Watson-Marlow 624Di - Manual (Page 16)

Watson-Marlow Bredel E-Manuals
http://www.watson-marlow.it/pdfs-global/m-624Di-gb-01.htm[10/07/2012 13:59:15]
should be 4.6mm for 3.2mm wall tubing and 5.5mm for LoadSure elements.
If the gap is more than 0.2mm greater than these dimensions, the following may be
carried out:
Note the number on the roller arm to which the engraved line on the hexagon-
headed main roller pin corresponds.
Remove the circlip (snap-ring) and roller pin.
Relocate the main roller pin, resetting the engraved line to one number lower. For
example, if the engraved line was at "-1", reset it to "-2" to reduce the roller track
gap.
Ensure the roller pin is correctly seated into the roller arm thrust washer. Replace
the circlip.
Rotor removal and re-location
Remove the rotor cover and central locating bolt using a 5mm Allen key. Pull the
rotor off the keyed shaft, remove the key and clean thoroughly. Do not use tools to
lever the rear face of the rotor away from the inner face of the track, it should come
off by hand.
To replace the rotor, locate the key into the keyway and apply a thin layer of grease
over the shaft and key. Align the keyway of the rotor to the shaft key and slide the
rotor into position, ensuring that a positive "stop" is achieved and ensure that the
full length of the drive shaft is fitted into the rotor.
Do not force the rotor into position. The rotor will slide into place easily if correctly
aligned.
Tighten the hexagonal locating bolt to a nominal torque of 10Nm using a 5mm Allen
key.
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.
Replace the rotor cover.
When closing the guard, check it does not make contact with the rotor. If it does, then the
rotor has been fitted incorrectly. Re-open the guard, remove and refit the rotor, and close
the guard.