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 TM 55-1905-223-24-5
(5) Crosshead Adjustment.
NOTE
Crosshead adjustment must always be made before attempting to adjust the
valves.
(a) With the "A" valve set mark aligned with the pointer on the gear cover (FIGURE 3-21) and
both valves closed on cylinder No. 5, loosen the crosshead adjusting screw locknuts on the
intake and the exhaust valve crossheads for cylinder No. 5.
NOTE
The same procedure is used to adjust the intake and exhaust crossheads.
(b) Turn the adjusting screw out at least one turn.
(c) Hold the crosshead down against its mating valve stems.
(d) Turn the adjusting screw in until it touches the top of the valve stem, ,but does not raise the
crosshead.
(e) Hold the adjusting screw in this position. The adjusting screw must not turn when the locknut
is tightened to its torque value (FIGURE 3-24). Tighten the locknut to the following value:
25 ft-lb. (35 N ) torque.
With adapter
m
30 ft-lb. (40 N ) torque.
Without adapter
m
(f) Adjust the intake and the exhaust valve on No. 5 cylinder before rotating accessory drive to
the next valve set mark. Refer to Valve Adjustment, item (6) in this procedure.
(6) Valve Adjustment.
(a) With the "A" valve set mark aligned with the pointer on the gear cover (FIGURE 3-21) and
both valves closed on cylinder No. 5, loosen the lock nuts on the intake and the exhaust
valve adjusting screws.
(b) Select a feeler gauge for the correct valve lash specification.
Valve Lash Specification
INTAKE
EXHAUST
(0.028 mm)
(0.058 mm)
0.011-inch
0.023-inch
3-41
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