gearbox failule why!

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The Senior Swing "control box" is not handed. All Senior Swing motor "gearboxes" are handed, both the 2800 Series concealed and 9500 Series surface mounted operators. The 2800 Series "concealed a...
The older model Senior Swing came with 2 spring options. The "standard force" spring required 15 lbs of manual  opening force, and reduced force "RF" required 11 lbs of manual opening force.  All S...
LCN does not does not have or supply any information for the old (obsolete) "High Energy" Dor-O-Matic Sliding doors, Bi-Fold doors or Astro Swing doors. You MUST be AAADM certified to work on, or g...
The Mid Swing was discontinued Sept. of 2009. The Sr. Swing control box has the power boost feature which the Mid Swing control box did not have. If you replace only the Mid Swing control box with...
The Benchmark and Falcon operator gearbox assemblies are not repairable. The gearbox belt and/or pulley cannot be replaced in the field, the gearbox would need to be replaced as a complete assembly...
The Senior Swing has a built in circuit that controls closing speed through the motor. If the door is slamming, there must be a broken gear in the gearbox and the gearbox will need to be replaced.
Senior Swing, Power Operator, Benchmark
The current Benchmark III controller (9130-3462, 9140-3462) is a direct replacement for the older Benchmark II controller.
An inconsistent opening is normally caused by the arm not being installed correctly. The arm must be installed while the operator gearbox is in the full open position, and the door at 90° open posi...