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 78 of 779
Malfunction
Probable Cause
Corrective Action
2. Loss of engine power.
a. Air leak in intake manifold.
a. Remove turbosuperchargers (table 4-1).
Remove intake manifolds (table 4-4).
Repair air leak. Install intake manifolds
(table 4-4) and install turbosuperchargers
(table 4-1).
b. Turbosuperchargers worn ,
b. Refer to 1c, above for corrective action.
plugged, or failed.
c. Leak i n
exhaust pipes o r
c. Repair or replace exhaust pipes and mani-
manifolds.
folds (table 5-5).
3-8. Troubleshooting Fuel System
1. No fuel being delivered
from fuel injector nozzles.
2. Fuel being delivered at
nozzles but engine will not
stare run, or runs rough on
one or more cylinders.
3. Engine runs hot, misfires, or
runs rough.
a. Plugged primary fuel filter ,
secondary
fuel
filter, o r
fuel/water separator filter or fuel
system not free of air.
b. Defect in vehicle fuel system.
c. Damaged fuel hoses (fuel pump to
filter or filter to fuel injection
pump).
d. Defective fuel pump
a. Failed fuel injection pump.
f. Failed fuel injection pum p
coupling.
a. Operating with contaminated fuel
or partially plugged fuel filters,
refer to 1a, above.
b. Flame heater not operating (low
ambient temperature).
c. Fuel injector nozzle and holder not
functioning properly.
d. Fuel injection pump not timed
properly.
e. Fuel injection pump not func-
tioning properly.
a. Restricted induction air supply.
b. Low fuel pressure from fuel supply
pump or leaking hoses and con-
nections.
c. Fan clutch slipping.
d. Leaking fuel tubes at nozzle and
holder assemblies.
a. Service primary fuel filter, secondary fuel
filter, or fuel/water separator filter. Refer
to pertinent vehicle Technical Manual,
Appendix A for procedures.
b. Troubleshoot vehicle fuel system. Refer to
pertinent vehicle Technical Manual, Ap-
pendix A for procedures.
c. Remove damaged fuel hoses (table 4-1).
Install new fuel hoses (table 4-1).
d. Troubleshoot fuel pump. Refer to TM 9-
2910-213-34 for procedures. If trouble
cannot be corrected remove pump (table 4-
1). Refer to TM 9-2910-213-34 fo r
overhaul. Install pump (table 4-1) .
e. Remove fuel injection pump (table 4-1).
Refer to TM 9-2910-212-34 and overhaul
pump. Install injection pump (table 4-1).
f. Remove fuel injection pump (table 4-1).
Replace coupling (tables 6-29 or 6-45).
Install injection pump (table 4-1).
a. Drain fuel tank and refill with proper fuel.
Refer to pertinent vehicle Technica l
Manual, Appendix A, for proper fuel.
b. Refer to para 3-4 (2 and 3) for corrective
action.
c. Remove fuel injector nozzle and holders
(table. 4-7). Rebuild nozzle and holders
(table 4-7). Install nozzle and holder (table
4-7 ).
d. Time fuel injection pump (para 4-4). Also
refer to TM 9-2910-212-34.
e. Remove fuel injection pump (table 4-1).
Refer to TM 9-2910-212-34 for overhaul
procedures. Install pump (table 4-1).
a.
b.
c.
d.
Service air cleaner. Refer to pertinent veh-
icle Technical Manual, Appendix A, for
proper fuel.
Remove fuel supply pump (table 4-1).
Refer to TM 9-2910-213-34 for overhaul
procedures. Install pump (para 7-17a).
Tighten all connections and replace
damaged hoses.
Remove engine fan (table 4-3).
Tighten connections. Remove fuel injector
tubes (table 4-1). Replace damaged tubes.
Install injector tubes (table 4-1).
3-8
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