Asco — Installation and Reassembly

A Asco service procedure — check it applies to your exact model before use.

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Procedure

1. 4. Lubricate the core tube and spring. Apply lubricant from lubrication kit 625550–001 to the inside of the core tube and to the new core spring. Then insert the spring into the core tube. Installing Coil Assembly
2. 1. Install the coil assembly. Place the coil assembly with core spring onto the solenoid core (still connected to the weight pin). Compress the spring with downward pressure while installing (cw) the two screws with a 5/32” hex key wrench. Tighten the screws to secure the coil assembly to the switch base. Note that only the lower left and upper right holes in the coil frame are used. Figure 6. Coil Replacement
3. 2. Replace rectifier, if necessary. Reassembly Position the coil frame on its left side (rectifier on the left) on the workbench. The end of the frame with the large hole should be facing you. See Figure 6 on page 6.
4. 1. Install the new coil. Place a new coil (leads up and facing you), with washers at the far end, into the frame. Be sure the coil leads face the end of the frame with the large hole and that they face up.
5. 2. Install the new core tube. Drop the stub core into the core tube so that it extends through the end of the tube. Align the holes in the coil, insulating washer, spring washer, and frame to accept the core tube. Insert the core tube with stub core through the frame, coil, spacer washer, and spring washer so that the stub core extends through the frame. Use a pencil or wood dowel in the core tube, if necessary, to push the stub core through the frame. Remove center screw to remove rectifier and install the new rectifier turned so its terminal with the red dot is on the upper left.
6. 3. Reconnect the coil leads. Connect the coil leads with pink lugs to the rectifier’s push---on terminals marked with a red dot and no dot (dc + and --- output).
7. 4. Reconnect the rectifier. Connect the ac control wires with white lugs (from the base) to the rectifier’s push---on terminals marked with yellow dots or ~ ac symbol.
8. 5. Manually operate the switch. Use the manual handle to operate the switch to check the solenoid assembly. The action should be smooth, without any binding. If not, recheck alignment of parts and lubrication in solenoid operator. Return the switch to the Normal position (top main contacts open). Then remove the manual handle and store it in the clips on the top left side of the switch. ! ! Do not insert any metal tool inside the core tube. To prevent the possibility of personal injury or property damage, be sure to install the insulator backing piece behind the transfer switch when reinstalling it. ASCO POWER TECHNOLOGIES L.P. 50 Hanover Road, Florham Park, New Jersey 07932 USA www.asco.com 381339–126 7 Other Replacement Parts Required insulating backing piece 3 5 2 4 Figure 7. Transfer Switch shown with barrier/pole cover removed. item number part description (see Figure 7 ) 1 2 3 3 4 5 6 barrier/pole cover * arc chute control contact assembly (adjustable cams) control contact assembly (non–adjustable cams) auxiliary contact miniature switch lubrication kit * * Not Shown quantity 2 pole switch 1 4 1 3 pole switch 1 6 1 part number 260 amp switch 400 amp switch 409829 397904 335606 409829 397904 335606 1 2 2 1 1 2 2 1 715197–003 715197–003 333413---1 291525 625550–001 333413---1 291525 625550–001 381339–126 8 ASCO POWER TECHNOLOGIES L.P. 50 Hanover Road, Florham Park, New Jersey 07932 USA www.asco.com

Source: manual:381339-126_C_1 e frame.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.