Watson-Marlow SP Series - Manual (Page 23)

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• Pre-grease bearings with lithium grease.
• Use arbor press and press new bearings on shaft. Coat shaft areas with anti-seize
compound to facilitate assembly.
• Press oil seal into housing.
• Insert joint ring into bearing cover groove.
• Press shaft assembly into housing.
• Add grease through grease fitting and fill housing cavity until grease is forced through
the exposed front bearing. Then take away grease nipple and plug the hole.
• Assemble bearing cover to housing to secure shaft assembly for SP/25 to SP/100.
Assemble safety ring and press in joint ring for SP/10, SP/15 and SP/20.
• Place rotor key and assemble rotor. Secure with retainer ring.
• Check the cover O- ring for damage and replace if necessary. Refit the cover. Make
sure that the bolts are refitted and that they are tightened in the correct order,
diagonally opposite each other, see “Specifications”: ‘Torques”, § 10.1.6.
• Switch on the electrical supply to the pump.
• Fit the (new) pump hose, see 7.5.9 through 7.6.5
7.8 Hose compression force adjustment (shimming) (not applicable for SP/10, SP/15
and SP/20).
Fitting and removing shims is a simple action which can be carried out via the inspection
window on the front of the pump housing. The pump hose or the pump cover does not need
to be removed. In order to determine the correct number of shims for your specific
application see “Specifications”: “Shimming”, § 10.1.7.
CAUTION
Too many shims, this means a too high compression force on the pump hose,
will create a too high load of the pumphead and pump hose, which may result in
a reduction of the life of the pump hose. Too few shims, this means a to low
compression force on the pump hose, create a loss of capacity and backflow.
Backflow results in a reduction of the life of the pump hose.
• Jog the motor until the pressing shoe is positioned in view of the inspection window.
• Isolate the pump from the electrical supply.
• Loosen the retaining bolts of the inspection window and remove the bolts.
• Remove the inspection window. Care must be taken not to damage the gasket.
• Loosen the retaining bolt(s) of the pressing shoe a few turns.
• Fit the shims or remove them until the correct number of shims is present (see
“Specifications”: “Shimming”, § 10.1.7). To aid in assembly, preform shim around
rotor. Then insert with slot oriented around bolt.
• Fasten the retaining bolt(s) of the pressing shoe with the correct torque (see
“Specifications”: “Torques”, § 10.1.6).
CAUTION
When maximum suction capability is required, the pump shimming must be as
for minimum 5 bar counter pressure at corresponding speed.