TM 10-4320-309-14
TM 4320-14/1
Table 3-4. Unit Troubleshooting - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5. LACK OF POWER
Step 1.
Check position of speed control lever knob.
Move to START position to increase engine speed. [Refer to para 2-9(3).]
Step 2. Check for insufficient fuel supply.
Fill fuel tank, if necessary.
Step 3.
Check air cleaner restriction indicator.
If a red band appears in window of air cleaner restriction indicator, replace air
cleaner element. (Refer to para 3–14.)
6. ENGINE STOPS RUNNING
Step 1.
Check for insufficient fuel supply.
Fill fuel tank, if necessary.
Step 2.
Check air cleaner restriction indicator.
If a red band appears in window of air cleaner restriction indicator, replace air
cleaner element. (Refer to para 3–14.)
7. EXCESSIVE LUBRICATION OIL CONSUMPTION
Step 1.
Check for leakage at oil drain plug or oil filler cap.
Tighten oil drain plug or oil filler cap.
Step 2. Check for a black smoky exhaust and oil in exhaust discharge.
Notify Direct Support Maintenance.
8. PUMP FAILS TO PRIME
Step 1.
Check for low engine speed.
Move speed control lever knob to START position to increase engine speed. [Re-
fer to para 9(3).]
Step 2. .Check for an air-locked pump.
Remove discharge hose connection. Prime pump by filling volute with water/fuel.
(Refer to para 2-8.) Leave discharge hose connection on.
Step 3. Check for a clogged suction hose.
If clogged, clean suction hose.
Step 4. Check for leaks in the pump suction line.
Repair leaks in suction port connections or in suction line hoses.
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