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 Corrective Action
Probable Cause
e. Adjust fuel injection pump linkage to get
e. Improper fuel injection pump
complete travel. Refer to TM 9-2910-212-
operating lever travel or engine
34 for procedures on adjusting pump and
linkage adjustment.
linkage.
f. Refer to item 3, above, for corrective action.
f. One or more cylinders not firing.
Fuel injector nozzles not func-
tioning properly.
g. Time fuel injection pump (para 4-4). Also
g. Fuel injection pump not properly
timed.
refer to TM 9-2910-212-34.
h. Low cylinder compression. (Worn
h. Check valve clearance (para 4-23). Check
piston rings or burned valves.)
cylinder compression (para 4-22) and take
appropriate corrective action tabulated in
item 2h, above.
j. F a i l e d turbosupercharger. (in
Remove turbosupercharger (Table 5-1).
j.
tur-
for a failed
checking
Overhaul turbosupercharger, refer to TM 9-
2 9 9 0 - 2 0 0 - 3 4 . Install serviceable tur-
bosupercharger, a quick check
bosupercharger (para 7-17b).
should be made to see that tur-
bosupercharger vanes turn freely.
Vanes which have excessive drag
will have low output.)
k. Leaking engine exhauet system
k. Repair exhaust system. Refer to pertinent
causing r e d u c e d pressure to
vehicle Technical Manual, Appendix A.
turbosuperchargers.
Remove engine exhaust manifold (table 5-
exhaust manifolds (table 7-9).
l. R e m o v e rear fan and accessory drive
l. Fuel injection pump advance unit
housing assembly (table 5-8). Rebuild fuel
not functioning properly.
injection pump advance unit (table 6-29).
Install rear fan and accessory drive housing
assembly (table 7-5).
a. Refer to paragraph 3-10 for corrective
a. Cooling fans not operating.
5. Excess engine power:
action.
b. Adjust fuel injection pump high idle screw.
b. Improper fuel injection pump high
Refer to TM 9-2910-212-34 for procedures.
idle screw or bridge setting.
c. Improper fuel injection pump
c. Time fuel injection pump (para 4-4). Also
timing.
refer to TM 9-2910-212-34.
Fuel injection pump governor not
Adjust fuel injection pump governor. Refer to
6. Engine overspeeds beyond
properly adjusted.
TM 9-2910-212-34 for procedures.
2640 rpm at on load:
a. Some cylinders not firing (low
a. Operate engine at part load to increase
7. Engine will not idle, but
ambient temperatures).
cylinder head temperature or use intake
runs well under load.
manifold heater.
b. Reset idle screw and check for sticking
b. Improper adjustment of engine
idle screw or linkage sticking.
linkage.
c. Fuel injector nozzles not func-
c. Remove fuel injector nozzles. Refer to table
tioning properly.
checking, and installing nozzle and holder
assembly.
d. Fuel injection pump governor not
d. Adjust fuel injection pump governor. Refer
properly adjusted.
to TM 9-2910-212-34 for procedures.
e. Fuel injection pump not func-
e. Remove fuel injection pump (table 4-1).
tioning properly.
Overhaul fuel injection pump. Refer to TM
9-2910-212-34 for instructions. Install
a. Engine cylinders and intake air
a. Operate engine under load to increase
8. Engine smokes:
cylinder head temperatures. Increase idle
too cold for efficient combustion.
(a) White or grey smoke
speed, use manifold heater.
indicating unburned fuel.
3-4
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