Doosan GL08K, Руководство по эксплуатации и техническому обслуживанию

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Maintenance - 55 -
3.1.33. Cylinder head

Remove the cylinder head bolts in the
reverse order of tightening but remove it
step by step.
First step : Loosen 1 ~ 2 threads
Second step : Remove by loosening
fully.
However, remove the total bolts
simultaneously by the step of 1 and 2.

Lay the removed bolts orderly not to
damage the threads at all and store.
CAUTION :
Prevent a collision between the bolt thread each other.

Take out the cylinder head gasket and scrap it.

Remove the foreign residues from the cylinder head surface and block surface.
CAUTION :
Try not to make any damage on the contact surfaces.

Disassembly of cylinder head
- Remove the snap ring from the both
ends of rocker arm shaft by means of
a plier.
- As pressing the valve spring with a
special tool, remove the cotter pin,
valve spring.
- Take out the intake and exhaust
valves.
- For removal of the valve seat, apply
arc welding work to two points of
valve seat insert, and pull out the
valve seat insert with inner extractor.
EAMD102I
Compress
the spring
EA0M4007
EA3M2032
Valve seat
insert
Welding bead
Cylinder head