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ENGINE
35
Standard and repair sizes of camshaft eccentric for vacuum pump and connecting rod bearing
Camshaft
Bearing bore in
Wall thickness of bearing
eccentric dia
installed condition
shells ready for installation
mm
mm
mm
Standard
32.000-31.984
32.050-31.030
1.475-1.487
Standard – I
31.900-31.884
31.950-31.930
1.525-1.537
Repair size – I
31.750-31.734
31.800-31.780
1.600-1.612
Repair size – II
31.500-31.484
31.550-31.530
1.725-1.737
Radial clearance
0.030-0.066
mm
Connecting rod small end parent bore
19.021/19.000
mm
Connecting rod small end bush – outer dia
19.048/19.035
mm
inner dia
15.7/15.6
mm
Centre distance between big & small end bores
92.000/91.950
mm
Out of parallelism of bearing bores of connecting rods
0.03 mm on 100 mm
Width of connecting rod on big end and small end
21.935/21.883
mm
Axial play (end play) of connecting rod
0.065-0.317
mm
Maximum permissible piston projection beyond cylinder liner parting
0.1 - 0.3
mm
surface
ENGINE LUBRICATION SYSTEM :
Fig.11.
Bore diameter in housing for drive shaft ‘A’
17.018/17.000
mm
Diameter of drive shaft ‘A’
16.984/16.973
mm
Bore diameter in drive and driven gear for drive shaft ‘A’
16.962/16.944
mm
Diameter of idler shaft ‘B’
15.034/15.025
mm
Diameter of bore in housing for idler shaft. ‘B’
15.018/15.000
mm
Bore diameter of idler gear for idler shaft ‘B’
15.073/15.055
mm
Installation height of idler shaft in housing ‘D’
39.2 + 0.3
mm
Height of oil pump gear
39.960/39.926
mm
Height of gear wheel housing
40.025/40.000
mm
Installation height of driven gear on drive shaft
0.5-0.8
mm
Maximum permissible axial play of oil pump drive shaft ‘E’
0.04
mm
Diametral clearance between drive-shaft and oil pump housing bore
0.016-0.045,
mm
Interference between drive shaft and drive/driving gear
0.011-0.040
mm
Diametral clearance between idler gear and idler shaft
0.021-0.048
mm
Interference between idler shaft and housing
0.007-0.034
mm
Radial clearance between housing and gear tip
0.030-0.105
mm
Axial clearance between housing cover and gear
0.040-0.099
mm
Backlash between driven and idler gears
0.15-0.25
mm
Backlash between oil pump drive gear and camshaft gear
0.18-0.34
mm