7 | Cleaning and servicing
BÜCHI Labortechnik AG
40/52
Operation Manual Vacuum Pump V-100
7.2.5
Replacing tubing
3
4
1
1
2
Fig. 25: Pump-head connection piece with GL-14 union nuts between the two pump heads
1 Screws for connections
3 Pump-head connection piece
2 Elbow connection
4 GL14 cap nut
Precondition:
R
Pump has been shut down.
u
Unscrew the two knurled-head screws and remove the pump top cover.
u
Unscrew two screws (1) from each elbow connection (2).
u
Remove the two elbow connections together with the pump-head connection piece
(3) from the pump heads.
u
Unscrew the GL14 cap nuts (4) on each end of the pump-head connection piece
counter-clockwise and remove the connections (2).
u
Pull the GL14 cap nuts off the pump-head connection piece.
u
Feed a new pump-head connection piece through the union nuts.
u
Screw the GL14 cap nuts onto the connections. Make sure that the FEP pipe
seals under the GL14 cap nuts are in proper contact with the pump-head connec-
tion piece and are not damaged.
u
Fit the connections together with the pump-head connection piece on the pump
heads.
u
Refit the pump top cover and fix in place.
