Dismounting And Remounting; Dismounting The Chuck - Bison 2500 Instruction Manual

6.3 Preparing the chuck for operation
NOTE: When using the special top jaws, the operator should check on (determine) the correct
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jaw clamping force.
To prepare the chuck for operation, please proceed as follows:
■ on the control arbors, mount the parts that work
with proximity switches of the machine tool safety
system,
■ mount the proximity switches that work with chuck
control devices of the machine tool safety system,
■ using the flexible hoses, connect the distributor
ring together with a connector block,
■ mount the top jaws, so that after clamping of the
workpiece, the jaw stroke control device arbor is
in ‚outward' position.
NOTE: After mounting the control tooling and device into the chuck of 2500 type, the machine
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should meet the essential requirements complied in the Machinery Directive 98/37/ WE.
According to the Directive, the manufacturer is the party who has mounted the control tooling and
device and is obliged to issue the WE declaration of conformity.
7. DISMOUNTING AND REMOUNTING THE CHUCK
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NOTE: Any chuck operation work must
be carried out after previous pressure
alignment with the atmosphere in the chuck
chambers.
To align the pressure with the atmosphere in the
chuck chambers, please proceed as follows:
■ disconnect the air supply from the chuck,
■ disconnect the air supply hoses,
■ loosen the pressure control plug (12),
■ loosen the valve cover (9).

7.1. Dismounting the chuck

To dismount the chuck, please proceed as follows:
■ align the pressure with the atmosphere in the
chuck chambers,
■ dismount the chuck from the machine tool with
the crane and an eyebolt,
■ dismount the top jaws,
■ dismount the distributor ring,
■ mounting bolts must be tightened to the specified
torque,
■ perform several clamp/ unclamp test operations,
■ it is recommended to check the jaws clamping force
and adjust air pressure to working conditions,
■ while replacing the jaws, clean the teeth surfaces
thoroughly.
■ place the chuck down in a position preventing its
displacement,
NOTE: Placing the chuck onto the jaws is
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strictly forbidden!
■ unscrew the cover screws (14),
■ remove the cover (5),
■ remove the control pressure distributor,
■ unscrew the valve cover (9),
■ remove the non-return valve (10),
■ place the chuck with jaws facing down on
a special washer, so the jaws can relocate easily,
■ unscrew the adapter plate screws (17),
■ remove the adapter plate screws (6),
■ remove the piston screws (16),
■ remove the cylinder piston (7),
■ unscrew the cylinder baffle screws (15),
■ remove the cylinder baffle (8),
■ remove the drawbar (2),
■ remove the master jaws (3),
■ remove the jaw stroke control device.
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