Moyer Diebel MH-6LM3, MH-6NM3, MH-60M3 Mechanical Service, Pump Seal Replacement, Basic Service

BASIC SERVICE

MECHANICAL SERVICE

Pump Seal Replacement

1.Disconnect the power to the machine at the main breaker panel or fuse box.

2.Drain the machine.

3.Remove the front and side panels.

4.Remove drain plug on the pump volute and drain the pump.

5.Remove the pump hoses.

6.Disconnect the wires to the motor at the motor junction box.

7.Unbolt motor from machine base and remove the pump/motor assembly.

8.Remove bolts on volute and carefully remove from the pump flange.

9.Remove the impeller retaining bolt and nut from center of impeller.

10.Lock the motor shaft with a wrench or pliers. The back of motor shaft is square.

11.Turn the impeller counter-clockwise to remove from shaft (right hand threads).

12.Remove the old seal and discard.

13.Check seal seat in the pump flange and clean thoroughly.

14.Press rubber seal/ceramic portion of seal assembly into the pump flange. Use a water soluble lubricant. Be careful to keep the ceramic clean.

15.Install the rotating part of the seal on the shaft with the graphite surface toward the ceramic. Use a water soluble lubricant on the rubber seal part only (not the graphite).

16.Reinstall impeller, and new flange gasket. Reinstall bolts. Reinstall drain plug.

17.Reinstall the pump/motor assembly and reconnect the pump hoses.

18.Fill the dishwasher with water.

19.Check motor rotation by bump starting motor.

Correct motor shaft rotation is clockwise when viewing motor from the rear.

20.Test run and check for leaks.

Pump Flange

Gaskets

Impeller Volute

Washer

Seal Assy.

Water

Slinger

Backing Plate

Backing Plate Mtg. Nut

Bolt

(B)

Nut

Plug

Bolt

(A)

Figure 21

Pump Seal Replacement

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