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
1 HP230V 3 PH Industrial Continuous Duty Jackshaft Operator
Ideal for Sectional Doors Rolling Steel
Monitored logic board with integral 372Mhz radio receiver that can hold up to 20 transmitters (MK-00647/ MK-00653/ MK-00659) or 200 of the 1 channel hand held transmitters (MK-00660).
N-1 Through-beam (MK-00649) photocells included. Other options available.
3-btn o/s/c (02-103) wall control station included
Suspended from the ceiling the operators are used on sectional overhead doors with standard lift.
T operators are directly attached to drive and control the door.
MyQ® Technology enables you to securely monitor and control your facility operator and lights with your smartphone tablet or computer for greater peace of mind.
Alerts can be received as email or pop-up (push) notifications on a mobile device ensuring the status of your commercial door.
MyQ Mobile App is a free download with no annual activation fee.
An Industrial duty operator featuring both the patented Hoist-a-Matic a self-engaging chain hoist for manual operation as well as a floor level disconnect
Specifically designed to motorize grills when a manual egress is required
Electromechanical edge for standard 2" round or square frame sliding sing and bi-part gates.
•3-sided activation allows for immediate stopping or reversing of motion
•Contours to round or square posts.
•Temperature range: -30F to 155F
•Lead wire: 18 gauge 2ft length
•Sensitivity: nominal 6-8 PSI
•2 wrie NO configuration
•ANSI/UL325 recognized component
•Cannot be bent
•One year warranty
3/4 HP230V 3PH Industrial Continuous Duty Jackshaft Operator
Ideal for Sectional Doors Rolling Steel
Monitored logic board with integral 372Mhz radio receiver that can hold up to 20 transmitters (MK-00647/ MK-00653/ MK-00659) or 200 of the 1 channel hand held transmitters (MK-00660).
N-1 Through-beam (MK-00649) photocells included. Other options available.
3-btn O/S/C (02-103) wall control station included