Manuals / Bunn / Kitchen Appliance / Beverage Dispenser

Bunn CDS-3 service manual Auger Shaft Assembly

Models: CDS-3

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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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Bunn CDS-3 service manual Auger Shaft Assembly
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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.