Sealing coolant pump

Self-made tools

Pressing-off disk for impeller

Pressing-in sleeve

1    Fan hub                                 5   Slide ring seal

2   Coolant pump shaft with     6   Countering compact bearing                   7   O-ring

3   Bearing housing                    8    Impeller

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.

4 Slightly coat mounting bores 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.

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

20.8-225/2 F 2

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

120 -10863

6   Clean sealing surfaces of counterring and sliding ring seal free ob 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.

20.8-225/3 F 2