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KD 702_1003_1404 Workshop Manual_cod. ED0053029340_1° ed_ rev. 00
6
138
136
137
C B** A*
STD 22,787÷22920 23,050÷23,100
0,130÷0,313
1
a
22,987÷23,120 23,250÷23,300
2
a
23,087÷23,220 23,350÷23,400
3
a
23,187÷23,320 23,450÷23,500
Shoulder half rings, oversized elements
Dimensions (mm):
* A of Fig. 134.
** B of Fig. 135.
Grinding B as per relevant table, you can mount the following
half rings:
1
st
Oversized element Half rings 1 and 2 + 0.10 mm on both
sides of the bearing
2
nd
Oversized element Half rings 1 and 2 + 0.10 mm on one
side of the support and + 0.20 mm on
the other side.
3
rd
Oversized element Half rings 1 and 2 + 0.20 mm on both
sides of the bearing.
Crankshaft front and back oil seal rings
Caution – Warning
An ambient temperature below -35°C may damage the rings.
The front oil seal ring 1 inserted into the oil pump cover and the
back one 2, in the ywheel side ange.
If warped, hardened, or cracked, replace them.
For the replacement:
- Carefully clean the housing
- Keep the ring immersed in engine oil for about half an hour.
- Drive it into its housing with a buffer exercising a uniform
pressure on the whole front surface. Be sure that the two
surfaces A and B meet on the same level.
- Rell the interior hollow with grease and lubricate the seal lip
with thickened oil.
Note: Before major engine overhaul, in case of oil leakage in
the seal area of rings 3 and 4, you can remedy this by
replacing the rings and pushing them about 2 mm deeper
with respect to the previous ones.
If the rings are black it means zones 3 and 4 of the
crankshaft are tempered. In this case it is necessary to
remount a ring of the same colour.
If the rings are brown it means that zones 3 and 4 of the
crankshaft are not tempered. In this case it is necessary
to remount brown coloured rings.
Disassembly / Reassembly
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