Xylem Heavy-Duty Submersible Mixer SR4650.31

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

Remove the shaft key, handling it by its ends

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 and fill the required oil quantity

Fill with new oil through the appropriate hole based on mixer position.

Disconnect and lock out power before servicing

Ensure only certified electricians and Xylem-authorized mechanics perform maintenance on EN/ATEX or FM-approved mixers

Verify the following requirements are met

Conduct a check-up by an authorized Xylem service representative

Document findings and determine intervals for periodical inspection and major overhaul

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

Ensure the following requirements are met

Perform general inspection of the mixer

Control and replace wear parts as necessary

Is the outer jacket of the cable damaged?

Replace the cable if the outer jacket is damaged.

Check that the cables do not have any sharp bends and are not pinched.

Check that the connections to power are properly tightened.

Check that the electrical cabinets are clean and dry.

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

Conduct a phase-to-phase resistance check.