Sealing Coolant Pump

Self-made tools







Pressing-off disk for impeller







Pressing-in sleeve







1 Fan hub
2 Coolant pump shaft with compact bearing
3 Bearing housing
5 Slide ring seal
6 Counterring
7 O-ring
9 Impeller

Disassembly







1 Press off impeller. For this purpose. place pressing off disk between impeller and bearing housing.







2 Apply light hammer blows at several points between bearing housing and sliding ring seal to cancel the preload and force sliding ring seal out.







3 Force counterring out of impeller.







Assembly
4 Slightly coat mounting bares of sliding ring seal in bearing housing with sealing compound (part No. 001 989 25 20).

Press-in or knock-in sliding ring seal by means of pressing-in sleeve.

Attention!
Support at bearing housing only and not at coolant pump shaft.







5 Coat O-ring on counterring with brake cylinder Paste and push with chamfered side (arrow) into thoroughly cleaned impeller.







6 Clean sealing surfaces of counter ring and sliding ring seal free of dust by means of chamois cloth.
7 Degrease shaft stub of coolant pump shaft and impeller bore.
8 Press-on impeller flush with shaft while supporting coolant pump shaft.