Watson-Marlow 620U - Manual (Page 89)

Watson-Marlow 620UN, 620U, 620SN, 620S User Manual 89
Track re-location
Ensure that the track is clean.
Align the track so that the location holes are
aligned with the threaded holes in the cased drive.
Tighten the two track retaining screws using a
suitable screwdriver.
Re-connect the waste pipework (if required).
Note: The track can be fitted in two positions: with ports to the right or with ports
down. The ports-down position requires that the pump is positioned at the front of
the surface it stands on to provide clearance for the supply and discharge tubes.
Rotor re-location
Before replacing the rotor, locate the key into the driveshaft keyway and apply
a thin layer of grease over the shaft and key. The rotor keyway is the largest of
the four slots radiating from the driveshaft socket: the top one in the first pic-
ture, above. Align the rotor keyway with 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 cor-
rectly aligned.
Secure the rotor with the hexagonal locating bolt (complete with washer) 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 loca-
tion of the rotor hub to the drive shaft. Failure to complete this action will
invalidate the terms and conditions of the warranty.
Replace the rotor cover.
When closing the guard, check it does not make contact with the rotor. If it does,
the rotor has been fitted incorrectly. Re-open the guard, remove and refit the rotor,
and close the guard.