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 TM 55-1905-220-14-5
3-90.2. EXHAUST VALVE - MAINTENANCE INSTRUCTIONS (Cont).
LOCATION
ITEM
ACTION
REMARKS
ADJUSTMENTS
7.
Exhaust
The exhaust valve bridge
valve
assembly (1) is adjusted
bridge
and the adjustment screw
(7) is locked securely
after the cylinder head
is installed on the engine.
Until wear occurs, or the
cylinder head is recondi-
tioned, no further adjust-
ment is required on the
valve bridge. A complete
valve bridge adjustment
is performed as follows:
a. Place the valve bridge
(8) in a vise and loosen
the lock nut (9) on the
bridge adjusting screw (7).
Loosening or tightening the lock nut with the bridge in place may
result in a bent bridge guide or bent rear valve stem.
b. Install in the valve
bridge (1) on the valve
bridge guide (6).
c. While firmly pressing straight
down on the pallet surface of
the valve bridge (8) turn the
adjusting screw (7) clockwise
until it just touches the valve
stem. Then, turn the screw an
additional 1/8 to 1/4 turn
clockwise and tighten the lock
nut (9) finger tight.
3-1530
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