Front Crankshaft Seal: Service and Repair
NOTE: As of August 1985 the number of spring washers has been increased from 3 to 4.
When performing repairs, it is prohibited to increase the number of spring washers to 4 by adding a spring washer, 4 new spring washers must always be fitted.
The old version (3 spring washers) may be retained on engines up to 1985.
If, when performing repairs, 4 spring washers (2nd version) are used in place of 3 spring washers (1st version), the tightening torque should be increased to 370 - 400 Nm.
Crankshaft Arrangement 1st Version:
1 V-belt pulley
2 Bolt M 8 x 22
3 Vibration damper
4 Bolt M 18 x 1.5 x 45
5 Diaphragm springs (3 required)
6 Hub
7 Radial sealing ring
8 Woodruff key
9 Timing case cover
10 Crankshaft Sprocket
11 Crankshaft
NOTE: Moisten the radial with engine oil between sealing and dust lips before installing.
NOTE: The belt pulley on the crankshaft is made either of grey cast iron or of pressed steel sheet.
The cast iron belt pulley is sensitive to fracturing.
Crankshaft Arrangement 2nd Version:
1 V-belt pulley
2 Bolt M 8 x 22
3 Vibration damper
4 Bolt M 18 x 1.5 x 45
5 Diaphragm Springs (4 required)
6 Hub
7 Radial sealing ring
8 Woodruff key
9 Timing Case cover
10 Crankshaft sprocket
11 Crankshaft
Renewing
1 Remove hub, vibration damper and V-belt pulley. Service and Repair
2 Force out radial sealing ring by means of a screw driver.
CAUTION: Do not damage crankshaft and seating bore for radial sealing ring.
3 Remove burr from edge of radial sealing ring seat.
4 Pull in radial sealing ring by means of installation sleeve (1). For installing, use the hexagon head bolt (107) for mounting hub to crankshaft and one diaphragm spring (106).
The radial sealing ring must be positioned at right angles to the crankshaft journal.
NOTE: Hubs with running grooves from the radial sealing ring must be renewed
5 Install hub, vibration damper and V-belt pulley.
The bolt M 18 x 1.5 x 45 (4) is installed with 4 diaphragm springs (2nd version) (see note at the beginning of this article).