Method For Adjusting Valve Clearance - Komatsu PC500LC-10R Shop Manual

TEST AND ADJUST VALVE CLEARANCE
For standard values, see STANDARD VALUE TABLE, "STANDARD VALUE TABLE FOR ENGINE".
Remove the testing tools and restore the machine after the test is finished.
NOTICE
Be sure to remove the gear A.
REMARK
Replace the gasket with a new one, and install the plate (5) to
the flywheel housing.
3
Plate (5) mounting bolt:
27 to 34 Nm {2.8 to 3.5 kgm}

METHOD FOR ADJUSTING VALVE CLEARANCE

After testing, adjust the valve clearance according to the following procedure, if necessary.
After setting the No. 1 cylinder at the compression top dead center, adjust valve clearance of No. 1 cylinder.
1.
Loosen lock nut (7) with adjustment screw (6) fixed.
2.
Insert feeler gauge B in the clearance between rocker arm
(8) and crosshead (9) and adjust the valve clearance with
adjustment screw (6).
With feeler gauge B inserted, turn adjustment screw (6)
and adjust it (6) until the feeler gauge B can move lightly.
For standard values, see "Standard value table", "STAND-
ARD VALUE TABLE FOR ENGINE".
3.
Tighten lock nut (7) with adjustment screw (6) fixed.
3
Locknut (7):
58.8 to 73.5 Nm {6.0 to 7.5 kgm}
Tighten lock nut (7), and check the valve clearance again.
After finishing the adjustment, restore the machine.
30-30
30 TESTING AND ADJUSTING
PC500LC-10R