CONFIDENTIAL

The material that is lifted by the magnet may not release from the magnet after the magnet drop switch is activated.

If material remains attached to the magnet after the magnet drop switch is activated; the settings for the magnet controller may require adjustment. The switch should be momentarily depressed and then released only once per each lift and drop cycle. Illustration 1 shows the location of the magnet drop switch on the left implement control lever.

The adjustment for the drop and clean process is made by turning the rotary dial switch. The switch is located in the magnet controller monitor panel on the operator monitor panel. Illustration 2 shows the location of the drop and clean switch.

The drop and clean adjustment switch has eight selectable positions that are identified by indents. The various positions are used to compensate for different size magnets. Typically smaller diameter magnets require a lower dial setting and larger diameter magnets require a higher dial setting.

December 13, 2000
Component Code(s) 4450

The various positions are also used to compensate for different materials and material densities. Typically fine texture, light materials require a lower dial setting, and coarse texture, heavy materials require a higher dial setting.

Use the procedure that follows in order to correctly set the drop and clean adjustment for the magnet:

1. Set the drop and clean switch to the lowest setting.
2. Cycle the magnet through a minimum of three lift and drop cycles.
3. Do not cycle the same load of material when performing this procedure. The material will become magnetized from the repeated handling.
4. If the material does not completely release from the magnet, increase the drop and clean adjustment switch setting by one position and repeat Step 2.
5. Repeat Step 4 sequentially increasing the drop and clean adjustment switch setting until the material completely releases.

It may be necessary to set the range switch if the material does not release after completing the procedure listed. The range switch is located in the solid state controller box. The switch should be in the OFF (down) position on all generator sets that are 25 kilowatts or less. The range switch should be in the ON (up) position on all generator sets that are larger than 25 kilowatts. The range switch should also be in the ON (up) position for magnets that have a diameter larger than 1930 mm (72.0 inch). Illustration 3 shows the location of the range switch in the controller.

Illustration 1. Left Implement Control Lever
(1) Magnet drop switch

Illustration 2. Magnet Controller Monitor Panel
(2) Drop and clean adjustment switch

NOTE: The location of the magnet controller monitor panel is at the top of operator monitor panel on M318 (6ES) and M320 (6WL) Excavators.

Illustration 3. Solid State Controller Box
(3) Range switch in the ON (up) position

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