TM 5-4320-274-14&P
Table 5-1. Troubleshooting
Malfunction
Test or Inspection
Corrective Action
PUMP
1. PUMP FAILS TO FUNCTION PROPERLY.
Step 1. Inspect impeller for damage or wear.
If damage or wear is apparent, replace impeller.
Step 2. Inspect adapter shaft and keys for damage.
If damage is apparent, replace damaged parts.
Step 3. Inspect the wear plate for worn areas.
If wear is obvious, replace the wear plate.
Step 4. Check peeler for proper clearance.
Adjust peeler (para 6-5).
Step 5. Check clearance of impeller-to-wear plate.
Adjust impeller-to-wear plate (para 6-5).
2. PUMP OPERATES WITH EXCESSIVE NOISE.
Step 1. Inspect for loose, broken or damaged impeller.
Tighten loose impeller; replace damaged impeller.
Step 2. Inspect for defective seal.
If defect is obvious, replace seal.
Step 3. Check peeler for proper clearance.
Adjust peeler (para 6-5).
3. PUMP LEAKS.
Step 1. Inspect check valve gasket for damage.
Replace damaged check valve gasket.
Step 2. Inspect seal for damage.
If damaged, replace seal.
Step 3. Inspect suction valve for damage.
If damaged, replace.
4. PUMP WILL NOT OPERATE.
Step 1. Check main power source for defective fuse and/or circuit breaker.
Replace fuse and/or reset circuit breaker.
Step 2. Inspect for frozen or damaged impeller.
Loosen or replace the impeller and inspect for proper clearance.
5-2