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 75 of 779
Malfunction
(b) Blue smoke indicating
presence of engine oil in
combustion chamber.
(c) Black smoke indicating
a rich fuel mixture.
Note: Black smoke
during acceleration is
normal.
9. Engine noise.
(a) Abnormal
noise.
knocking
(b) Tapping noise.
(c) Grinding or squeaking
noise.
Probable Cause
b.
c.
d.
a.
b.
c.
d.
a.
b.
c.
d.
e.
f.
g.
a.
b.
c.
a.
b.
a.
Defective fuel injector nozzle
gaskets.
Water in fuel.
Low compression.
One or more cylinders not firing.
Worn or stuck piston rings or
worn cylinder.
Worn valve guides.
Worn turboeupercharger oil seals.
Restriction in air supply system.
Failed turbosupercharger (ex-
cessive smoke for afflicted engine
bank).
Fuel injector nozzles not func-
tioning, dripping, or retaining
Operating with improper fuel.
Fuel injection pump improperly
adjusted.
Fuel injection pump not properly
timed.
Fuel injection pump advance unit
not functioning properly.
Loose piston pin or pins or broken
piston rings.
Worn engine bearings.
Scored piston or cylinder.
Excessive
Worn or
arm
valve clearances.
damaged valve rocker
Accessories damaged.
1. Fuel injection pump.
2. Generator.
Corrective Action
b.
c.
d.
a.
b.
c.
d.
a.
b.
c.
d.
e.
Replace fuel injector nozzle gaskets (para 7-
11a). Refer to item 7c, above, for other
corrective action.
Service fuel filters and drain fuel tanks.
Refer to 4a, above.
Check cylinder compression, refer to 2j,
above. Replace defective parts.
Refer to 3, above, for corrective action.
(Replace engine.)
Remove cylinders and pistons and replace
rings and worn parts. Refer to 2h, above.
Remove cylinder and replace valve guides.
Remove turbosupercharger (Table 5-1).
Overhaul turbosupercharger refer to TM 9-
2990-200-34 for procedures. Install tur-
bosupercharger (para 7-17b).
Refer to para 3-7.
Remove turbosupercharger (Table 5-1).
Overhaul turbosupercharger refer to TM 9-
2990-200-34 for procedures. Install tur-
bosupercharger (para 7-17b).
Overhaul fuel injector nozzle and holder
assemblies. Refer to 7c, above, for corrective
action. Replace springs.
Check fuel. Refer to 4a, above.
Adiust fuel iniection pump. Refer to TM 9-
2910-212-34 for adjustment procedures.
f. Time fuel injection pump (para 4-4). Also
refer to TM 9-2910-212-34.
g. Refer to 41, above, for corrective action.
a. Remove cylinders and pistons (table 5-9).
Rebuild pistons, rings, and pins (table 6-
12). Install pistons and cylinders (table 7-
4).
b. Disassemble engine (chapter 5). Rebuild
c.
a.
b.
crankshaft, connecting rod assemblies, and
bearings (table 6-8). Assemble engine
(chapter 7).
Remove cylinder and piston (table 5-9).
Overhaul cylinder (table 6-14). Install
piston and cylinder (table 7-4).
Adjust valve clearances ( para 4-23).
Remove valve rocker arm covers. (Refer to
table 4-6. ) Disassemble rocker arm covers.
Replace valve rocker arm assemblies.
Assemble rocker arm covers. Install valve
rocker arm covers.
a. Replace damaged engine accessories.
1. Remove fuel injection pump (table 4-1).
Refer to TM 9-2910-212-34 and overhaul
fuel injection pump. Install injection pump
(table 4-1).
2. Remove generator (table 4-1). Refer to
TM 9-2920-224-35 and overhau l
generator. Install generator (table 4-1).
3-5
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