TM 5-4610-218-12
Table 4-2.
Troubleshooting-Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 3.
Check for defective gages.
Replace the gages, paragraph 4-62.
12.
PLUG VALVES LEAK OR DRAW AIR.
Step 1.
Check for cracked or broken valve body.
Replace the valve, paragraph 4-66.
Step 2.
Check for defective packing.
Replace the valve, paragraph 4-66.
Step 3.
Check for sufficient lubrication.
Lubricate in accordance with LO 5-4610-218-12.
13.
AIR RELEASE VALVE WILL NOT OPERATE.
Step 1.
Check for clogged lines.
Remove and clean the lines.
Step 2.
Check for cracked valve housing.
Replace the air release valve, paragraph 4-61.
Step 3.
Check for defective diaphragm or diaphragm spring.
Replace the air release valve, paragraph 4-61.
Step 4.
Check for inoperative three-way release valve.
Replace the air release valve, paragraph 4-61.
14.
WATER PUMP OPERATION NOISY.
Step 1.
Check to see if impeller mounting shaft is bent.
Replace the shaft.
Step 2.
Check to see if the impeller is loose or shaft is broken.
4-50
