Doosan GL08K - Maintenance Specification Table

Appendix
- 181 -
 Maintenance Specification Table
(unit : mm)
Group Part Inspection item
Stand value
for assembly
Limit
for use
Correction Remark
Engine
body
Cylinder
block &
liner
Inside diameter of
cylinder liner for
wear
111 ~
111.022
111.122 Replace liner
Measure unworn
portion beneath the
rim of the upper
side
Amount of liner
projection
0.03 ~ 0.08 –
Projection
difference between
adjacent liners :
Ø 0.15
The flatness of upper
surface of cylinder
block
0.05 –
Correct with a
surface grinder
Referenced length
200 mm
Hydraulic test for 1
Minute (kg/cm
2
)
4 – Replace if leaky
Cylinder
head &
valve
Valve seat
depression
Intake
0 ~ 0.3 0.55
Replace valve
seat
Exhaust
0 ~ 0.3 0.55
Cylinder head height
114.9 ~ 115.1 114.4
Replace cylinder
head
Hydraulic test for 1
minute (kg/cm
2
)
4 – Replace if leaky Water temp. 70 ° C
Major
moving
parts
Piston
Outer dia. of piston
(13 mm from the
bottom)
110.903 ~
110.917
– Replace liner
Measure at 13mm
away from lower
surface of piston
Clearance between
piston and liner
0.083 ~ 0.119 0.3
Replace one
worn more
Width of
piston ring
grooves
Top ring
– – Replace piston if
groove width is
beyond specified
value
2nd ring
3.06 ~ 3.08 –
Oil ring 4.04 ~ 4.06 –
Piston projection
from cylinder block
upper surface
-0.01 ~ 0.5 – Must exist
Measure unworn
portion beneath
the rim of the
upper side
Permissible weight
difference of each
piston
30 g 96g  Replace piston
Piston
ring
Piston ring
gap
Top ring
0.40 ~ 0.60 1.5
Replace ring
Standard gauge
inside diameter :
108
2nd ring
0.8 ~ 0.95 1.5
Oil ring 0.30 ~ 0.50 1.5
Piston ring
side
clearance
Top ring – –
Replace ring or
piston
Limit for use is if
for standard
clearance.
2nd ring
0.07 ~ 0.102 0.15
Oil ring 0.05 ~ 0.085 0.15
Direction of ring gap
– –
Cross Install by
120
°