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32
TUBE REPLACEMENT – SINGLE HEAD
Adjustable & Fixed Output Pumps
PREPARATION
1.
Follow all safety precautions prior to tube replacement.
2.
Prior to service, pump water or a compatible buffer solution through the pump and
suction and discharge lines to remove chemical and avoid contact.
REMOVE THE PUMP TUBE
1.
Turn the pump off and unplug the power cord. On the adjustable model, ensure that the
feed rate control is set to 10.
Illustration A p30
2.
Depressurize and disconnect the suction and discharge lines.
3.
Open the back and front of the latches on both sides of the head.
Illustration B p30
For CE pump only: Remove the safety screw on cover.
4.
Remove the tube housing cover and flip to use as a tool in the next step.
Illustration C & D p30
5.
Align the center of the inverted cover with the center of the roller assembly so that the
three holes on the face of the cover align with the three knurled lugs on the roller
assembly. Position the cover feet near the tube fittings.
Illustration E p30
NOTE: The roller assembly needs to be collapsed to remove the tube.
6.
On the adjustable pump, hold the feed rate control securely. On the fixed output pump
hold the pump securely. Use the tube housing cover as a wrench and quickly (snap)
rotate the cover counter-clockwise to collapse the roller assembly. The tube will no longer
be pressed against the tube housing wall.
Illustration F p30
NOTE: Counter-clockwise is viewed from facing the head of the pump.
7.
Remove and discard the pump tube.
Illustration G p30
8.
Remove the roller assembly, and the tube housing. On the adjustable pump also
remove the shaft. Set them aside to reinstall later.
9.
Use a non-citrus all-purpose cleaner to clean chemical residue from the tube housing,
roller assembly and cover.
10.
Check the housing for cracks and replace it if it is cracked.
11.
Ensure the rollers turn freely. Replace the roller assembly if the rollers are seized or
worn or if there is a reduction or lack of output from the pump.
Illustration H p30
12.
Reinstall the clean tube housing. On an adjustable pump, also install the shaft.
13.
Apply AquaShield
®
to the shaft tip.
14.
Install the roller assembly.
