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 81 of 779
Malfunction
Probable Cause
Corrective Action
c. Obstructed
oil
cooler
core
c. Remove oil coolers (table 5-2) and remove
passages.
obstructions from oil cooler core passages
(table 6-37). Install oil coolers (table 7-12).
d. Low engine oil pressure.
d. Refer to para 3-9, above, for corrective
action.
e. Damaged baffles or deflectors.
e. Refer to para 3-9, 4a.
f. Plugged baffles and air deflectors.
f. Remove engine (chapter 5) and clean
thoroughly. Replace engine (chapter 7).
3. Engine fails to reach normal
a. Engine warm-up rpm too low for
a. Increase engine warm-up speed from 1100
operating temperature.
prevailing temperature.
rpm to 1400 rpm.
b. Damaged baffles or deflectors.
b. Refer to 2e, above, for corrective action.
3-11. Troubleshooting Intake Manifold Flame Heater Fuel Syste m
1. No fuel to intake manifold
flame heater.
2.
Fuel to intake manifold, but
flame heater will not ignite
fuel.
3. Intake manifold heater on
one side of engine fails to
operate.
a. Purge pump inoperative.
b. Flame heater fuel filter plugged.
c. Fuel inlet solenoid valve
not
operating due to electrical or
mechanical failure.
d. Manifold heater spray nozzle
restricted or plugged.
e. Restricted or plugged fuel supply
tubes.
f. Fuel check valve inoperative.
a. Insufficient air for combustion in
chamber.
b. No electrical current to ignition
unit.
c. Spark plug not operating.
d.
Electrical
lead
to
ignition
unit
damaged.
e. Improper heater spray nozzle
pattern .
a.
Electrical
lead
to
ignition
unit
damaged, unit defective or spark
plug not operating.
b. Spray nozzle line plugged or
damaged.
c. Spray nozzle plugged.
a.
b.
c.
d.
e.
f.
—
Refer to pertinent vehicle Technica l
Manual, Appendix A, for corrective action.
Remove filter and clean or replace element
(table 6-44).
Remove fuel inlet solenoid valve (table 5-3).
Replace damaged or inoperative valve.
Install solenoid valve (table 7-11).
Remove, overhaul, and install manifold
heater (table 6-40).
Clean tubes.
Remove fuel check valve.
a. Always crank engine as heater is operated.
b. Refer to pertinent vehicle Technical
Manual, Appendix A, for corrective action.
c. Replace spark plug (table 6-40).
d. Remove electrical lead and install new
electrical lead (table 6-44).
e. Replace heater spray nozzle (table 6-40).
a. Remove electrical lead or unit and install
new lead or unit (table 6-44).
b. Remove and replace line (table 6-40).
c. Remove and replace nozzle (table 6-40).
3-11
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