7 Servicing/Maintenance
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CTN / CTN-H
– 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 made by cutting an O-ring cord to size and
gluing the ends together.
▪ Packing rings
– Always use pre-compressed packing rings.
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 alignment screws.
Tightening torques For reassembly, tighten all screws and bolts as specified in this manual.
7.5.2 Fitting the bearing sleeve
Fitting the bearing sleeves
1.4122HB500 and 1.4571 Bearing sleeve made of 1.4122HB500 and 1.4571 (standard design)
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 corrected or replaced with 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 the bearing sleeve to approx. 150 to 200°C and slide quickly onto the
shaft.
SiC Bearing sleeve made of SiC (standard design)
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 corrected or replaced with original spare
parts.
ü The sealing surfaces have been cleaned.
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