Bunn G9-2T DBC - Manual (Page 22)

22
SERVICE (Cont.)
P1022
Location:
The motor is located inside the hopper assembly.
Test Procedures:
1. Disconnect grinder from the power supply.
2. On Model LPG-2E, disconnect the black wire and
the white wire to the motor from the main wiring
harness, the red wire to the circuit breaker and the
red wire to the Off/On/Start switch. On Model LPG
disconnect the motor wiring harness from the main
wiring harness.
3. Connect the leads of an ohm meter to the red wires
from the motor.
If continuity is present the overload is good.
If continuity is not present the overload will not reset,
replace the motor.
4. Set an ohm meter to read at least 20 ohms. Connect
the leads from the ohm meter to the black wire and
the white from the motor. The ohm reading should
be approximately 18 ohms. Using the bean agitator
slowly rotate the motor shaft in approximately 1/8
turn steps through one full rotation. If ohm readings
are consistent motor windings are good. If readings
vary more than ±1 ohm, replace motor.
NOTE: Clean all grind burrs and mounting surfaces
before reassembly.
FIG. 9 MOTOR
Removal and Replacement:
1. On Model LPG-2E, disconnect the black wire and
the white wire to the motor from the main wiring
harness, the red wire to the circuit breaker and the
red wire to the Off/On/Start switch. On Model LPG
disconnect the motor wiring harness from the main
wiring harness.
2. On Model LPG-2E, disconnect the red wire from
the left and right solenoid, the orange wire from
the left solenoid and the violet wire from the right
solenoid.
P1049
2
3
1
FIG. 10 MOTOR REMOVAL
3. Refer to Fig 10. Remove the three #10-32 x .25”
screws (1) securing the motor to the motor support
bracket.
4. Remove the motor, solenoid and solenoid com-
ponents (2) from the hopper housing (3) as an
assembly.
NOTE: Steps 5 thru 12 apply only to Model LPG-2E.
5. Refer to Fig.11. Remove the three #8-32 Keps
nuts.
6. Lift the retaining ring w/hopper gasket (1) over the
motor and burr housing assembly (6). Set aside for
reassembly.
7. Lift slide plate, solenoid plunger and spring (2) off
of the dowel pin in the mounting ring and slide
solenoid plunger and spring (2) out of solenoid
coil. Set aside for reassembly. Repeat for opposite
side.
MOTOR (Models LPG & FPG)
41545 122209