Bunn CDS-3 service manual Auger Shaft Assembly

Page 24

SERVICE (cont.)

AUGER SHAFT ASSEMBLY

Auger Shaft Assy

Auger Shaft Bushing

Cooling Drum Seal

Auger Shaft Seal

Hopper Drum Seal

 

FIG. 5 AUGER SHAFT ASSEMBLY

P1758

 

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, page 12, for proper cleaning procedures. Discard the auger shaft seal, hopper/drum seal and faucet spool o-rings.

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, drip tray (if present) 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 busing surfaces of the cooling drum very thoroughly. All old lubricant must be removed.

10.Refer to Fig 6A and slip new blue bushing into cooling drum. Lightly lube I.D. of bushing with #M2550.0000 “Lubri-film” provided in Kit

#28106.0000 (CDS-2) or #28106.0001 (CDS-3). Do not use anything such as a cotton swab that might leave lint or unravel. DON NOT GET ANY LUBE ON THE SEAL COUNTERBORE SURFACE.

11.Lightly lube I.D. of new cooling drum seal with #M2550.0000, provided in kit. Use care not to get any lube on O.D. of seal. Place seal on insertion tool #28395.0000, as shown in Fig. 6B. Make sure open face of seal is toward cooling drum.

12.Push seal into bore until it is firmly seated; remove tool.

13.Clean the auger shaft assembly, then wipe a small amount of #M2550.0000 “Lubri-film” (provided in kit) over the first two inches of the front end of the shaft.

14.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. 6C. Do not use too much

“Krytox” lubricant.

NOTE - This is the only place “Krytox” lubricant is used.

15.Assemble motor/shaft assembly as shown in Fig. 6C, then install assembly into cooling drum. Make sure the pins do not hit the sensor board and cool- ing drum seal is not dislodged as the shaft passes through.

16.Secure motor and capacitor to the cooling drum mounting bracket. Install rear motor cover.

17.Refer to Initial Setup for hopper assembly and installation procedures. Be sure to use new hop- per/drum seal, auger shaft seal and faucet spool o-rings when reassembling.

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Contents CDS-2 CDS-3 Post Office BOX SPRINGFIELD, IllinoisContents IntroductionUser Notices 12559.0003 00986.000228720.0000 27443.0000 User Notices 27664.0000CDSA-2 Only Site preparation Electrical RequirementsInitial setup Hand Each cooling drum sealAs shown Place Inside of each auger shaftApproximately Operating Controls DAY/NIGHT Timer Setting TimeSetting Night Time Mode Operating ControlsUsing the Dispenser for GRANITA-TYPE Products Using the Dispenser for Cold Liquid ProductsOther Recommendations for Your Dispenser Recommended Daily Cleaning Sugar & Alcohol products Recommended Weekly Cleaning LubricationDisassembly AssemblyLubrication Faucet HandlesAuger assembly & Disassembly Early Augers only Snap it onto the assemblyTroubleshooting Problem Probable Cause RemedyAuger Motor won’t turn Auger ON/OFF Switches Auger Motor Capacitors Refer to Service Auger MotorTime Delay Hopper Display Lights not on Circuit BreakerCompressor not running Power cord Ing procedures. SeeWith adjustment Board L.E.D.s With an extension cord. Refer toProblem Probable Cause Problem Become unusual. Auger MotorsService Component AccessTest Procedures Auger MotorsLocation Auger Motor Capacitor Auger Motor CapacitorsAuger Shaft Assembly Auger Shaft AssemblyService Auger Shaft ASSEMBLYcont Auger ON/OFF Switches Volts ac for 120 volt models Volts ac for 230 volt modelsRemove the wires from the circuit breaker Circuit BreakerDispenser chassis Two wire 230 volt models Connect the black wire from the compressorProperly discharged before proceeding Compressor Start Relay Refer to FIG120V Dispensers Refer to a and reconnect the wires Remove run capacitor and discardCompressor & Components CDS-3 Compressor Thermal P1819 Overload Protector LocationDisconnect the fan leads from the main wiring harness Refer to a and reconnect the wires to the compressorRED from Relay T2 WHI from Relay T4 BLK from Relay T-5 Compressor Relay Terminals Contactor Electronic Control Symptoms Cooling Drum AlignmentDAY/NIGHT Switch Dispenser ON/OFF Switch Dispenser ON/OFF SwitchElectronic Control Electronic ControlUse cable ties to secure wires away from fan blades FANFuse and Fuse Holder Fuse HolderICE/OFF/NO ICE Switches ICE/OFF/NO ICE SwitchesLamp Cord Assy Lamp Cord AssyLamp Cord Connector Upper left side of the auger covers Test ProceduresLamp HOLDER/SOCKET Assembly Inside the hopper coversD./ADJUSTMENT Board E.D./ Adjustment BoardSolenoids SolenoidsTemperature Sensor Temperature SensorTorque Sensor Circuit Board Torque Sensor Circuit Board P1341 LocationTransformer Remove transformer and discardService Voltage DividerCoolant Schematic Diagram CDS-2 Coolant Schematic Diagram CDS-3 Prior to S/N CDSCDS 0019500 Up 27646 27646 Schematic Wiring Diagram for CDS-2 PAF Schematic Wiring Diagram for CDSA-2 PAF 27646 27646 27646
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CDS-3 specifications

The Bunn CDS-3 is a commercial coffee brewer renowned for its reliability, efficiency, and high-quality performance. Designed for busy environments such as cafés, restaurants, and convenience stores, it offers the perfect balance of capacity and functionality, making it ideal for high-demand situations.

One of the standout features of the Bunn CDS-3 is its ability to brew up to 3.8 gallons of coffee per hour. This impressive capacity meets the needs of busy establishments where a constant supply of fresh coffee is crucial. The brewer’s stainless steel construction not only ensures durability but also maintains temperature, thus preserving the coffee’s rich flavor and aroma.

The CDS-3 incorporates Bunn's patented brewing technology, including the "Pour-Over" method. This feature allows for easy operation and contributes to the even extraction of coffee grounds. The machine is equipped with a pre-infusion mode that saturates coffee grounds before brewing, enhancing extraction for a fuller, more complex flavor profile.

Temperature control is another vital characteristic of the Bunn CDS-3. It maintains the water temperature between 195°F to 205°F, the ideal range for optimal coffee brewing. The brewer’s internals are designed for rapid heating, ensuring that the water reaches the desired temperature quickly and consistently, which is essential for high-quality coffee production.

In terms of usability, the Bunn CDS-3 offers an intuitive interface, allowing staff to operate it with minimal training. The front-access design not only simplifies maintenance, but also makes it easy to refill water and perform routine cleaning. Furthermore, the large capacity coffee pots ensure that the brewed coffee can be stored efficiently, minimizing waste.

Equipped with a unique spray head system, the Bunn CDS-3 ensures uniform saturation of the coffee grounds. This feature supports optimal extraction, allowing users to produce a rich and flavorful brew that keeps customers coming back for more.

In summary, the Bunn CDS-3 is a well-engineered, commercial-grade coffee brewer that excels in high-demand environments. Its robust construction, advanced brewing technology, consistent temperature control, and user-friendly design make it a favorite among coffee enthusiasts and professionals alike, affirming its reputation as a reliable and effective solution for coffee brewing needs. Whether for a bustling café or a catering service, the Bunn CDS-3 delivers a consistently great cup of coffee every time.
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