Komatsu ecot3 PC300LC-8 Shop Manual page 903

50 Disassembly and assembly
2) Check that there is no dirt and foreign
matter on the cylinder head mounting sur-
face and in the cylinders and then set cyl-
inder head gasket (87).
a Check that the gasket is set to the
holes of the cylinder block.
3) Install cylinder head assembly (81) to the
cylinder block.
PC300, 350-8
4) Tighten the mounting bolts at least 2 – 3
turns with the fingers.
2
Threads and head seat of each
bolt: Engine oil (EO15W-40)
5) Tighten the bolts in the order of the num-
bers shown in the figure.
1st time: 150 ± 9.8 Nm {15.3 ± 1.0 kgm}
2nd time: Return all bolts 360°
3rd time: 115 ± 4.9 Nm {11.7 ± 0.5 kgm}
4th time: Check tightening torque of
115 ± 4.9 Nm {11.7 ± 0.5 kgm}
5th time: 120° ± 5° (Tighten with tool B3)
a When not using tool B3 at the 5th time,
make a mark on the cylinder head and
each bolt with paint and then tighten the
bolt by 120° ± 5°.
q Refilling with coolant
Add coolant through the coolant filler to the
specified level. Run the engine to circulate the
coolant through the system. Then, check the
coolant level again.
5
Coolant: 36 l
SEN02636-03
25