Handbook

D. Seal Replacement
REMOVAL:
1. Turn off the power to
the pump.
2. Remove the volute bolts
and volute.
3. Remove the motor shaft cap
at the back of the motor and
secure the shaft.
4. Spin off the impeller.
5. Remove the bracket bolts
and bracket.
6. Remove the white ceramic
seal and rubber cup ring from
the impeller.
7. Tap the seal out of the bracket
and remove any silicone from
the seal pocket.
INSTALLATION:
1. Support the seal pocket in the
bracket with 1 inch PVC cou-
pling or 1-1/2 inch PVC pipe (at least 2-5/8 inch long).
2. Coat the stainless steel seal retainer with rubber silicone sealant.
3. Tap the seal into place using 1 inch PVC coupling or 1-1/4 inch PVC pipe.
4. Press the white ceramic seal into the impeller. Be careful not to touch
the seal face.
PROBLEM: Lack of pressure.
SOLUTION:
1. Verify that the booster pump is correctly installed (motor is wired for
proper voltage) and receiving supply water; it is not self-priming. (Refer to
page 42 for installation basics.)
2. Verify that there are no leaks at the inlet or outlet of the pump.
3. Check the pump hose washers for swelling (old style black hoses).
4. If there is a valve installed on the discharge side of the pump, verify that
the valve is open.
5. Check the impeller for foreign material.
6. Verify that the booster pump discharge is plumbed into the dedicated
cleaner line rather than a normal return line.
PROBLEM: Motor runs then shuts off.
SOLUTION:
1. Verify that the cleaner is connected when the pump is running.
2. Check the amperage and voltage levels. Refer to the motor label.
3. Install a pump pressure restrictor (part #P-53) or a valve on the discharge
side of the booster pump.
4. Ensure that the motor vents are free from debris and receiving
sufficient ventilation.
5. See solutions under “Lack of pressure” problem.
PROBLEM: Motor hums, but does not turn.
SOLUTION:
1. Turn off the power to the pump.
2. Spin the shaft by hand. If it turns freely, there is a motor or
electrical problem.
3. If it does not turn:
• Disassemble the volute.
• Check the impeller for foreign material.
• If the impeller or volute are damaged from contact, remove and
replace them. Then reset the impeller distance if it is a keyed shaft
motor with a brass shaft extension. The impeller should be about
1/8 inch from the bracket face.
1" PVC Coupling or
1-1/4" PVC Pipe
Seal
1" PVC Coupling or
1-1/2" PVC Pipe
Bracket
Flat Surface
Bracket
Rubber
Mallet
1" PVC Coupling or
1-1/4" PVC Pipe
1" PVC Coupling or
1-1/2" PVC Pipe
4544