Doosan V158TI Operation & Maintenance Manual page 185

Compo-
Item
nent
Rocker arm bushing I.D.
Diameter of rocker arm
shaft
Rocker arm oil gap
I.D. of valve tappet
assembly on the block
Tappet clearance
I.D. of bush assembly on
the block (thrust)
I.D. of bush assembly on
the block (middle)
Valve
Timing
system Camshaft bearing
diameter
Camshaft bearing oil gap
(thrust)
Camshaft bearing oil gap
(middle)
Axial free play of the
camshaft
Backlash (crank gear -
camshaft gear)
Backlash (camshaft idler
gear - camshaft gear)
Intake valve clearance
Exhaust valve clearance
Oil pressure
(normal speed) (kg/cm
Oil
pressure
Lubrica-
Oil pressure (no load)
tion
(kg/cm
system
Max. allowable oil
Oil
temperature
tempera-
ture
Oil pressure (no load)
Inspection item
2
)
2
)
Allow-
Specifications able
Limit
ø
25.005 ~
ø
25.083
ø
25.035
ø
24.967 ~
ø
24.930
ø
24.990
0.015 ~ 0.068 0.14
ø
20.000 ~
-
ø
20.021
0.035 ~ 0.077 0.15
ø
70.070 ~
ø
69.464
ø
70.090
ø
70.000 ~
ø
69.192
ø
70.030
ø
69.910 ~
-
ø
69.940
0.060 ~ 0.120 0.24
0.130 ~ 0.180 0.24
0.24 ~ 0.86 -
0.143 ~ 0.292 -
0.112 ~ 0.370 -
0.25 ±0.05 -
0.35 ±0.05 -
4.8 or below 3.5
0.8 ~ 1.4 0.6
°
- 105
°
- 120
- 179 -
Repair
Replace the
bushing
Replace the
shaft
Replace the
bush and shaft
ø20.H7
Replace the
tappet
Replace the
bushing
Replace the
bushing
Replace the
cam or bushing
Replace the
cam or bushing
Check for oil
leaks and the
clearance of
each part
Use the
recommended
oil
No
C
temperatures
higher than this
C
are allowed
Remarks
Appendix