Bunn AF PR-3 - Manual (Page 14)

14
SERVICE (cont.)
VACUUM/SUPPLY PUMP TUBE INSTALLATION 1. Separate the pump head from the pump body.
Hold pump head as shown in Fig. 18, with roller in
the 2, 6 10 o’clock positions.
2. Wrap tubing around rollers and hold as shown in
Fig. 18.
3. Insert the slot of the tubing key (supplied), as
shown in Fig. 18 on the rotor so the bottom edge
of the key is pressing the tubing into the pump
head cavity.
4. Push down and turn the key counterclockwise to
guide the tubing deep into the pump head cavity as
shown in Fig. 19.
5. Hold the tubing and rotor in the pump head and
remove key carefully.
6. Place pump body on the rotor shaft.
7. Squeeze the pump body and pump head 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.
FIG. 18 TUBING START POSITION
P1542
ROLLERS
PUMP
HEAD
TUBING
KEY
ENTRY
PORT
EXIT
PORT
FIG. 19 TUBING LOADED
ROTOR
ROTOR
SHAFT
P1541
28791.1 011500