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 TM 55-1905-220-14-3
Table 3-30.
Pressure Troubleshooting.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
Low exhaust valve opening pressure.-
Step 1.
Check for worn or eroded valve seat.
Replace worn or eroded valve seat. Refer to paragraph 3-89.
Step 2.
Check valve seat for chips at point of contact with valve. Replace valve seat.
Refer to paragraph 3-89.
Step 3.
Check for cracked valve seat.
Replace the valve seat. Refer to paragraph 3-89.
Step 4.
Check for worn valve or valve locks.
Replace the valve or valve locks. Refer to paragraph 3-90.
Step 5.
Check for worn or broken valve spring.
Replace the spring. Check the valve cage and valve stop for wear; replace them if
necessary. Refer to paragraph 3-90.
Step 6.
Check for dirt or foreign material in injector. Replace the injector. Refer to
paragraph 3-71.
Step 7.
Check for worn valve spring stop seat. Replace the valve spring stop. Refer to
paragraph 3-89.
2.
High valve opening pressure.
Step 1.
Check for carbon or foreign material in injector if spray tip.
Replace injector. Refer to paragraph 3-71.
3-110
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