Sealing Coolant Pump

Tools and Equipment, Tools and Equipment





1 Flange
2 Coolant pump shaft with compact bearing
3 Coolant pump housing
4 Sliding ring seal
5 Counter-ring with sealing ring
6 impeller
7 Dowel sleeve
a 5.3 - 5.7 mm
c Vent bores

Modified sliding ring seal:

NOTE: In October 1982 a modified sliding ring seal was temporarily installed in the coolant pump.
In the event of repairs, the parts must be installed according to the parts information. The sliding ring seal must be renewed together with the counter ring in the impeller in this case.

Production Breakpoint: October 1982:

Disassembly:





1 Pull off impeller.





2 Cancel preload at several points by means of light hammer blows between coolant pump housing and sliding ring seal and push out sliding ring seal.





3 Force counter-ring out of impeller.

Assembly:





4 Lightly coat housing jacket of sliding ring seal with sealing compound and drive or press sliding ring seal into bearing housing by means of pressing-in sleeve.

CAUTION: Support at bearing housing only and not at coolant pump shaft.





5 Coat sealing ring on counter-ring with brake cylinder paste and push counter-ring with chamfered side (arrow) into carefully cleaned mounting bore of impeller.
6 By means of a chamois leather, remove all dust from the sealing surface of the counter-ring and sliding ring seal.
7 Grease shaft stub of coolant pump shaft and bore in impeller.





8 Press on impeller while supporting the coolant pump shaft.





9 Check impeller for tight seat, nominal torque minimum 35 Nm.