TM-9-2815-220-24
AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL FOR AVDS-1790 2CA, 2DA and 2DR Air-Cooled 12-Cylinder Diesel Engines
TM-9-2815-220-24 - Page 149 of 1563
TM 9-2815-220-24
FUEL SYSTEM ABNORMAL CONDITIONS
0020 00
MALFUNCTION 6:
(Continued)
Fuel injection pump deficiencies.
PROBABLE CAUSE
CORRECTIVE ACTION
(2) Check manual control for full travel or
disconnected linkage.
Adjust or repair as
required (WP 0040, Engine Operating
Parameters).
f.
(Continued)
Manual fuel shut-off
malfunction (improper control linkage
adjustment or internal failure).
(3) Remove fuel injection pump shut-off cover
and inspect lever operation.
If defective,
replace fuel injection pump (WP 0115, Fuel
Injection Pump Assembly Replacement).
(1) Operate engine fuel shut-off (electric and
manual separately) six to eight times.
This
may free fuel control from stuck position.
Attempt engine start.
g. Fuel control stuck in "No-Fuel" position
(result of improper preservative oil during
long-term storage).
(2) Check fuel-metering operation as follows:
PROCEDURE
OBSERVATION
ANALYSIS
Install pressure test gauges:
100 psi gauge in fuel/water separator filter cover bleeder valve
opening (WP 0084, Fuel/Water Separator Automatic Drain
System and Wiring Harness Replacement).
10 psi gauge in primary filter cover bleeder valve opening
(WP 0086).
Turn master and in-tank fuel
pump switches "ON".
5-7 psi at fuel/water
separator filter and at
primary fuel filter.
In-tank pump(s) operation
normal.
Below 5 psi at fuel/water
separator filter and at
primary fuel filter.
Screens clogged or pump(s)
defective (refer to pertinent
vehicle technical manual).
PROBABLE CAUSE
CORRECTIVE ACTION
(3) Remove fuel shut-off cover and inspect fuel
control lever (lever is stuck when in
extreme right position).
Refer to pertinent
fuel injection pump technical manual.
(4) Manually move lever to the left, counter
clockwise, and alternately rotate (both
directions gradually) until full travel and
complete freeness of lever is obtained.
g. (Continued)
Fuel control stuck in "no-fuel"
position (result of improper preservative oil
during long term storage).
(5) Reinstall fuel shut-off cover and check
engine for normal start.
WP 0020 00-7
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