Cincinnati Hydraulic Press Brake 230CBX12

Check ram guide clearances – relevel if necessary

Adjust swivel end guide bearings

Remove six screws and lift out strainer unit

Backflush strainer with solvent

Power to machine turned OFF and disconnect switch on main electrical enclosure LOCKED

Cover and old servo valve removed from servo valve housing

Feeler gage measurement between servo valve anchor collar and servo valve housing

Locknuts installed on servo valve stem located at bottom of servo valve

New servo valve bolted in place

Adjustment of valve spool with adjusting nuts to obtain .188\ +.005 dimension"

Parallelism of bed and ram checked and adjusted if necessary

Run ram to the maximum down position and block both ends of the ram

Turn OFF machine and LOCK the electrical disconnect

Remove ram pin cover plate on front of ram using extractor bar

Swing cylinder out from ram and insert wooden block between cylinder and housing so piston rod is clear of ram

Remove 6 or 8 bolts from seal retainer and insert 3 or 4 3/8\ x 1\" (or longer) set screws into tapped holes in retainer. Tighten set screws to back-off retainer"

Support retainer to keep from falling free and remove seal retainer

Remove seal from groove in bore of seal retainer. The seal has an energizing \o\" ring to pre-load the seal"

Replace with a new seal. Also inspect non-metallic bearing strip in bore of seal retainer and \o\" ring seal in top face of retainer. Replace if necessary"

Using auto body slide hammer-puller, remove the piston rod seal. This seal has no energizing. Be careful not to damage finished surface of piston rod or lower head seat

Block the ram so it is parallel to bed

Turn OFF all power to the machine and lock the electrical disconnect

Remove the old leveling band and cut the new band to the same length as the old one

Attach the new leveling band to the anchor point on the adjusting knob screw

Pass the leveling band over the sheaves and through the protective tube on the rear of the ram

Attach the left end of the leveling band to the servo valve anchor, pulling the band as tight as possible

Tighten the band by turning the tilt adjusting knob (clockwise) until .040\ clearance is provided between the servo valve anchor collar and the bottom of the servo valve mounting block. This is the zero point or neutral position for the servo valve"

The tilt adjusting knob screw should be recessed approximately 5/8\ (+1/8\") from the end of the knob when the servo valve is in the neutral position"

Check the level of the bed and ram per the previous instructions