Doosan DL06 - Page 73

DL06K Interim Tire-4 Diesel Engine Disassembly and Reassembly of Major Components
71
3.2.3. Inspection of valve and valve guide
1) Valve
z After cleaning valve with fuel, check it.
z Valve stem outer diameter
Measure the valve stem outer diameter
at 3 positions (top, middle, and bottom),
and check for any wear and if beyond
the limit value, replace the valve.
(mm)
Dimension
Description
Standard Limit
Intake
valve stem
6.963 ~
6.977
6.93
Exhaust valve
stem
6.950 ~
6.964
6.91
z Valve seat contacting faces
Check the valve seat contact surface
for any crack and wear, and if
necessary, correct with grinding paper,
and if excessive, replace it.
z Valve head thickness
Measure the thickness of valve head
and if beyond the limit value, replace
the valve.
(mm)
Dimension
Description
standard Limit
Intake valve
(A)
3.3 ~ 3.7
2.8
or less
Exhaust valve
(A)
3.3 ~ 3.7
2.8
or less
EFM2036I
Valve stem
A
EE1OM066