Carver Inc 4-2
4.2 OPERATING THE HYDRAULIC PRESS
Before attempting to operate the hydraulic unit, make certain that the release valve screw is closed finger tight.
IMPORTANT: DO NOT rotate the release valve more than one full turn in the counterclockwise direction.
30-ton (267 Kn) models are equipped with a lever rather than a knob. The cam release lever should be in the vertical
position before the press is closed.
Opening the release valve approximately one-half turn releases the pressure and allows the platen to open. The release
valve is equipped with a mechanical stop to prevent the valve from being turned out to far. Pulling the cam release lever
toward the operator to the horizontal position will allow the clamp on 30-ton (267 Kn) models to open. It may be
necessary to push the platen down by hand when the press is new. After a short period of use, the platen will return
under its own weight.
Please keep in mind that no hydraulic unit will maintain constant pressure without some additional pumping. This is
especially true when pressing against a soft or yielding material. Some pumping is required to offset normal packing
leakage. After the desired pressure is obtained, an occasional stroke or two will normally maintain the pressure.
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