Watson-Marlow 521CC - Manual (Page 29)

14 520RC, 520R2C and 520REC maintenance

As part of regular cleaning and maintenance (and at least every three months), lubricate
the pivot points, the follower rollers and the tube guide rollers with Ultra Lube (PA 1240),
which is a non-toxic perfluoroether-based grease.

The stainless steel pumping rollers run on externally-sealed bearings and are lubricated
for life.

Check that the pumphead track, rotor, rollers and spring-loaded tube clamps are clean
and operating properly.

If fluid is spilled inside the pumphead it should be cleaned as soon as possible, as
reducing pumphead exposure time to contamination will prolong service life.

To clean the pumphead, remove the rotor as described under Rotor removal, below.
Flush the pumphead out with water and mild detergent, or suitable cleaning agent. Clean
the rotor and rollers in the same way. If specific cleaning agents are required to clean the
spillage, consult the general guide to cleaning with solvents below or Watson-Marlow
technical support office before proceeding, in order to confirm chemical compatibility.
Note: the pumphead guard, rotor cap and clutch boot should be removed in advance of
some cleaning regimes. See the table below. These components are available as spares if
damaged.
 Replace the rotor as described above.
General guide to cleaning with solvents
Always isolate the pump from the mains power supply before opening the
guard or performing any positioning, removal or maintenance activity.
Chemical Cleaning precautions
Aliphatic hydrocarbons Remove guard. Minimise rotor cap and clutch boot exposure
to less than one minute (risk of attack).
Re-lubricate follower and tube guide rollers.
Aromatic hydrocarbons Remove guard. Minimise rotor cap and clutch boot exposure
to less than one minute (risk of attack).
Re-lubricate follower and tube guide rollers.
Ketone solvents Remove guard. Minimise rotor cap and clutch boot exposure
to less than one minute (risk of attack).
Re-lubricate follower and tube guide rollers.
Halogenated/chlorinated
solvents Not recommended: possible risk to polycarbonate tube
clamp adjusters and polypropylene tube clamp locators.
Alcohols, general No precaution necessary.
Re-lubricate follower and tube guide rollers.
Glycols Minimise rotor cap and clutch boot exposure to less than one
minute (risk of attack).
Re-lubricate follower and tube guide rollers.
Ester solvents Remove guard. Minimise rotor cap and tube clamp location
cap exposure to less than one minute (risk of attack).
Re-lubricate follower and tube guide rollers.
Ether solvents Not recommended: possible risk to polycarbonate tube
clamp adjusters and polypropylene tube clamp locators.
Page 29 of 47 Watson-Marlow Bredel E-Manuals
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