Limit Switch Assembly/Adjustment Drawing - Powermate LiftGate LG-3 Installation & Operation Manual

LIMIT SWITCH ASSEMBLY/ADJUSTMENT
LIMIT SWITCH REMOVAL
-Operate the Lift Gate Unit to raise the Toeplate off the floor surface.
-Remove fuse from the control box.
-Remove the two Limit Switch Cover screws and remove the Switch Cover.
-Disconnect the two wires inside the Limit Switch body, noting the terminal points.
-Loosen the Strain Relief Nut at the base of the Limit Switch and pull out the Wire Loom
with the two blue control wires.
-Remove the four 10-32NF Screws and Lock Nuts holding the Limit Switch to the Mounting
Bracket. Note the bolt position that retains the Cable Clip.
REMOVING/INSTALLING THE MOUNTING RING/BRACKET
-Should it become necessary to remove the Mounting Ring/Bracket for replacement,
continue as follows:
-Remove the fuse at the battery. Disconnect the ground connection to the vehicle frame.
Cut the positive wire below the vehicle at the existing splice near the Lift Gate Unit base.
This will have to be re-spliced later.
-From the top of the unit, pull the wiring up through the Base Post. Note: The Urethane
Cap in the top of the Post may pop out when pulling the wire out.
-Loosen the two 1/4-20NC Set Screws in the Mounting Ring and slip the Mount
Ring/Bracket off the top of the Base Post.
To re-install:
-Replace the Mounting Ring/Bracket on the Base Post in its former position. Insert the two
1/4-20NC Set Screws. Do not tighten.
-Feed the power wires and blue control wires through the urethane ring in the top of the
Post. Fish the two power wires out of the Base Post from beneath the vehicle.
-Re-splice the power wire (red) together. Re-attach the ground lug to the vehicle frame.
-Re-install fuse at the battery.
LIMIT SWITCH INSTALLATION
-Mount the Limit Switch on the Mounting Bracket using the four 10-32NF Screws. Do
not tighten the top left Nut until the Cable Clip is installed.
-Pass the two blue control wires through the Wire Loom. Insert the Wire Loom into the
urethane grommet at the top of the Base Post.
-Pass the control wires through the Strain Relief into the Limit Switch. Insert the Wire
Loom into the Strain Relief and tighten.
-Re-attach the control wires in the Limit Switch. -Normally Open Circuit.
-Install the Cable Clip on the top left 1/4-20NC Screw, clamping the Wire Loom to the
Mounting Bracket, and secure with a Lock Nut.
LIMIT SWITCH ADJUSTMENT
-Position the Mounting Ring/Bracket so that it will not interfere with the Swing Arm's full
arcing motion.
-Raise the Mounting Ring so the Limit Switch Roller is approximately 3/32"from contacting
top end of the Main Frame Tube. Contact with the Base Post is acceptable.
-Tighten the 1/4-20NC Set Screws in the Mounting Ring.
-Re-install the fuse in the Control Box.
-Test operation of the Limit Switch by using the down cycle. When the Toeplate makes
contact with any surface it should force the Main Frame Tube up into the Limit Switch
Roller, de-activating the Unit. The up cycle will function normally.
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PowerMate LiftGate™ Installation & Operation Manual
5.04
PN 018870 Rev.D2
Eng. 01/ 10/ 13