Komatsu ecot3 PC300LC-8 Shop Manual page 356

SEN02625-06
16. Install gasket D4 to the tip of adapter D3 and
connect it to the injector mount.
17. Fix adapter D3 with the injector holder.
3
Holder mounting bolt:
1st time: 9.8
2nd time: 40.2
18. Connect compression gauge D2 to adapter D3.
a Apply a little amount of engine oil to the con-
necting parts of the adapter and gauge so
that air will not leak easily.
19. Install rocker arm assembly.
3
Rocker arm assembly mounting bolt :
64.7
20. Adjust the valve clearances.
a For the adjustment, refer to the section, "Ad-
justing valve clearance".
16
± ±
2.0 Nm {1.0 0.2 kgm}
± ±
3.9 Nm {4.1 0.4 kgm}
± ±
4.9 Nm {6.6 0.5 kgm}
21. Select the no-injection cranking operation from
the machine monitor.
a See the section of "Special functions of ma-
chine monitor".
k
Be sure to select the no-injection crank-
ing operation. Otherwise, the engine can
be started during the inspection, poten-
tially inducing risks to the inspecting per-
sonnel.
22. Rotate the engine with cranking the starting
motor and measure the compression pressure.
a Read the pressure gauge pointer when it is
stabilized.
23. After finishing testing, remove the testing tools
and return the removed parts.
a Install the injector and fuel high-pressure
tube according to the following procedure.
1) Mate the injector's projection (a) to notch (b)
of the holder and then set them to the
cylinder head.
a Set the injector with the above mating po-
sition toward the fuel inlet connector in-
sertion side.
2) Tighten the injector holder mounting bolt by 3
or 4 threads.
3) Set fuel inlet connector (20).
a Press it in until you feel the O-ring clicks
in.
a Install it in place temporarily using retain-
ing nut (19).
3
Retaining nut:
14.7
4) Tighten the injector holder mounting bolt.
3
Holder mounting bolt:
1st time:
9.8
2nd time:
40.2
5) Tighten retaining nut (19) of the fuel inlet
connector.
30 Testing and adjusting
± ±
5.0 Nm {1.5 0.51 kgm}
± ±
2.0 Nm {1.0 0.2 kgm}
± ±
3.9 Nm {4.1 0.4 kgm}
PC300, 350-8