Walther prazision 91489, Working Instruction

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Working instruction
english
typ 91489
Works on malfunction
and damages
40
10.5.2 Repair of cooling water elements
Adaptor element 1-EC-010-2-XX...-....-Y13 (robot side) housing and valve seal
1. Unscrew fillister head screw item 29 with hexagon socket screw key SW4 and
then take it off.
Caution:
Strong valve spring item 24 drives valve piston item 22
and valve plunger item 21 out of the housing – hold fast!
2. Take out all valve parts and valve spring.
3. Pull out shaft circlip item 28 with a suitable tool from the groove and then take it off.
4. Slide valve washer item 23 from valve plunger item 21 and take out old seal item 26.
5. Clean sealing surfaces and check them for mechanical damages.
6. Grease new seal and slide it onto valve plunger.
7. Slide on valve washer und shaft circlip onto valve bolt and place shaft circlip into
the groove until it snaps in.
8. Remove old housing seal item 25 with suitable tool out of the groove.
9. Clean sealing groove and check it for mechanical damages.
10. Grease new seal and insert into sealing groove.
11. Do not twist or damage seal during insertion.
12. Clean grease chamber in adaptor housing and fill it with new grease;slightly grease sliding
surface for valve piston.
13. Check bottom seal item 27 for damages and exchange/grease it if necessary.
14. Clean thread of the fillister head screw item 29 and then apply adhesive Loctite 242 to it for
safety reasons.
15. Insert valve plunger (with new seal), valve piston and valve spring into housing and press
valve spring so far until valve plunger sticks in the bore of the housing bottom.
16. Screw in fillister head screw. In doing so hold up valve plunger and draw up fillister head
screw with hexagon socket screw key SW4
Torque = 4 Nm