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Page Title:
Table 5-1. Direct Support Troubleshooting - Continued |
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 TM 5-4930-233-14
TM 4930-14/1
Table 5-1. Direct Support Troubleshooting - Continued
ITEM
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
LOW PRESSURE PUMP
1.
LOW PRESSURE PUMP DOES NOT PUMP CORRECTLY
Step 1. Inspect for foreign objects lodged in check valve or seat of pump tube.
Remove foreign objects and replace defective parts as needed (paragraph 5-18).
Step 2. Check for worn piston packings in pump tube body and/or cylinder.
Replace packings as required (paragraph 5-18).
Step 3. Inspect for damaged or bent shafts or cylinders.
Replace damaged parts (paragraph 5-18).
2.
LOW PRESSURE PUMP LEAKS LUBRICANT FROM CYLINDER HEAD BODY
Check pump tube gaskets and/or packings for wear
Replace worn gaskets and packings in pump tube assembly (paragraph 5-18).
HIGH PRESSURE PUMP
1.
HIGH PRESSURE PUMP DOES NOT PUMP CORRECTLY
Step 1. Check for foreign objects lodged in check valve or seat of pump tube.
Remove foreign objects and replace defective parts as needed (paragraph 5-19).
Step 2. Check for worn piston packings in pump tube body and/or cylinder.
Replace packings as required (paragraph 5-19).
Step 3. Inspect for damaged or bent shafts and cylinder.
Replace damaged parts (paragraph 5-19).
5-5
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