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 TM 55-1905-219-14-8
4-5. GENERAL (Continued).
Table 4-3. Portable Fire Pump (P-250) Power Head - Troubleshooting.
NOTE
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1. Power head.
Step 1.
Faulty, broken or cracked leaf valves.
Refer to paragraph 4-7.6.
Step 2.
Faulty or blown cylinder head gasket.
Refer to paragraph 4-7.6.
Step 3.
Exhaust ports clogged with carbon.
Refer to paragraph 4-7.6.
Step 4.
Piston ring grooves clogged with carbon.
Refer to paragraph 4-7.6.
Step 5.
Cylinder walls scored.
Refer to paragraph 4-7.6.
Step 6.
Piston crown eroded or carboned.
Refer to paragraph 4-7.6.
4-16
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