Buchi V-600 - Replacing O-Rings

BÜCHI Labortechnik AG Cleaning and servicing | 7
Operation Manual Vacuum Pump V-600 53/65
7.2.6 Replacing O-rings
The O-rings have to be replaced if the V-600 is no longer functioning to full capacity
and no longer achieving the terminal vacuum. In such cases, it makes sense to re-
place all eight O-rings in the elbow connectors on the pump heads (see Chapter7.2.4
"Replacing the non-return valve", page48).
1
3
4
2
Fig.33: Connecting components, elbow connectors and O-rings inside V-600
1 O-ring 3 Elbow connector
2 Fixing screws for elbow connector
u Remove the casing front, see Chapter7.2.2 "Dismantling and reassembling pump
head", page43.
u Remove the elbow connectors (3) together with connecting components, see
Chapter "Step 1: Removing connecting components", page44.
u Remove the old O-rings (1) together with the non-return valves from the elbow
connectors. Use the diaphragm grips to do so., Chapter7.2.7 "Removing non-re-
turn valve from elbow connector", page54.
u Insert new O-rings together with non-return valves in the elbow connectors.
NOTICE!When inserting the valves, pay attention to the symbols on the
pump heads! The two valves on each pump head are inserted the opposite
way round from each other.