50
12. In case of grease lubrication, remove disc 550.
13. Bend open lockwasher 931 behind nut 920 on shaft 210.
14. Unscrew nut 920 (right-hand thread) and remove lockwasher 931.
15. Heat up angular contact ball bearing 320 and the inner ring of cylindrical roller bearing
322 to 80 °C, and pull them off shaft 210.
16. Dispose of gaskets 400.01/.02.
7.5 Reassembling the pump set
7.5.1 General notes/Safety regulations
Always reassemble the pump in accordance with the corresponding general assembly
drawing.
. Gaskets
– Always use new gaskets, making sure that they have the same thickness as the old ones.
– Always fit gaskets of asbestos-free materials or graphite without using lubricants
(e.g. copper grease, graphite paste).
. O-rings
– Never use O-rings that have been glued together from material sold by the metre.
. Assembly adhesives
– For gaskets, avoid the use of assembly adhesives, if possible.
– Should assembly adhesives be required after all, 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.
For reassembly, tighten all screws and bolts as specified in this manual. ( Section 7.6 Page 54)
7.5.2 Installing the bearings
The individual parts are kept in a clean and level assembly area.
All dismantled components have been cleaned and checked for wear.
Any damaged or worn parts have been replaced by original spare parts.
The sealing surfaces have been cleaned.
C AUTION
Improper reassembly
Damage to the pump!
Reassemble the pump (set) in accordance with the general rules of sound
engineering practice.
Use original spare parts only.
C AUTION
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.
7 Servicing/Maintenance
Sequence
Seal elements
Tightening torques
