Hook Mount (HM) Replacement

Magnum Rotary Platemakers:

  • Disconnect Power To The Machine!
  • Remove the 2 GAS CYLINDERS that hold up the GLASS FRAME. Loosen the HINGE MOUNTING SCREWS (2 or 3 Socket Head Cap Screws ALLEN) located in the left & right rear of the vacuum frame. Only loosen them ¼”, if removed too far, a NUT-PLATE will fall free inside the vacuum frame and the vacuum platen will have to be removed in order to access and replace. Remove the GLASS FRAME and store in a safe place.
  • Remove the old blanket retainers, lift the blanket and remove the hose from the fittings. (Be careful not to allow the hoses to retract into the Vacuum Frame). Remove the blanket.
  • Replace the VACUUM FILTER. On some models it can be pulled out through one of the holes in the VACUUM PLATEN. On other models the VACUUM PLATEN must be removed. Remove the old VELCRO or CORK spacer around the perimeter of the vacuum frame. Install the pre-punched CORK SPACER over the platen mounting screws. Install the 2 long on the front and back, and the 2 short on the left and right.

STANDARD VACUUM SYSTEM ONLY:

  • Reposition the ¼” FOAM mat so it is centered on the frame. Position the new BLANKET so that it is centered on the frame. Attach the VACUUM HOSES to the fittings. Position the HOOK MOUNT (HM) BLANKET RETAINERS on the BLANKET perimeter. The 2 short retainers go on the sides, the WIDE long retainer is for the rear and the NARROW long retainer is for the front. Install all the retainer mounting screws in the existing holes. BE CAREFUL NOT TO STRIP THE HOLES!

QUIK-DRAW VACUUM SYSTEM ONLY:

  • Position the new BLANKET/QD PLATEN ASSEMBLY so that it is centered on the frame. Attach the VACUUM HOSES to all 4 fittings. Position the HOOK MOUNT (HM) BLANKET RETAINERS on the blanket perimeter. The 2 short retainers go on the sides, the WIDE long retainer is for the rear and the NARROW long retainer is for the front. Install all of the retainer mounting screws in the existing holes. BE CAREFUL NOT TO STRIP THE HOLES! Lay the GLASS FRAME assembly on a clean flat surface. Remove the GLASS RETAINERS and GLASS VINYL and discard. Install the NEW GLASS VINYL and GLASS RETAINERS. IF THE BLANKET BEING REPLACED WAS FASTENED WITH VELCRO, position the new blanket centered on the vacuum platen. Place the HM retainers in the mating groove around the perimeter of the blanket, making sure the retainers are properly seated and centered. (The wide long retainer is for the rear.) Center the blanket retainers on the vacuum frame. Carefully and accurately mark the holes on the vacuum frame. Remove the blanket and drill holes (.136 dia., # 29 drill) at the marked areas. Remove the clips and reposition the blanket on the vacuum frame. Fasten the retainers to the frame using the #8B screws provided. Reinstall the GLASS FRAME assembly, center it left to right and front to back. Latch the frame shut. Apply downward pressure to the GLASS FRAME so that the glass slightly compresses the VACUUM SEAL, and tighten the HINGE MOUNTING SCREWS. (This should be done one side at a time.) Open and close the frame to check the LATCHING and HINGE operation. Reinstall the GAS CYLINDERS.
  • If the holes in the VACUUM FRAME are stripped, open the hole size to .187 (3/16″) and install a NUT STRIP as necessary. (4 included, 2 long and 2 short) The VACUUM PLATEN must be removed to install the strips. The strips are held in place inside the frame with the adhesive strips provided.
  • Reapply power to the machine and check VACUUM DRAWDOWN and basic operation of the system.
  • Place the machine in service.