TM 5-3895-383-24
Valve Lash Check
When the valve lash is checked, adjustment is NOT
NECESSARY if the measurement is in the range given in the
chat 3114/3116/3126 Valve Lash.
NOTE:
For valve lash specifications and measurement
procedure refer to Fuel System; topic-Crankshaft
Positions For Fuel Timing And Valve Lash Setting,
located in this manual. Refer to Operation And
Maintenance Manual for service interval for valve
lash adjustment.
3114 Cylinder And Valve Location
3116 & 3126 Cylinder And Valve Location
Valve Lash Adjustment
Use the procedure that follows for adjustment of the valves:
1.
Put No. 1 piston at top center (TC) position. Make
reference to Finding Top Center Position For No. 1
Piston.
2.
With No. 1 piston at top center position of the correct
stroke, adjustment can be made to the valves as shown
in the chart CRANKSHAFT POSITIONS FOR FUEL
TIMING AND VALVE LASH SETTING.
NOTE:
Before any actual adjustments are made, tap (hit
lightly) each rocker arm (at top of adjustment
screw) with a soft mallet to be sure that the lifter
roller is seated against the camshaft base circle.
Valve Lash Adjustment
(1) Valve. (2) Rocker arm. (3) Locknut. (4) Adjustment screw.
3.
Loosen the locknut (3) for the push rod adjustment
screw. If there is not enough clearance for feeler gauge
between rocker arm (2) and valve (1), turn the
adjustment screw (4) counterclockwise to increase the
valve lash.
VALVE LASH SETTING: ENGINE STOPPED
Valves
Gauge Dimension
Intake
0.38 mm (.015 in)
Exhaust
0.64 mm (.025 in)
4.
Put a feeler gauge of the correct dimension between the
rocker arm and valve. Turn the adjustment screw
clockwise until the valve lash is se to the specifications
in the chart VALVE LASH SETTING: ENGINE
STOPPED.
5.
After each adjustment, tighten locknut (3) to a torque of
25 ± 7 Nm (18 ± 5 lb-ft) and check the adjustment
again.
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