|Catalog Number 99R8B - Operating Rod|
Catalog Number 99R8B
This rod is used to connect a switch machine to a switch. It includes springs operating in both directions so that the points of the switch will remain tightly against the rails. This also allows the points to move away from the rail if equipment is operated through a switch in the reverse direction regardless of which way the switch is thrown. Specific details of the switch and switch stand are not included here, please refer to the instructions for those items for more information.
The operating rod is installed below the rails and between two ties. These ties are usually extended far beyond other ties and used to mount the switch stand. Ballest must be kept below the level of the operating rod for it to function freely. Some persons prefer to install end pieces across the ends of the two ties forming a box that can be kept free of ballest, trash, etc. The rod allows the stand to be up to slightly less than 3 feet (90 cm) from the center line of the track.
The non-spring end of the operating rod is usually connected to the switch. It should be attached to the cross tie that connects the points near the center of the cross tie (since details of this part depends on your switch construction the exact details must be decided by you). The cross tie should be drilled with a 1/4" hole. The cross tie may be up to 1/2" (12mm) thick. Use the nut and two washers (one above and one below the cross tie) provided on the operating rod to connect the operating rod to the cross tie. Make sure this pivot moves freely.
The operating rod is connected to the lever of the switch stand in a similar manner. For the typical installation this will require the lever to be below the base of the switch stand (see switch stand instructions). You should check to see how much motion is required by the points versus how much is available from the switch stand. The lever should have a 1/4" hole drilled in it for the operating rod. The position of this hole must be far enough out from its center to provide the required amount of movement plus a small additional amount for compression of the springs. Do not drill farther out than needed as this increases the forces against the switch stand. Connect the operating rod (sliding portion) to the lever using the nut and washer provided.
The operating rod can be shortened by moving the shaft collars down the rod or by moving the other end bracket along the rod. To move the end bracket, compress it in a lengthwise direction and slide it along the rod. The rod may be cut to final length as needed.
When installed, the two shaft collars can be loosened with a hex wrench and positioned to adjust the spring force in each direction. Use enough force to maintain good contact of the point to the rail. If a lot of force seems to be needed for reliable operation you should check the shape of the ends of the points and the overall geometry of the switch to see why the equipment is hitting the points.
Replacement Parts List