Komatsu PC200-8M0 Shop Manual page 364

SEN06127-00
8. Rotate the crankshaft forward with gear B1,
and align wide slit (b) of the rotation sensor
ring with the top surface of projection (a) of the
front cover.
a When seen from the air conditioner com-
pressor side, the top surface of projection
(a) must be in the range of wide slit (b).
a If you can find the yellow marks of projec-
tion top (a) and wide slit (b), you may
match them each other.
k
No. 1 or No. 6 piston is not set to the
compression top dead center (TDC) if
the crankshaft is set as described
above.
9. Check the movement of the rocker arm of the
No. 1 cylinder to determine which valve should
be adjusted.
a If you can manually move the rocker arms
of intake air valves (IN) the same distance
as the valve clearance, adjust the valves
marked with Q in the valve arrangement
figure.
a If you can manually move the rocker arms
of exhaust valves (EX) the same distance
as the valve clearance, adjust the valves
marked with q in the valve arrangement
figure.
a Valve arrangement figure
12
30-101
101 Testing and adjusting, Part 1
10. Adjust the valve clearance according to the fol-
lowing procedure:
1) Insert clearance gauge B2 into the clear-
ance between rocker arm (12) and cross-
head (13).
2) Loosen locknut (14), and adjust the valve
clearance by using adjustment screw (15).
a With the clearance gauge inserted,
turn the adjustment screw to the
degree that you can move the clear-
ance gauge lightly.
3) With adjustment screw (15) fixed, tighten
locknut (14).
3
Locknut:
24 ± 4 Nm {2.45 ± 0.41 kgm}
a After tightening the locknut, check the
valve clearance again.
11. Turn the crankshaft
according to step 10 and align wide slit (b) with
the top surface of projection (a).
12. Adjust the remaining valve clearances accord-
ing to steps 11 and 12.
a If you adjust the valves marked with Q of
the valve arrangement figure in steps 11
and 12, adjust the remaining valves
marked with q.
a If you adjust the valves marked with q of
the valve arrangement figure in steps 11
and 12, adjust the remaining valves
marked with Q.
13. After finishing the adjustment, remove the tools
and restore the machine .
k
Make sure not to forget removal of gear
B1.
3
Cylinder head cover mounting bolt:
24 ± 4 Nm {2.45 ± 0.41 kgm}
3
Injector terminal nut (8):
1.5 ± 0.25 Nm {0.15 ± 0.025 kgm}
a Check that the injector wiring harness
does not interfere with the rocker arm.
PC200, 200LC, 220, 220LC-8M0
Adjusting valve clearance
one rotation forward