Culligan M1 Series Installation, Operation And Service Instructions page 38

Pump Replacement
The most common cause of pump failure is inadequate pressure to the pump inlet. Therefore, correct any low inlet pres-
sure problem before replacing the pump to prevent damage to the new pump. Replace the pump when it cannot develop
the pressure required to maintain the desired product flow rate, up to the maximum pump pressure of 150 psig.
To replace the pump:
1. Disconnect power to the unit, then shut off the inlet water supply.
2. Remove the tubing from the pump inlet and outlet.
3. While holding the bottom of the pump with one hand, loosen the screw on the coupling band securing the pump
to the motor. The pump will drop down. Remove the coupling band.
4. Examine the pump shaft. If it is broken or rounded, remove the old shaft and install a replacement shaft, P/N
01000331. Examine the slot in the motor. If the slot is damaged, replace the motor.
5. Remove the plumbing fittings from the old pump, apply fresh Teflon tape, and install the fittings in the new
pump. (Skip this step if replacing only the shaft.)
6. Place the coupling band over the shaft end of the new pump. Insert the pump shaft into the slot in the motor.
7. Observe the alignment of the pump against the motor, making certain the pump and motor flanges are in com-
plete contact and are not skewed.
8. Make sure the clamp is fully seated around the entire circumference of the pump and motor flanges. Tighten the
coupling screw fully, then loosen the screw 1/4 to 1/2 turn.
9. Rotate the pump so that the inlet and outlet ports point to the right. Verify that the pump is still aligned properly
to the motor.
CAUTION! If the pump is not properly aligned, the pump bearings will wear prematurely.
10. Tighten the coupling screw using 15 to 30 inch-pounds of torque, then attach the inlet and outlet.
Motor Replacement
1. Disconnect the pump from the motor as outlined in steps 1-4 in pump replacement section.
2. Disconnect the motor cord from the old motor.
3. Remove the pump and motor assembly from the mounting bracket by removing the four (4) nuts, lock-washers
and washers, holding the motor onto the motor mounts.
4. Mount the new motor onto the motor mounts and secure with nuts and washers.
5. Wire the motor cord connections to the new motor as indicated on the wiring schematic on the motor label for
110 volt operation.
6. Reinstall the pump, fittings and tubing following steps 7 through 10 as outlined in the pump replacement section.
NOTICE Some replacement motors may be prewired for 230 Volt operation at shipment. Refer to wiring
schematic on the motor label and verify that the motor is wired for 110 Volt operation.
34 Culligan® M1 Series Reverse Osmosis
34 Cat. No. 01022940