Chpter IV Mechanical System
Great Wall Baoding Internal Combustion Engine
Manufacturing Company Limited
165
Table 4-4-1 Matching selection for the main shaft bearing shell of the turbocharged diesel engine
GW4D20/GW4D20B
In mm
Color of main shaft
bearing shell
Main bearing journal of crankshaft
1
2
3
φ60.015
～
φ60.020
φ60.009
～
φ60.014
φ60.002
～
φ60.008
Main
bearing
aperture
of
cylinder
body
1
φ64.000
～
φ64.006
Yellow
Shell
thickness:
1.976~1.980
Clearance:
0.020~0.040
Yellow
Shell thickness:
1.976~1.980
Clearance:
0.026~0.046
None
Shell thickness:
1.980~1.984
Clearance:
0.024~0.044
2
φ64.007
～
φ64.012
Yellow
Shell
thickness:
1.976~1.980
Clearance:
0.026~0.046
None
Shell thickness:
1.980~1.984
Clearance:
0.024~0.044
Blue
Shell thickness:
1.984~1.988
Clearance:
0.022~0.042
3
φ64.013
～
φ64.018
None
Shell
thickness:
1.980~1.984
Clearance:
0.024~0.044
Blue
Shell thickness:
1.984~1.988
Clearance:
0.022~0.042
Blue
Shell thickness:
1.984~1.988
Clearance:
0.022~0.042
Table 4-4-2 Selecting the main shaft bearing shell of the turbocharged diesel engine
GW4D20/GW4D20B
Group number (1, 2 or 3) of the
cylinder body main bearing hole
+ group number (1, 2 or 3) of the
crankshaft main bearing journal
Main shaft bearing shell color
code (number)
Fit clearance
=1-3
Yellow (1)
0.020
～
0.046 mm
=4
None (2)
0.024
～
0.044 mm
=5-6
Blue (3)
0.022
～
0.048 mm
