Doosan GV158TIC, Operation & Maintenance Manual

Page: 155 / 162

Appendix - 149 -
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Engine assembly tolerance
(Unit: mm)
Items Specifications Remark
Cylinder
block Inside dia. of liner forced in joint part (upper part) ø145.800 ~ ø145.840 ø145.8 H7
Inside dia. of liner forced in joint part (lower part) ø144.500 ~ ø144.540 ø144.5 H7
Inside dia. of liner color forced in part ø153.900 ~ ø154.150 ø153.9 H11
Liner colored surface depth 9.965 ~ 9.995
Cylinder
liner Outside dia. of liner forced in joint part (upper) ø145.761 ~ ø145.786 ø145.8 g6
Outside dia. of liner forced in joint part (lower) ø144.432 ~ ø144.457 ø144.5 f6
Outside dia. of liner color part ø153.65 ~ ø0153.75 ø153.8
Liner collar height 10.03 ~ 10.05
Liner forced in joint part (upper) 0.014 ~ 0.099
Liner forced in joint part (lower) 0.043 ~ 0.108
Liner collar part clearance 0.150 ~ 0.500
Inside dia. of liner ø127.990 ~ ø128.010 ø128 ±0.01
Liner's roundness & columness (upper) 0.01 From top up to 168 mm
Liner's roundness & columness (lower) 0.015
From bottom up to
85 mm
Liner's projection 0.04 ~ 0.08 Measure at 4 place
Piston Outside diameter of piston ø127.739 ~ ø127.757 Measure 71.5 mm part
from bottom
(long length)
Inside diameter of piston pin ø 46.003 ~ ø46.009
Max. allowable weight per engine 50g
1st ring groove width 3.5
2nd ring groove width 3.040 ~ 3.060
Oil ring home width 4.020 ~ 4.040
Piston
ring Top ring height (thickness) 3.075 ~ 3.095
2nd ring height (thickness) 2.978 ~ 2.990
Oil ring height (thickness) 3.97 ~ 3.99
Top ring axial direction clearance 0.095 ~ 0.145
2nd ring axial direction clearance 0.050 ~ 0.082
Oil ring axial direction clearance 0.030 ~ 0.070
Top ring end part clearance 0.30 ~ 0.45
2nd ring end part clearance 0.40 ~ 0.60
Oil ring end part clearance 0.40 ~ 0.70
Piston
pin
Piston pin's outside diameter ø45.994 ~ ø46.000
Clearance between piston pin & pin hole 0.003 ~ 0.015
Connecting
rod
Con rod small end part width 38.700 ~ 39.000
Con rod large end part width 35.341 ~ 35.380 35.5 C8
Con rod cap 32.800 ~ 33.100 32.8 +0.3
Con rod axial direction clearance 0.240 ~ 0.392
Con rod small end part axial direction clearance 0.064 ~ 0.126
Con rod bush oil clearance 0.055 ~ 0.071
Con rod small end inside diameter (w/h bush) ø46.055 ~ ø46.065