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 TM 55-1905-220-14-4
3-33.2. EXHAUST VALVE - MAINTENANCE INSTRUCTIONS (Cont).
LOCATION
ITEM
ACTION
REMARKS
ADJUSTMENTS
7. Exhaust
The exhaust valve bridge assembly
valve
(1) is adjusted and the adjustment
bridge
screw (7) is locked securely after
the cylinder head is installed on
the engine. Until wear occurs, or
the cylinder head is reconditioned,
no further adjustment is required
on the valve bridge. A complete
valve bridge adjustment is per-
formed as follows:
a. Place the valve bridge (8) in
a vise and loosen the lock nut
(9) on the bridge adjusting
screw (7).
CAUTION
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 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.
d. Remove the valve bridge (1)
and place it in a vise. Use
a screw driver to hold the ad-
justment screw (7), from turn-
ing and tighten the lock nut
(9), to 20-25 lb-ft (27-34 Nm)
3-716
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