Bunn AFPO-2 User Manual download pdf (Page 20)

SERVICE (cont.)

VACUUM/SUPPLY PUMP TUBE INSTALLATION

FIG. 24 TUBING START POSITION

P1542

ROLLERS

PUMP

HEAD

TUBING

KEY

ENTRY

PORT

EXIT

PORT

FIG. 25 TUBING LOADED

ROTOR

SHAFT

P1541

28791 040501

2. Separate the two halves of the pump and carefully

remove the tubing from within.

3. Hold the new pump head as shown in Fig. 24, with

rollers in the 2, 6, and 10 o’clock positions.

4. Reinstall tubing in the new pump head by wrap-

ping the tubing around the rollers as shown in Fig.

24.

5. Insert the slot of the tubing key (supplied), as

shown in Fig. 24, on the rotor so the bottom edge

of the key is pressing the tubing into the pump

head cavity as shown in Fig. 25.

6. Hold the tubing and rotor in the pump head and

remove key carefully.

7. Squeeze the pump body and pump heads together

simultaneously until pump body and pump head

are touching on all sides. Be careful not to pinch

the tubing between the pump body and the pump

head.

8. Place the new pump body on the rotor shaft.

9. Replace the four thumbscrews to secure the pump

to the motor assembly. Finger-tighten only.

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Bunn AFPO-2 User Manual Page 20