220 / 1526
75
486 PL ENGINE
P
Stage
Width of 4th main
bearing journal
mm
Normal
27.052/27.000
Normal
I
27.100/27.152
Thickness of 4th main
2.720,2.670,2.620
bearing thrust washers
2.570,2.520 mm
End play of crank shaft
0.070/0.250 mm
Fillet radius of main
2.250/2.750 mm
bearing journals
Fillet radius of crank pin
1.750/2.250 mm
journals
Width 1st, 2nd, 3rd and 5th 27.000/27.200 mm
main bearing journals
Width crank pin journals
24.500/24.700 mm
Maximum permissible
0.005 mm
taper and ovality of main
bearing journals
Maximum permissible cylindricity
0.005 mm
of crank pin
Maximum permissible ovality
0.005 mm
of crank pin
Maximum Permissible
0.03 mm
run out of 2nd, 3rd and 4th
main bearing journals when
supported at 1st and 5th main
bearing journals
Maximum permissible
0.010 mm
out of parallelism between
crank pin and main bearing
journal axis
Pre-tension of main
0.037/0.067 mm
bearing shells
Hardness of crank shaft main
53 to 59 HRC
bearing and crank pin journals
Main bearing parent bore dia
63.720/63.739
Maximum permissible cylindricity
of main bearing parent bore
0.010 mm
Maximum permissible coaxiality
0.030 mm
of main bearing parent bore
Main bearing clearance Grade 1 0.044-0.079 mm
Grade 2 0.038-0.063 mm
Connecting rod (Dimensions) :
Connecting rod small end
Stage
Parent bore
Bush outside
diameter
diameter
mm
mm
Normal
24.021/24.00
24.085/24.060
Connecting rod small end 21.010/21.016 mm
bush inside diameter (to be
finished after installation)
(Piston pin oiled has thumb
push fit in small end bush)
Maximum permissible out
||
0.1/100/A
of parallelism (bend)
between connecting rod
small end and big end parent
bores measured at a
distance of 50 mm from
centre line of connecting rod
Center to center distance 160.6 + 0.04 mm
between connecting rod
small end and big end
parent bores
Maximum permissible twist
0.050 mm
of connecting rod measured
at a distance of 50 mm from
centre line of con-rod.
Connecting rod big end
parent bore diameter
53.709/53.690 mm
Stage
Connecting rod Crank pin
big end
journal
bore
diameter with diameter
bearing shell
mm
mm
Normal
50.03/50.061 49.98/49.995
Normal 1
49.930/49.961 49.88/49.895
Repair 1
49.730/49.761 49.745/49.730
Repair 2
49.430/49.461 49.480/49.445