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Any nicks or scratches to the surface will allow hydraulic oil to leak from the Cylinder when the tool is reassembled. 6. Sprag the flat end of the piston shaft against rotation and using a socket on the hex of the piston head, -10 unscrew and remove the piston head from the shaft with the Piston O-ring (17). 7. Pull the Piston shaft out of the Housing. 8. If the Sliders (5) must be replaced, position the Slider Pin (14) over a clearance opening in a soft block and use a small drift to tap the P