Bunn LPG-2, G9WD, G9-2T DBC, FPG-2 SERVICE Cont, DC MOTOR AND GRIND CHAMBER - G1MD ONLY

SERVICE (Cont.)

DC MOTOR AND GRIND CHAMBER - G1MD ONLY

P1706

FIG. 6 DC MOTOR AND GRIND CHAMBER

Location:

The motor is located inside the upper part of the grinder housing.

Test Procedures:

1.Remove the rear panel. Press the red “Reset” button visible on the rear of the motor. Listen care- fully for a “click”. This resets the motor protection circuit and may indicate that something other than

coffee was inserted into the hopper for grinding. If the grinder remains unable to start, proceed to #2. If the grinder stops operating shortly after starting, refer to removal and replacement instructions and inspect for foreign materials.

2.Disconnect the grinder from the power source and place a coffee bag behind the dispense chute.

3.Remove the black wire from the rectifier (+) ter- minal and the red wire from the (-) terminal.

4.Check the voltage across the (+) and (-) terminals with a voltmeter. Connect the grinder to the power source. When the Off/On/Start switch is momen- tarily placed in the “START” (lower) position and then left in the “ON” (center) position and a bag is in place behind the coffee dispense chute. The indication must be approximately 108 volts dc.

5.Disconnect the grinder from the power source.

If voltage is present as described replace the motor. If voltage is not present as described, reconnect the white or red and white/blue wires to the motor, refer to the Wiring Diagrams and check the grinder wiring harness.

Removal and Replacement - Motor (Refer to Fig. 8)

1.Disconnect all wires from the motor.

2.Remove the two .250”-20 screws (1) securing grind selector dial plate and grind selector knob

(2)to the grind chamber. Remove dial plate and selector knob as an assembly.

3.Slide burr (7), auger rotor/spring assembly (3) and burr rotor disc (4) off the grinder motor shaft as an assembly.

4.Remove the two .250”-20 screws (8) securing the stationary burr (9) to the grind chamber.

5.Remove bushing (10) and washer (11) from the grinder motor shaft.

6.Remove the two #8 thread forming screws (12) securing the fill plate (13) to grinder housing and remove plate (13).

7.Remove the four #10-24 screws (14) securing the chute assembly (15) to the grind chamber and remove chute assembly (15).

8.Disconnect all the wires from the rectifier (23).

9.Remove the four .312”-18 screws (20), rubber washers (22) and flat washers (21) securing the motor and bracket to the grinder housing bracket.

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