Mighty Mule FM350 - Manual (Page 4)

iv rev 07.16.12
Thank you for purchasing a Mighty Mule Gate Opener — GTO's “do-it-yourself” automatic gate opener! When
correctly installed and properly used, your Mighty Mule Gate Opener will give you many years of reliable service.
Please read the following information and watch the enclosed video to ensure you have the correct system for
your particular needs. Furthermore, this manual and the video will enable you to properly install your Mighty
Mule Gate Opener.
The Mighty Mule Gate Opener is designed for installation on a Pull-To-Open single leaf gate (gate that
opens into the property). By purchasing an accessory bracket [FM148], the Mighty Mule Gate Opener can
accommodate a Push-To-Open single leaf gate (gate that opens out from the property). Please see Pull-To-
Open/Push-To-Open diagram on page 9. The gate must not exceed 8 ft. or 550 lbs or exceed 16 ft. and 150 lbs.
(see Technical Specifications on page 7). The Mighty Mule Gate Opener can be used on vinyl, aluminum, chain
link, farm tube, and wrought iron gates.
Use on solid (surface) gates is not recommended. Solid surface gates have a high resistance
to the wind. If the wind is strong enough, the opener will obstruct and stop, blow fuses, or may
damage the equipment.
The Mighty Mule Gate Opener features an adjustable stall force setting. This safety feature makes the gate
stop and reverse direction within 2 seconds when it comes in contact with an obstruction. The MIN setting
means the gate will exert the minimum force on an obstruction before it stops and reverses direction. You will
need to adjust the stall force for your particular application.
The Mighty Mule Gate Opener also has an adjustable auto-close feature. After the gate reaches the fully
open position, it can be set for OFF, or to remain open up from 3 to 120 seconds before automatically closing.
Pressing the transmitter button at any time after the gate opens fully will cause it to close immediately. The auto-
close factory setting is OFF, meaning the gate will stay open until you press the transmitter (or keypad, etc.)
again.
The Mighty Mule Gate Opener accommodates extra transmitters, digital keypads, solar panels, and other
access control products.
PLEASE NOTE—If your application requires any of the following:
Column Mounting
Slide gates
Swing gates longer than 16 feet or weighing more than 550 pounds
Professional installation
Please call GTO at 800-543-4283 or 850-575-0176 for information about our GTO/ACCESS SYSTEMS
professional line of gate openers and accessories. Our Sales Department will be glad to give you the
name and phone number of a GTO/ACCESS SYSTEMS dealer near you.
BEFORE YOU BEGIN TO INSTALL YOUR AUTOMATIC GATE OPENER:
Read these instructions carefully and completely to become familiar with all parts and installation
steps. The video is only designed as an overview of the installation procedure. You must read the
installation manual for detailed instructions on gate opener safety and proper use of the gate opener
All Mighty Mule Gate Openers run off of 12 volt battery power. This installation requires the battery
charge to be maintained by either a 18 volt transformer OR an optional solar panel connected by 16
gauge, low voltage, stranded, dual conductor, direct burial wire.
NEVER USE TRANSFORMER AND SOLAR PANEL(S) AT THE SAME TIME!
It will damage the control board
PLEASE READ THIS FIRST