1198 / 1526
ENGINE
30
Standard and Repair size of second main journal and thrust washer
Dimensions in mm
Size
Width of
Thickness of
2nd main journal
thrust washer
Standard
32.062/32.000
2.39/2.34
Larger – I
32.362/32.300
2.51/2.46
Larger – II
32.562/32:500
2.61/2.56
Gear mounting diameter on crank shaft ‘D’. Fig. 9.
50 00
+ 0 018
+ 0.002
mm
Crank shaft gear inner bore diameter
50 00
+ 0 025
mm
- 0.000
Crank shaft flange diameter for mounting flywheel. ‘F’. Fig. 9.
130.00
+ 0 028
mm
0.003
Width of crank pins ‘E’. Fig. 9.
38.13/37.93
mm
Width of crankshaft journals other than 2nd journal.
32.200/32.000
mm
Fillet radius on 2nd main journal
4 - 4.5
mm
Fillet radius on crank pins & other journals.
3.5 - 4
mm
Pretension of main bearing shell in parent bore.
0.074 - 0.134
mm.
Radial clearance between crankshaft journals and main bearings.
0.04 - 0.08
mm
Axial play of crankshaft
0.19 - 0.29
mm
Hardness of crankshaft main journals and crank pins.
53 - 59
HRC
Maximum permissible taper and ovality on crankshaft main journals &
0.01
mm
crank pins
Maximum permissible runout of crankshaft journals when supported at
0.1
mm
first & 5th crankshaft journals.
Permissible runout of flange for mounting flywheel.
0.02
mm
Permissible lateral runout of crankshaft gear wheel mounting dia.
0.02
mm
Maximum permissible imbalance of crankshaft with counterweights,
30
gm
without flywheel, held on 2nd & 5th main bearings at 450 rpm.
cm.
Maximum permissible out of parallelism between crank pin and main
0.01
mm
journal axis (on bearing axis)