Bunn -O-MATIC ULTRA-1 Service And Repair Manual page 13

REQUIRED REGULAR MAINTENANCE (Continued)
6. Pull the auger shaft assembly straight out of cooling drum.
Inspect the shaft for abnormal wear.
7. From the front of dispenser, remove the seal and blue bushing
from cooling drum and discard them.
8. Inspect inside of the coling drum from the rear for product
leakage and clean thoroughly with an extended bristle brush
(Bunn part no. 40500.1068) and warm sanitize solution, rinse
and dry with a towel. Clean the front seal/bushing area of the
cooling drum thoroughly with the bristle brush. Refer to Fig. 4
for areas to be cleaned.
9. Refer to FIG 1, and slip new blue bushing into cooling drum.
10. Place seal on insertion tool #28395.0000 as shown in FIG 2.
Make sure open face of seal is toward cooling drum.
11. Apply a small amount of food grade lubricant (Bunn
#M2568.1000) to inside diameter of seal. Push seal into bore
until it is firmly seated; remove tool.
12. 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 / ") and a thin film in the groove. Install auger shaft
1
2
assembly onto the motor shaft. See FIG 3. Do not use too much
"Krytox" lubricant. Dirt or grease on pins will cause "optical"
misreading by torque sensors.
NOTE: This is the only place "Krytox" lubricant is used.
13. Assemble motor/shaft assembly as shown in FIG 3, then install
assembly into cooling drum. Make sure the pins do not hit the
sensor board and cooling drum seal is not dislodged as the
shaft passes through.
14. Secure motor and capacitor to the cooling drum mounting
bracket. Install rear motor cover.
15. Refer to the hopper assembly and installation procedures. Install
new hopper/drum seals and faucet seals included in the kit. See
FIG 1 & 5.
16. Remove and clean condenser air filter. See FIG 6.
17. Refer to the Programming Manual, "Menu Function Index".
Scroll to menu "PM Complete?" and answer "YES" to reset
the reminder message "PM Due".
Hopper/Drum Seal
Cooling Drum
Auger Shaft Bushing
Cooling Drum Seal
FIG 4
Inspect & Clean
Faucet Seal
Open face of seal
away from tool
Cooling Drum Seal
Seal Insertion Tool
Lube about 1
groove with #29563.0000 "Krytox"
Lubricant
P3695
FIG 5
13
P1760
FIG 2
Check for weak
torsion springs
Pins
Auger Shaft Assy
/ " of shaft and in the
1
2
P2529
FIG 3
FIG 6
P3682
41084 102709