Autoquip COUNTERWEIGHT SENSING SWITCH - Manual

(Reference Figures 1 thru 4)
COUNTERWEIGHT SENSING SWITCH
This kit has been shipped loose to be field mounted, wired, and adjusted per the
procedures below. These switches are intended to turn off the motor whenever a
counterweight attempts to come out the top of its guide tube during lift operation.
1. To install the counterweight sensing switch, first gain safe access to the top of the
masts. There is one (1) counterweight sensing switch supplied per lift to be
mounted to one of the mast beams (typically Left) near the top of the counterweight
tube.
2. Assemble the sensing switch as shown in Figure 1. The switch is to be wired
normally closed – tripped open.
a. Mount the switch body to the counterweight tube as shown:
i. Use Figures 2a and 2b – if the lift was installed prior to 11/2006
and/or there is no sensing switch mounting plate pre-welded to the
top of the counterweight tube. Use the switch body as a template
in the position shown, mark the hole position, and drill and tap as
instructed to mount the switch with the hardware provided.
ii. Use Figure 3 – if the lift was purchased in 11/2006 or later and/or
there is already a sensing switch mounting plate pre-welded to the
top of the counterweight tube. Mount the switch body as shown
with the hardware provided.
b. Slide and/or rotate the sensing switch arm so that it is positioned over the
counterweight tube as illustrated.
c. Tighten the switch arm, rotate upwards and confirm that the switch
contacts open (listen for “click”) at 10-20 degrees of rotation. Adjust as
necessary
NOTE: To change the actuation direction of the switch, remove the switch head. Change
the actuating control knob/mechanism to the desired actuation direction.
(Reference Figure 1)
3. Ensure that the counterweight will in fact make contact with the switch arm as the
counterweight is pulled out the top of the square tube.
4. After installing the sensing switch, a qualified electrician should, while referencing
the lift’s electrical schematic, wire the sensing switch into the circuit:
INSTALLATION INSTRUCTIONS