Doosan AD158TI, Руководство по эксплуатации и техническому обслуживанию

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Disassembly and assembly of major components - 102 -
●
Install the oil pan and tighten the fixing bolts. T h e n take care not to squeeze out the gasket.
●
Install the guide tube and insert the oil level gauge.
6.3.19. Cylinder head
●
Blow the cylinder head bolt holes with com-
pressed air to remove the foreign material
cleanly.
●
Wipe off cleanly the junction part of cylinder
block's head gasket.
●
After confirming whether there is foreign
material or not necessarily, if there is,
remove it.
●
Assemble a gasket fitting with the fixing pin
of cylinder block.
●
Fit the cylinder head assembly on the cylin-
der block aligning with its dowel pin. (Take
care not to damage the head gasket.)
●
Tighten the cylinder head bolts to the specified torque according to step by step.
However, prior to tightening the bolts, with a long steel rule, the parallel between the cylinder heads must
be adjusted.
< Cylinder head bolts tightening order >
(1) First step: Tighten temporarily 1 - 2
threads by hands.
(2) Second step: Tighten to a bout 8
kg.m
with wrench.
(3) Third step: Tighten to 15
kg.m with a
torque wrench.
(4) Fourth step: Rotate 90° by rotation
angle method .
(5) Fifth step: Finally tighten additionally
rotating 90°.
* Standard length of bolt and use limit:
from the head seat face to tip
Take care for the foreign material not to get into the cylinder head suction passages.
EFM2076I
4
2
1
6
5
3
EFM2077I
Intake side(Spark plug)
Exhaust side
Bolt No. Standard length Use limit
3, 6 168 mm 171 mm
2, 4, 5 144 mm 147 mm
1 109 mm 112 mm