Komatsu Galeo PC800-8 Shop Manual page 926

SEN01054-01
Installation
a Before installing the cylinder head, check the
following items.
1) Measure stem length (e) of every bolt.
2) Make sure that stem length (e) of every
bolt is as follows.
Short bolt: Less than 170.8 mm
q
Long bolt: Less than 205.8 mm
q
3) If a mounting bolt is longer than the above
using limit or it has been tightened 5 times
(there are 5 punch marks on it), do not
reuse it but replace it.
4) Check that the cylinder head mounting
face and inside of the cylinder are free
from foreign matter.
5) When fitting the gasket, check that the
grommets are fitted correctly.
1. Set cylinder head gasket (119).
2. Install cylinder head (118).
16
50 Disassembly and assembly
a Tighten cylinder head mounting bolts (1) –
(6) and auxiliary bolt (7) in the following
order.
a A special socket is required to tighten the
head bolts.
2
Mounting bolt:
Molybdenum disulfide lubricant
3
Mounting bolts ((1) – (6) in the following
figure):
a Tighten in the order of (1) – (6).
1st time: 137 – 157 Nm {14 – 16 kgm}
2nd time: 284 – 294 Nm {29.0 – 30.0 kgm}
3rd time:
1] When using tool A2
Retighten each bolt by 90°
order of (1) – (6).
(LM-P)
+30°
in the
+0
PC800, 850-8