Bunn G1 Operating & Service Manual - page 12
12
SERVICE (cont.)
3. Remove the two .250”-20 screws (1) securing
the grind selector dial plate (18) to the grind
housing.
4. Slide burr auger rotor/spring assembly (3) off of
the grinder motor shaft with burr rotor cup (5),
shear plate (4) and burr (7) as an assembly.
5. Remove burr rotor cup (5) and shear plate (4)
from burr auger rotor/spring assembly (6). In-
spect shear plate (4) for wear. Replace if exces-
sively worn or damaged.
6. Remove the two .250” screws (20) securing
burr (7) to burr auger rotor/spring assembly (6)
and remove burr (7). Inspect burr (7) for wear.
Replace if excessively worn or damaged.
7. Remove the two .250”-20 screws (8) securing
the stationary burr (9) to grind chamber hous-
ing and remove burr. Inspect for wear. Replace
if excessively worn or damaged.
NOTE: Burrs are serviced in sets of two with hard-
ware.
FIG. 6 GRIND CHAMBER COMPONENTS
P1708
8. Clean all grinding burrs and mounting surfaces
before reassembly.
9. Remove bushing (10) and shaft extension (11)
from grinder motor shaft. Inspect for wear. Re-
place if excessively worn or damaged.
10. Install shaft extension (11) and bushing (10) onto
the grinder motor shaft.
11. Install stationary burr (9) inside the grind cham-
ber and secure with two .250” -20 screws (8).
12. Install burr (7) on burr auger rotor/spring as-
sembly (6) securing with two .250”-20 screws
(20).
13. Slide burr auger rotor/spring assembly and burr
(3) onto the motor shaft.
14. Align the slot in the shaft extension and the slot in
the burr auger rotor/spring assembly and install
shear plate (4).
15. Install burr rotor cup (5) onto the burr auger ro-
tor/spring assembly (6).
16. Install the adjusting screw w/bearing (19) into
the grind selector dial plate (18).
20 7 6 4 5
16
18 1 19 17
11 10 9 8 3
2 1
13
7
12
14
15
AC MOTOR AND GRIND CHAMBER (cont.)
10191 011500