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 TM 55-1905-221-14-2
Table 5-1. Troubleshooting.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
PROPULSION ENGINE (Cont.)
e. Chec for contact between valve head and piston for incorrect valve clearance.
k
Replace damaged valve. Refer to paragraph 5-15.
Step 4.
a. Check valve stem for varnish deposits.
Reface valve. Refer to paragraph 5-15.
b. Check for worn valve guide or excessive back pressure.
1. Reface valve and insert. Refer to paragraph 5-15.
2. Replace valve and insert if necessary. Refer to paragraph 5-1.
Step 5.
a. Check for bent valve guide or stem.
Replace damaged stem or guide. Refer to paragrh 5-15.
b. Check for scuffed or scored valve stem.
1. Clean valve stem with crocus cloth dampened with fuel oil.
2. Replace valve if unable to clean.
NOTE
When installing valve, use care in
depressing spring so that cap DOES
NOT SCRAPE valve stem.
5-6
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