TM 5-3895-371-24&P
Table 3-1. Direct Support and General Support Troubleshooting.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
ASPHALT PUMP FAILS TO DELIVER RATED CAPACITY:
Step 1.
Worn or damaged impeller.
Replace impeller (para 9-11.
Step 2.
Damaged pump bearing.
Replace bearing (para 9-11.
2.
NOISY PUMP OPERATION:
Step 1.
Impeller loose on shaft.
Replace impeller or shaft (para 9-1).
Step 2.
Worn pump shaft bearings.
Replace the bearings (para 9-1).
Step 3.
Shaft seal plate or packings defective.
Replace the seal plate or packings (para 9-1).
3.
PUMP WILL NOT TURN OR TURNS SLOWLY:
Step 1.
Asphalt material below pumping temperature.
Reheat to pumping temperature. (Refer to TM 5-3895-371-10.)
Step 2.
Air leak in suction line from hydraulic reservoir to filter to inlet of charge pump on back
of hydraulic pump.
Tighten all connections.
Step 3.
Defective hydraulic pump or motor. Check for excessive case drain.
Replace defective pump or motor (para 3-5 or 3-6).
step 4.
Hydraulic system pressure low.
lncrease motor bypass pressure to 4500 psi (para 3-5).
3-2
