MOTOR OVERHEATS.

TM 5-6640-213-14

T a b l e 3-3. Water System Troubleshooting - Continued

MALFUNCTION

TEST OR INSPECTION

CORRECTIVE ACTION

Step 2. Check for bent shaft, warped impeller, worn bearings.

R e m o v e and inspect volute. Replace defective parts.

4. MOTOR OVERHEATS.

Step 1.

C h e c k for mechanical defects inpumpor motor.

C h e c k motor for easy rotation and straight shaft, and correct

condition as required.

Packing nut too tight, or incorrect voltage.

Step 2.

Adjust packing nut.

C h e c k electrical system and correct

applicable defect.

5, MOTOR FAILS TO START OR HUMS.

Step 1.

I n c o r r e c t electrical current.

Pull plug, check for correct current as shown on motor nameplate.

Step 2.

Defective plug, cord or switch.

Examine plug, cord and switch, replace if defective.

Step 3.

Check if unit is extremely cold.

B r i n g unit to room temperature before starting. Assure the

use of the proper weight pump oil for ambient operating

temperature.

6. MOTOR STOPS DURING OPERATION.

Step 1. Check for defective wiring.

Check wiring and correct.

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