TM-9-2815-200-35
ENGINE, WITH CONTAINER:TURBOSUPERCHARGED, DIESEL ,FUEL INJECTION ,90-DEGREE “V” TYPE, AIR - COOLED ,12 - CYLINDER , ASSEMBLY ;MODELS AVDS-1790-2M (2815-856-4996), AVDS-1790-2A AND AVDS-1790-2AM (2815-856-9005)
TECHNICAL MANUAL; DIRECT SUPPORT, GENERAL SUPPORT AND DEPOT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS
TM-9-2815-200-35 - Page 76 of 779
10. Rough or poor idling.
11. Engine surges at all
speeds.
12. Poor fuel economy.
13. Engine stops suddenly.
14. Engine will not stop when
shut off.
Probable Cause
3. Turbosupercharger.
4. Fuel pump
b.
c.
d.
Failed engine bearings or gears.
Dry valve rocker arm shafts and
rocker arm bushing-type bearings.
Cooling fans rubbing housing.
a. Some cylinders not firing.
b. Nozzles not functioning properly.
c. Air leak in intake manifold system.
d. Fuel injection pump not properly
timed.
a. Fuel injection pump governor
improperly adjusted.
b. Injection pump linkage sticking or
binding.
a. Engine operating at below normal
temperature.
b. Operating with improper fuel.
c. Air intake system restricted.
d. Exhaust system restricted.
e. Loss of power or low power.
a. Plugged or damaged fuel supply
system or fuel pump fails to
operate properly.
b. Failed fuel injection pump
coupling.
c. Fuel injection pump fails to
operate properly.
d. Seizure of internal engine com-
ponents.
a. Fuel cutoff in fuel injection pump
inoperative.
b. Binding fuel injection pump
control linkage.
Corrective Action
3. Remove turboeupercharger (table 4-1).
Refer to TM 9-2990-200-34 and overhaul
turbosupercharger.
Install
tur-
bosupercharger (table 4-1).
4. Remove fuel pump (table 4-1). Refer to
TM 9-2910-213-34 and overhaul pump.
Install fuel pump (table 4-1).
b. Use wrench - 5120-793-7895 and turn
engine over by hand. If engine turns hard
and grinding or squealing noiee persists,
disassemble engine (chapter 5) and inspect.
Replace damaged parta. Assemble engine
(chapter 7).
c. New or dry engine must be run at fast idle to
get oil up to rocker arm bushing-type
bearings.
d. Adjust cooling fan clearance (fig. 4-88).
a. Refer to 7, above for corrective action.
b. Refer to 7c, above, for corrective action.
c. Refer to para 3-7 for corrective action.
d. Time fuel injection pump (para 4-4). Also
refer to TM 9-2910-212-34.
a. Adjust fuel injection pump governor. Refer
to TM 9-2910-212-34 for procedure.
b. Clean linkage and inspect for binding or
sticking condition. Refer to pertinent vehicle
Technical Manual, Appendix A. Lubricate
linkage.
a. Refer to 7 and 8, above, for corrective
action. Increase engine operating tem-
perature.
b. Drain fuel tanks and refill with proper fuel.
Refer to pertinent vehicle Technical
Manual, Appendix A, for proper fuel.
c. Refer to para 3-7 for corrective action.
d. Repair exhaust system. Refer to pertinent
vehicle Technical Manual, Appendix A.
Remove engine exhaust manifold (table 5-
5). Repair exhaust manifolds. Install
exhaust manifolds (table 7-9).
e. Refer to 4, above, for corrective action.
a. Refer to para 3-8 for corrective action.
b. Replace coupling. Refer to table 4-1 for
replacement instructions.
c. Refer to 2g, above, for corrective action.
d. Disassemble engine (chapter 5) and inspect.
Replace damaged parts. Assemble engine
(chapter 7).
a. Check electrical lead. Refer to 2g, above, for
corrective action.
b. Refer to 2g, above, for corrective action.
3-6
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