TM 5-4310-379-14
(14)
Using insert driver, press valve seat insert (8) into cylinder head (5).
NOTE
Use care not to bend valve guides during installation. Do not use valve guides as a means of turning the
cylinder head over or in handling the cylinder head. (15) Using guide installer, press valve guide (7) into
cylinder head (5).
(16)
Install valves (6) into valve guide (7).
(17)
Hold valves in place with a strip of masking tape and turn cylinder head right side up.
(18)
Install spring seat (4), spring (1) and spring cap (3).
(19)
Using spring compressor, compress the spring (1) and install the two-piece valve lock (2).
NOTE
Minimum pressure required to start to open the exhaust valve must not be less than 15 pounds.
(20)
Using spring checking gage, note gage reading the moment the exhaust valve starts to open. If reading is less
than 15 pounds, replace valve springs (1).
FOLLOW-ON MAINTENANCE
Install cylinder head assembly (para. 5-19).
5-63
