Engine cooling,  OM617

Sealing coolant pump



20—225 Sealing coolant pump


Self-made tools


Pressing-off disk for impeller
om617 - 0437-1.jpg
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
om617 - 0437-2.jpg


20.8-225/1 F 2




1 Press off impeller. For this purpose, place pressing-off disk between impeller and bearing housing.
om617 - 0438-1.jpg


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.
om617 - 0438-2.jpg


3 Force counterring out of impeller.
om617 - 0438-3.jpg


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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.
om617 - 0439-1.jpg


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.
om617 - 0439-2.jpg


20.8-225/3 F 2