Bunn -O-MATIC ULTRA-1 - Manual (Page 25)

25
SERVICE (cont.)
AUGER SHAFT ASSEMBLY
Auger Shaft Assy
Auger Shaft Bushing
Cooling Drum Seal
Hopper Drum Seal
FIG. 5 AUGER SHAFT ASSEMBLY
Location:
The Auger Shaft Assembly is located in each of the
cooling drums.
Removal and Replacement:
1. Drain, remove and clean hopper; refer to the Rec-
ommended Daily Weekly Cleaning Section of this
manual, for proper cleaning procedures. Discard
the hopper/drum seal and faucet seal.
2. Remove the #8 locking screws securing auger
motor cover to the cooling drum mount assembly;
remove cover and set aside for reassembly.
3. Remove the #8 locking screw on the lower right side
(viewed from front) of the auger motor mounting
bracket securing the auger motor run capacitor. Set
capacitor aside with wires attached.
4. Disconnect the auger motor terminal from the
terminal on the main wiring harness.
5. Remove the remaining #8 locking screws securing
the auger motor mounting bracket to cooling drum
mounting bracket.
6. Remove motor with mounting bracket, split pin and
torsion spring bearing as an assembly.
NOTE - When removing or installing motor and shaft
assemblies, be sure the split pins are turned to a posi-
tion that will clear the torque sensor circuit board.
7. Pull the auger shaft assembly straight out of cool-
ing drum. Inspect the shaft for abnormal wear or
scoring.
8. From the front of dispenser, remove the seal and
blue bushing from cooling drum and discard
them.
9. Clean seal and bushing surfaces of the cooling
drum very thoroughly.
10. Refer to Fig 6 and slip new blue bushing into cooling
drum.
P1758
FIG. 6 AUGER SHAFT BUSHING
Blue bushing
Do NOT get any Lube on this surface
(between Drum and Bushings/Seals)
P1759
Auger Motor Cover
Run Capacitor
Auger Motor Assy
Ceramic Coating
Cooling Drum
11. Place seal on insertion tool #28395.0000, as shown
in Fig. 7. Make sure open face of seal is toward
cooling drum.
12. Push seal into bore until it is firmly seated; remove
tool.
13. Place a small amount of #29563.0000 “Krytox”
lubricant (provided in kit in a plastic cap) on the
end of the motor shaft (about 1 1/2”) and a thin
film in the groove. Install auger shaft assembly onto
the motor shaft. See Fig. 8. Do not use too much
“Krytox” lubricant.
NOTE - This is the only place “Krytox” lubricant is
used.
41084 102709