7 Servicing/Maintenance
60 of 80
HPK
1121.8/06-EN
CAUTION
Contact of O-ring with graphite or similar material
Fluid could escape!
▷ Do not coat O-ring with graphite or similar material.
▷ Use animal fats or lubricants based on silicone or PTFE.
▪ Assembly adhesives
– For gaskets, avoid the use of assembly adhesives if possible.
– If assembly adhesives are required, use a commercially available contact
adhesive (e.g. "Pattex").
– Only apply adhesive at selected points and in thin layers.
– Never use quick-setting adhesives (cyanoacrylate adhesives).
– Coat the locating surfaces of the individual components and screwed
connections with graphite or similar before reassembly.
– Prior to reassembly, screw back any forcing screws and adjusting screws.
Tightening torques For reassembly, tighten all screws and bolts as specified in this manual.
7.5.2 Installing the bearings
ü The individual parts have been placed in a clean and level assembly area.
ü All dismantled parts have been cleaned and checked for wear.
ü Any damaged or worn parts have been replaced by original spare parts.
ü The sealing surfaces have been cleaned.
WARNING
Hot surfaces due to heating of components for assembly/dismantling
Risk of burns!
▷ Wear heat-resistant protective gloves.
▷ Remove flammable substances from the danger zone.
1. Heat up angular contact ball bearing 320.02 and the inner ring of cylindrical
roller bearing 322.01 to approx. 80°C in an oil bath.
2. Slide angular contact ball bearing 320.02 and the inner ring of cylindrical roller
bearing 322.01 onto shaft 210 until they will not go any further.
NOTE
Angular contact ball bearings must be installed in back-to-back arrangement.
Angular contact ball bearings installed in pairs must always be from the same
manufacturer.
3. Use a C-spanner to tighten slotted round nut 920.21 without lock washer
931.01.
4. Let angular contact ball bearing 320.01 cool down to approximately 5 °C above
ambient temperature.
5. Re-tighten slotted round nut 920.21, then unscrew it again.
6. Apply a few spots of a suitable lubricant (e.g. Molykote) to the contact faces of
lock washer 931.01 and slotted round nut 920.21.
7. Fit lock washer 931.01.
8. Tighten slotted round nut 920.21.
9. Bend back lock washer 931.01.
10. Insert circlip 932.01/932.02 into the bearing bracket.
11. Fit cylindrical roller bearing 322.01 (roller cage) in the bearing bracket.
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