Doosan AD158TI, Operation & Maintenance Manual

Page: 83 / 294

Disassembly and assembly of major components - 77 -
●
If the measured value exceeds the
maximum allowable limit, replace the
cylinder head.
<Lower face warp and height>
(3) Inspection and measurement of valve and valve guide
a) Valve
●
After cleaning the valves with clean
diesel oil, measure the valve as fol-
low.
Measure the valve stem’s outside
diameter at upper, middle, and lower
to determine the wears and when the
wear limit is more than limit, replace
the valves.
●
inspect the scratch and wear of valve
stem seal contacting face, and if nec-
essary correct with the grinding
paper but if severe replace it.
●
If valve head thickness becomes less
than limit, replace the valve.
EA6M2002
War page
Standard Limit
0.05 mm
or less
0.2 mm
Thickness : t
(reference)
113.9 ~
114.0 mm
112.9 mm
EFM2036I
Stem tip
Valve Standard Limit
Intake
ø11.969 ~
ø11.980 mm
ø11.949 mm
Exhaust
ø11.944 ~
ø11.955 mm
ø11.914 mm
A
EE1OM066
Valve Standard Limit
Intake 4.6 ~ 5.0 mm 4.1 mm
Exhaust
4.33 ~
4.83 mm
3.83 mm