Doosan GL08K - Page 70

Maintenance - 64 -
 Valve head thickness
Measure the thickness of valve head
and if beyond the limit value, replace
the valve.
2) Valve guide
 Insert a valve into cylinder head and
measure the clearance between valve
guide and valve by valve movement. If
the clearance is excessive, measure
the valve and replace the excessively
worn valve or valve guide.
 Valve stem end play
 Assemble the valve at cylinder head's valve guide and see if it is centered with the valve seat
using a special tool.
3) Valve seat
 Check valve seats for damage and
wear and replace them if needed.
 Assemble the valve at the valve seat
of the cylinder head, and check the
amount of depression of the valve
from the lower portion of the cylinder
head using a dial gauge.
EFM2037I
Dimension
Description
Standard Limit
Intake valve 2.7 mm
2.2 mm or
more
Exhaust valve 2.2 mm
1.7 mm or
more
EA0M4052
Measuring
point
Dimension
Description
Standard Limit
Intake valve
0.03 ~
0.065 mm
0.1 mm
Exhaust valve
0.045 ~
0.080 mm
0.15 mm
EDM2032P