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TM 10-4320-343-14
Table 4-2. Unit Troubleshooting Table (All Except Model 350 PAFN). (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
3. ENGINE SPEED DOES NOT ADJUST (Non-regulated pump only) (continued).
Step 2
Check for seized fuel control lever at injector pump.
a. Free fuel control lever.
b. Notify direct support maintenance.
4. ENGINE SPEED DOES NOT ADJUST (Regulated pump Model ADC1500 only).
Step 1
Remove cable from controller and check from pins C and D, pins C to E, pins C to G, pins C to H and
pins C to J for shorts.
Replace cable.
Step 2
Remove controller (paragraph 4.14.2). Check for shorts between Pins A to C and B to C on actuator.
Replace actuator (paragraph 4.14.5).
Step 3
Check for short between pins A to C and B to C on controller.
Replace controller (paragraph 4.14.2).
5. ENGINE STARTS OR RUNS ERRATIC AFTER WARMUP.
Step 1
Check for blockage/water in fuel system.
a. Clean fuel feed pump strainer. (paragraph 4.10.17)
b. Drain water from water separator. (paragraph 2.5)
c. Replace fuel filter. (paragraph 4.10.18)
Step 2
Check valve clearance. (paragraph 4.10.23)
a. Adjust valve clearance.
b. Notify direct support maintenance.
6. OIL PRESSURE READING LOW.
Step 1
Inspect for leaks in lubrication system.
Tighten all connections to pumps, lines, filter, pressure gauge, and cooler.
Step 2
Remove and check low oil pressure sending unit for obstructions. (paragraph 4.10.19)
a. Clear obstructions or replace oil pressure sending unit.
b. Notify direct support level maintenance.
Change 1 4-9
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