Doosan DV11 - Page 215

DV11
Operation and Maintenance
210
Appendix
Printed in Mar. 2005 PS-MMA0608-E1A
Group Part Inspection item
Stand value
for assembly
Limit
for use
Correction Remark
Intake
φ43.50~φ43.75
Valve seat
assembly
part’s inner
diameter of
cylinder head
Exhaust
φ41.50~φ41.75
-
Intake
φ
43.554~φ43.570
Diameter of
valve seat
Exhaust
φ
41.554~φ41.570
-
Valve seat assembly
part’s depth of
cylinder head
11.9~12.1 -
Inner diameter of
valve guide
φ8.000~φ8.015
-
W
hen replacing
v
alve guide & seat,
w
ork simultaneously
by special tools
Valve guide assembly
part’s inner diameter of
cylinder head
φ14.000~φ14.018
-
Diameter of valve guide
φ14.028~φ14.039
-
Clearance between
valve guide and cylinder
head installing hole
0.01~0.039 -
Apply oil over
valve guide and
press it into
the hole
Concentricity between
valve seat and
valve guide
0.05 -
Replace
valve spring
Without spring
seat
Free length 62.5 -
44mm 37.4~41.4 37
Tension
force
(kg)
31.6mm
63.3~68.3 63
Intake
valve
spring
Squareness
(along free
length direction)
1.6mm
2.0 or
less
Replace
valve spring
Free length 62.0 -
41mm 19~22 18.5 Tension
force
(kg)
28.6mm
30.6~34.6 30
Squareness
(along free
length direction)
1.6mm
2.0 or
less
Replace
valve spring
Inside spring
Free length 62.5 -
44mm 37.4~41.4 37
Tension
force
(kg)
31.6mm 63.3~68.3 63
Exhaust
valve
spring
Squareness
(along free
length direction)
1.6mm
2.0 or
less
Replace
valve spring
Outside spring
Intake 0.4 -
Valve
clearance
(at cold)
Exhaust
0.5 -
Adjust
Joining surface of valve
stem and rocker arm
bush
- -
Grind or
replace if
severely pitted
on tip of
rocker arm
and stem
Inner diameter of
rocker arm bush
φ24.991~φ25.012
φ25.04
Rocker
arm
&
push rod
Diameter of
rocker arm shaft
φ24.939~φ24.960
φ24.90