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CR/EN (1004) 4.0 Disassembly and assembly 37
CombiPro
7.7 Bearing
7.7.1 Instructions for assembly and disassembly of bearings
➢ First read the following instructions regarding assembly and disassembly. Follow these
instructions closely when assembling and disassembling bearings.
Disassembly:
•Use a proper puller to remove the bearings from the pump shaft.
• If no proper puller is available, carefully knock at the inner raceway of the bearing. Use
an ordinary hammer and a mild steel drift for this.
Never knock at the bearing with a hammer!
Assembly:
• Make sure your working place is clean.
• Leave the bearings in their original packing as long as possible.
• Make sure the pump shaft and the bearing seats do have a smooth surface, free of
burrs.
• Slightly oil the pump shaft and the other relevant parts before assembly.
• Preheat the bearings to 90°C before mounting them on the pump shaft.
• If preheating is not possible: knock the bearing onto the pump shaft. Never knock at
the bearing directly! Use a mounting bush positioned against the inner raceway of
the bearing and a normal hammer (a soft hammer might loose some splinters which
could damage the bearing).
• Always apply a new locking washer (2570) when assembling bearings!
7.7.2 Disassembling bearing
1 Dismantle the impeller and the shaft seal, see paragraph 7.5.1 "Disassembling the
impeller" and paragraph 7.6.2 "Disassembling a cartridge seal".
2 Remove the deflector (2220).
3 Remove the coupling with a coupling puller and remove the coupling key (2210).
4 Remove the deflector (2180).
5 Unscrew the Allen screws (2810 and 2815) and remove the bearing covers (2110
and 2115). Remove the gaskets (2160).
6 Knock at the pump shaft (2200) at the impeller side to loosen the bearings from the
bearing bracket. Use a plastic hammer to avoid damage to the thread.
7 Remove the inner circlip (2300).
8 Knock the lip of the locking washer (2570) out of the lock nut (2560) and loosen the
lock nut.
9 Remove the bearings from the pump shaft.