Xylem Heavy-Duty Submersible Mixer SR4640.412

Lay the mixer on two supports or suspend the mixer horizontally from an overhead crane.

Place a vessel under the mixer to hold the oil being drained.

Remove the drain plug and the filling plug to facilitate oil drainage.

Re-position the O-ring and the drain plug after oil has been drained.

Tighten the drain plug to the specified torque (10-20 Nm or 7.4-14.8 ft-lbs).

Select the mixer working position for oil quantity

Fill with new oil through the oil filling hole with the mixer in a horizontal position.

Ensure the following tools are available

Twist off the propeller plug and the O-ring

Loosen the hub screw using an M12 hexagon bit adapter (part no 84 14 79), n=10

Replace the cable if the outer jacket is damaged.

Check that the connections to power are properly tightened.

Check that the electrical cabinets are clean and dry.

Measure resistance between earth (ground) and phase lead. Should be more than 5 megohms.

Conduct a phase-to-phase resistance check.

Check that the junction box is clean and dry.

Check the stator housing for any leakage, and drain if necessary.

Check mechanical seals and O-rings and replace any damaged seals with new ones.

CLS (not for Ex-approved mixers)

Check the oil housing for any leakage.

Check mechanical seals and O-rings and replace any damaged seals with new ones.

Check the coolant level (mixer with cooling jacket).

Check the connections and the electrical motor.

Verify power is disconnected to prevent unexpected startup

Remove the inspection screw (marked INSP)

Remove the screw inside to access the stator housing