LEVER MECHANISM OF A SUPERFINISHING HEAD DRIVE

When the hydraulic motor is switched on, fluid under pressure is delivered to spools 1 and 2. A part of the fluid, passing through a groove of pilot spool 2 and passage 5, is delivered to the left end of main spool 1, holding it in the right-hand position. The main stream of fluid passes through another groove of spool 2 and passage 6 to the right end of motor cylinder 7, moving piston 3 to the le…