Watson-Marlow 620RA User Manual page 16

Locate the drive shaft key into the key way and apply a thin layer of grease over the shaft and key.
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Align the keyway of the rotor to the shaft keyway (1) and slide the rotor into position to achieve a
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positive "stop".
Note: Do not force the rotor into position, the rotor should slide into place easily if correctly aligned.
Ensure that the full length of the drive shaft is fitted into the rotor.
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Note: The rotor bolt, which is impregnated with "Loctite 218" thread lock, should be subjected to a
maximum of three removals/relocations before renewal. To avoid rotor bolt renewal after three
removals, apply "Loctite 222" thread lock to the rotor thread before relocation. This is critical to ensure
prolonged, secure location of the rotor hub to the drive shaft. Failure to complete this action will
invalidate the terms and conditions of the pumphead warranty.
Tighten the hexagonal locating bolt to a torque of 10Nm using a suitable 5mm Allen Key. (2)
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Replace the Rotor cap/cover (3).
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Test the resistance of the Earth Bonding between a metal point on the rotor assembly and a
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conductive part of the motor (5). The resistance must be <1MΩ.
1.
4.
DANGER! - EXPLOSION HAZARD
Explosion hazard due to foreign metallic objects rubbing within
pumphead. Loose screws, fixings or tools in the pumphead may cause
rubbing. Pumphead must be inspected and any foreign objects or
loose items removed before operation.
WARNING!
Risk of injury due to expulsion of foreign object. Before commissioning
ensure no debris or metallic objects for example loose fastenings, are
present in the pumphead.
PB0347:m-620atex-en-03
2.
5.
3.
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