Watson-Marlow 620R - Manual (Page 6)

Watson-Marlow Bredel E-Manuals
http://www.watson-marlow.co.uk/pdfs-global/m-620r-gb-01.htm[02/02/2012 14:33:33]
620RE, 620RE4 and 620R Tube element or continuous tube removal
Unlock the guard and disengage the rollers.
Disconnect the tubing from the external pipeline.
Remove the tubing from the pumphead.
620RE, 620RE4 and 620R Maintenance
Scheduled maintenance
The stainless steel pumping rollers run on sealed bearings and do not require
lubrication.
Remove the rotor and lubricate the follower rollers and roller engaging mechanisms
with a lithium-based grease. This should be carried out every six months for
intermittent duties and every three months for 24 hour duties.
If fluid is spilled inside the pumphead, flush the pumphead out with water and mild
detergent as soon as possible. If specific cleaning agents are required to clean the
spillage, please consult Watson-Marlow Technical Support Office before proceeding,
in order to confirm chemical compatibility.
If the rotor needs to be removed, refer to the guidelines below.
Roller adjustment
620 pumpheads have provision for adjustment to reset the roller/track gap to compensate
for wear after extended service in arduous applications.
Roller/track gaps can only be accurately judged without tubing in the pumphead. The gap
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.