GEH-2038
To install these additional contacts, loosen the two tie bolts at the rear of
the switch about 3/32 inch.
Slide the new bracket over the shaft and tie
bolts so that the ·inner part of the bracket slot rests on the tie bolts
between the tie bolts and nameplate.
Tighten the tie bolts.
Slide the
square-hole coupling over the shaft extension on the present switch, then
slide the shaft extension on the new barrier assembly into the coupling,
keeping the shaft of the new barriers in the proper position to give the
correct contact sequence corresponding to the handle position.
This should
cause the side holes in the two U-shaped brackets (one attached to the new
contact assembly, the other attached, as directed above, to the old switch) to
line up.
All the inspection openings should be at the bottom of the switch.
Fasten the brackets together with the hardware supplied.
If it is desired to disassemble the switch for any reason, the following
procedure should be followed:
Remove handle and any position pointers and
saddle washers.
Place an identifying mark on the handle end of the shaft
corresponding to a position on the escutcheon such as 12 o'clock.
Remove the
escutcheon.
Remove the three screws fastening the front plate to the front
support.
If there are stops behind it, in the front support, their position
relative to the shaft identification mark should be noted; then remove the
stops, spacer and star-shaped positioning wheel if they are present.
Unscrew the tie bolts and remove the front support.
If any torsion springs
are present, pull one tie bolt back far enough so that one arm of the torsion
spring can be sprung away from the spring actuator.
Remove any spacers
present, the sleeve, the spring, and the spring actuator.
Remove the molded
barrier/cover plate, exposing the contacts of the first stage.
Each cam has one number and seven letters around the shaft opening on one side
of the cam and eight letters on the other side of the cam.
When removing
cams, mark the letter of the cam which corresponds to the shaft identification
mark.
Cam and cam followers are removed in succession, marking the position
of each cam in turn.
This is done to each succeeeding barrier.
When reassembling, it is only necessary to stack the cams back onto the shaft
in the same order as taken off, keeping the proper cam
1
etter
1
i ned up with
the shaft identification mark.
Before tightening the tie bolts into the front support, make sure that all the
barriers are properly nested.
The parts which fit into the front support may now be assembled, placing the
stops, if present, in their proper position with respect to the shaft
identification mark.
RENEWAL PARTS
It is recommended that sufficient quantities of renewal parts be carried in
stock to enable the prompt replacement of any that are worn, broken or
damaged.
When ordering renewal parts, address the nearest Utility Sales Office of the
General Electric Company, specifying quantity required and name of part
wanted, and giving complete nameplate data.
6
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