The travel nut on LA500DC and LA500DCS gate operators may break when excessive force is applied to the gate such as being struck from a vehicle.
The travel nut can be identified as the white plastic nut that attaches to the internal lead screw of the arm.
The symptom of this problem is that the trolley assembly slides back and forth along the guide slots without mechanical restraint.
LiftMaster has created Trolley Service Kit K75-39337 with all the necessary parts and provides instructions on how to replace a damaged travel nut
within an LA500 arm
Compatible with various LiftMaster® DC Swing and Slide Gate Operators; manufactured after 2016.
This board is backwards compatible for older second generation units but will require UL325 Entrapment Protection System and Photoelectric Sensors or Edge Sensors.
Knob selection of operating mode (6 functions):
A - delay on operate
B - symmetrical recycler OFF first
B2 - symmetrical recycler ON first
C - signal ON/OFF delay
D - delay on release
E - interval
This pressure sensitive air-wave edge can be adapted to suit a wide variety of applications.
When touch activated the MAW123 sends an immediate pulse of air through the extrusion to an air-wave switch which sends a signal to controls to stop and/or reverse operations.
It has been designed to fit most doors with double track bottom retainers.
With appropriate mounting channel this edge will fit nearly all doors from 11/2" to 2" thick.
The MAW123 is resistant to flame water and most common greases and oils.