Xylem Heavy-Duty Submersible Mixer SR4680.310

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.

Ensure the vessel can hold less than 2 L (2.1 qt) of oil.

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 a torque of 10-20 Nm (7.4-14.8 ft-lbs).

Determine the required oil quantity based on mixer position

Disconnect and lock out power before servicing

Is the mixer EN/ATEX or FM-approved?

If EN/ATEX or FM-approved, ensure only certified electricians and Xylem-authorized mechanics perform maintenance

Check that the following requirements are met

Perform general inspection of the mixer

Control and replace wear parts as necessary

Replace the cable if the outer jacket is damaged.

Check that the connections to power are properly tightened.

Ensure electrical cabinets are clean and dry.

Measure resistance between earth (ground) and phase lead (should be > 5 megohms).

Conduct a phase-to-phase resistance check.

Ensure the junction box is clean and dry.

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

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.