MM LITE Puck Wear Surfaces Replacement Rev.: B Page 1 of 5

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Karen Lamb
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1 Rev.: B Page 1 of 5 PURPOSE This procedure provides instructions for replacing worn wear surfaces on the following MagneMover LITE pucks: Assy Number Description ML Gen 4 Puck Assy Replace by ML Gen 4.1 Puck Assy Replace by ML Gen 4.2 Puck Assy with PTFE Strip Replace by ML Gen 4.2 Puck Assy with UHMW Strip Replace by ML Gen 4.3 Puck Assy Replace by ML G5 Puck Assy CAUTION Strong Magnets To avoid severe injury, people with pacemakers and other medical electronic implants must stay away from the magnet array on the vehicles (pucks). To avoid injury from strong magnetic attractive forces: Handle only one vehicle (puck) or magnet array at a time. Do not place any body parts, such as fingers, between a vehicle (puck) or magnet array and any ferrous material or another magnet array. Vehicles (pucks) or magnet arrays not being used should be secured individually in isolated packaging. To avoid damage to watches, electronic instruments, and magnetic media (e.g., cell phones, memory disks/chips, credit cards, and tapes) keep these items away from the magnet arrays. RELATED DOCUMENTATION , MagneMover LITE User s Manual , Tandem Puck Wear Surfaces Replacement

2 Rev.: B Page 2 of 5 REQUIRED TOOLS AND EQUIPMENT The following tools, components, and equipment are required for this replacement procedure: NOTE: Depending upon replacement procedure being performed, some of the parts listed below may not be provided. Part Number Description Screw, Flat Head, M4 X 22 mm L, A4 SS, w/dri-loc 204 (2X) Assy, Top Plate, Puck, Gen 4, ML Preload Spacer, Compliant, Puck Center Plate, ML Center Plate, Puck, Ribs, G5, ML Strip, Protective, Puck Bottom, Wide, UHMW Glue Dot, Adhsv, Hi-Tack, Semi-Perm, Lo-Profile, Dia N/A N/A Isopropyl Alcohol Torque Wrench / with 2.5 mm Hex Bit PUCK ASSEMBLY AND COMPONENT IDENTIFICATION Figure 1 provides an exploded view of the puck assembly with component identification. M4 Screw (2X) Top Plate Glue Dot Spacer, G5 Spacer, G4 Center Plate Protective Strip Figure 1: Puck Assembly and Component Identification

990000631 Rev.: B Page 3 of 5 PUCK WEAR SURFACE REPLACEMENT PROCEDURE 1. For single pucks, remove the puck from the MM LITE transport system (refer to 990000410, MagneMover LITE User s Manual).

puck removal from the tandem assembly. 2. Place the puck on a non-metallic work surface with the magnet array down. Keep the magnet array at least three feet away from metal objects and tools. 3.

Lift the top plate, spacer, and center plate off the magnet assembly and properly dispose of those pieces being replaced along with the two screws (see Figure 1). 4.

3 Rev.: B Page 3 of 5 PUCK WEAR SURFACE REPLACEMENT PROCEDURE 1. For single pucks, remove the puck from the MM LITE transport system (refer to , MagneMover LITE User s Manual). For tandem pucks, remove the tandem puck assembly from the MM LITE transport system (refer to the MagneMover LITE User s Manual), then refer to , Tandem Puck Wear Surfaces Replacement, for puck removal from the tandem assembly. 2. Place the puck on a non-metallic work surface with the magnet array down. Keep the magnet array at least three feet away from metal objects and tools. 3. Remove the two screws securing the puck top and center plates to the magnet assembly using a 2.5 mm hex wrench. Lift the top plate, spacer, and center plate off the magnet assembly and properly dispose of those pieces being replaced along with the two screws (see Figure 1). 4. If there are o-rings on the threaded standoffs on the magnet assembly, remove the o-rings and dispose of properly. OPTIONAL Remove and Replace the Protective Strip A. Remove the protective strip from the magnet assembly. B. Clean the magnet assembly using isopropyl alcohol to remove any residue. C. Place the new protective strip on a flat surface with the adhesive side up and remove the adhesive protective backing from the strip (see Figure 32). NOTE: If a PTFE protective strip was used it will be replaced with a UHMW protective strip. D. Carefully center the magnet array over the center of the adhesive strip. Fold both ends of the strip over the sides of the array. Then fold the holes at each end of the strip over the threaded standoffs. NOTE: Do not stretch the protective strip. Stretching will reduce the life of the adhesive, causing the strip to peel away from the array. E. Press the strip into place using a burnisher to ensure there are no bubbles. Protective Strip Figure 2: Apply Protective Strip to

990000631 Rev.: B Page 4 of 5 5. Remove the backing from the glue dot and apply the glue dot to the center surface of the preload spacer (see Figure 3).

4 Rev.: B Page 4 of 5 5. Remove the backing from the glue dot and apply the glue dot to the center surface of the preload spacer (see Figure 3). Center Plate Preload Spacer Glue Dot Top Plate Figure 3: Apply G5 Compliant Spacer to Underside of Top Plate 6. Locate the preload spacer on the center hole on the underside of the top plate, ensuring the surface with the glue dot is fully seated and adhered to the top plate (see Figure 3). 7. Align the top plate with the center plate and press together (see Figure 3). 8. Locate the plate assembly over the standoffs on the magnet array and secure using the two M4 x 22 mm flat head screws with Dri-Loc 204, supplied with the repair kit, and tighten to 1.5 Nm [13 in-lbs] (see Figure 4). If using screws without pre-applied Loctite, use Loctite 243. NOTE: Once the screws have been installed, the Loctite must cure for 12 hours before using the puck. M4 Screws Plate Assembly Figure 4: Install Plate Assembly on

5 Rev.: B Page 5 of 5????????? Figure 5: Finished Replacement 9. For single pucks, replace the puck on the MM LITE transport system (refer to , MagneMover LITE User s Manual). For tandem pucks, replace the puck in the tandem assembly, refer to , Tandem Puck Wear Surfaces Replacement. REVISION HISTORY Rev. Revision Date Author Change Description A D. Rupp Initial release for G5 puck. B 2/9/2016 R. Surko Revised to use screws with pre-applied Loctite.

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