Wartungs- und Reparaturanleitung
Alphaclassic / Betaclassic
Maintenance and Repair Instruction
1118
1118.0XGB_ 06
Page: 26
6/3 directional valve with switch tray
Please note:
If the 6/3 directional valve has to be replaced ensure that you have also a new switch tray 0799.2212) at
hand – it may be destroyed during replacement work.
Loosen the base casing, lift it and secure it to the table top.
Adjust the column to uppermost position.
Loosen the locking nut (1) .
Unscrew the switch tray (2) .
Remove 4 screws (3), remove the guide plate (4).
Tilt the O. R. table and lay it down on the floor.
Remove the lower base casing.
Mark the position in which the 6/3 directional valve (5) is fixed.
Disconnect all hydraulic lines and stopper them.
Remove 3 fixation screws (6).
Replace the valve.
Assemble in reverse order.
The switch tray must be secured with Loctite.
The valve must be positioned in a way that the switch tray can move freely in all directions. However
there must be no space between the tray and the upper base casing.
The position can be corrected in that the fixation screws are loosened and the valve is moved laterally.
Please note:
Always use new sealing rings.
Check the oil level.
Actuate all functions several times and move them to their final positions (see “bleeding”).
5.5
