Table 3-3. Water System Troubleshooting

TM 5-6640-213-14

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

1. PUMP FAILS TO START OR STOPS DURING OPERATION.

Step 1.

Check for defective wiring.

Check wiring and correct.

Step 2.

Check if current overload causes circuit breaker switch to open.

Locate and correct cause for the overload. Close circuit

breaker and restart the motor.

2. PUMP FAILS TO DELIVER WATER AT PROPER PRESSURE.

Insufficient water, or motor speed too low.

Step 1.

Fill tank. Check electrical system and correct applicable

defect.

Step 2.

Check for leak in shaft seal.

Disassemble pump and replace seal.

Step 3.

Water inlet clogged.

Drain pump and tank, disassemble and clean suction pipe.

Step 4.

Check for defective work impeller.

Replace if defective.

3. PUMP VIBRATES OR OPERATES NOISILY.

Step 1.

Check for foreign. matter in volute, or ensure mounting.

Disassemble and clean.

Tighten pump mounting bolts.