TM 10-4320-307-24
Table 2-3.
Unit Maintenance Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 4. Check for pump cavitation.
a.
Reduce suction lift and/or friction losses in suction line.
b.
Open suction valves to reduce pumped fluid dissolved gases.
Step 5. Check for the pumping of air.
Locate and eliminate source of air bubble.
Step 6. Check pump body and suction piping for foreign material.
a.
Remove suction and discharge piping and check for obstructions (para 2-56).
b.
Inspect pump body for any foreign material or obstruction.
10. PUMP OUTPUT LOW
Step 1. Be sure pump is properly primed.
Step 2. Check that engine speed is properly adjusted for desired flow and conditions.
Adjust engine speed.
Step 3. Check that suction and discharge valves are fully opened.
Open all suction and discharge valves.
Step 4. Check for a loose connection or defective gasket in suction or discharge lines.
a.
Tighten connection (para 2-56).
b.
Replace gasket (para 2-56).
Step 5. Inspect piping for leaks.
Replace piping.
Step 6. Check that speed increaser clutch is fully engaged.
Fully engage speed increaser.
11. EXCESSIVE SPEED INCREASER NOISE DURING SHIFTING
Step 1. Check speed increaser oil level.
Add or replace as necessary (para 2-34).
2-35
