
valve not functioning properly.
b. Defective oil cooler bypass valve.
b. Replace valve (table 6-37).
3-10
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals