Mighty Mule FM700 User Manual

Installation Manual

for the

®

E-Z GATE OPENER

Automatic Gate Opener System

FOR SINGLE SWING GATES

WARNING!

This equipment is similar to other gate or door equipment and meets or exceeds
Underwriters Laboratory Standard 325 (UL 325). However, gate equipment has
hazards associated with its use and therefore by installing this product the
installer and user accept full responsibility for following and noting the
installation and safety instructions. Failure to follow installation and safety
instructions can result in hazards developing due to improper assembly. You agree
to properly install this product and that if you fail to do so GTO, Inc. shall in no
event be liable for direct, indirect, incidental, special or consequential damages or
loss of profits whether based in contract tort or any other legal theory during the
course of the warranty or at any time thereafter. The installer and/or user agree to
assume responsibility for all liability and use of this product releasing GTO, Inc.
from any and all liability. If you are not in agreement with this disclaimer or do
not feel capable of properly following all installation and safety instructions you
may return this product for full replacement value.

READ ALL INSTRUCTIONS CAREFULLY AND COMPLETELY before
attempting to install and use this automatic gate opener. This gate opener
produces a high level of force. Stay clear of the unit while it is operating and
exercise caution at all times.

All automatic gate openers are intended for use on vehicular gates only.

This product meets and exceeds the requirements of UL 325, the standard which regulates gate opener safety,

as established and made effective March 1, 2000, by Underwriters Laboratories Inc.

3121 Hartsfield Road • Tallahassee, Florida, USA 32303

Telephone GTO Sales: 1-800-543-GATE (4283) or [phone] • Fax [phone]

or GTO Technical Service: 1-800-543-1236 or [phone] • Fax [phone]

www.mightymule.com

©

2000 GTO, Inc.

rev - 11/05/02

RB901

The Mighty Mule Gate Opener
Class II and Class III applications.

Residential Vehicular Gate Opener-Class I: A vehicular gate opener (or system) intended for use in a home of

one-to-four single family dwelling, or a garage or parking area associated therewith.

Commercial/General Access Vehicular Gate Opener-Class II: A vehicular gate opener (or system) intended for
use in a commercial location or building such as a multifamily housing unit (five or more single family units),
hotel, garages, retail store, or other building servicing the general public.

Industrial/Limited Access Vehicular Gate Opener–Class III: A vehicular gate opener (or system) intended for
use in an industrial location or building such as a factory or loading dock area or other locations not intended to
service the general public.

Restricted Access Vehicular Gate Opener–Class IV: A vehicular gate opener (or system) intended for use in a
guarded industrial location or building such as an airport security area or other restricted access locations not
servicing the general public, in which unauthorized access is prevented via supervision by security personnel.

®

is intended for use with vehicular swing gates. The opener can be used in Class I,

VEHICULAR GATE OPENER CLASS CATEGORIES

Conversion Chart

Converting Metric Units to English Equivalents

When You Know Multiply By To Find Symbol

centimeters 0.3937 inches in. (or ")
meters 3.2808 feet ft. (or ')
kilograms 2.2046 pounds lb. (or #)

Converting English Units to Metric Equivalents

When You Know Multiply By To Find Symbol

inches 2.5400 centimeters cm
feet 0.3048 meters m
pounds 0.4535 kilograms kg

Converting Temperature

deg. Celsius (ºC x 1.8) + 32 deg. Fahrenheit ºF
deg. Fahrenheit (ºF-32) ÷ 1.8 deg. Celsius ºC

FOR YOUR RECORDS

Please record the product serial number (located on the control box cover), and the date
and place of purchase in the spaces provided below. Refer to this information when
calling GTO for service or assistance with your automatic gate opener.

Serial Number ____________________ Date of Purchase ____________________

Place of Purchase ____________________

Remember to keep all receipts for proof of purchase.

Table of Contents

Gate Opener Class Categories -------------------------------------------------------------inside cover
Units and Standards Conversion Chart ---------------------------------------------------inside cover

PLEASE READ THIS FIRST! ------------------------------------------------- page iii

Important Safety Instructions -------------------------------------------------- page 1

KEEP THESE INSTRUCTIONS FOR FUTURE REFERENCE

Disconnecting the Opener -------------------------------------------------------------page 1
Important Safety Instructions for the Consumer -----------------------------------page 2
Secondary Means of Protection Against Entrapment -----------------------------page 5
Required Safety Precautions for Gates --------------------------------------------- page 6
Warning Signs and Labels ------------------------------------------------------------page 7

Installation-------------------------------------------------------------------------- page 8

Parts List ---------------------------------------------------------------------------------page 8
Technical Specifications---------------------------------------------------------------page 10
Installation Overview ---------------------------------------------------------------- page 11
Installation of the Mounting Hardware--------------------------------------------- page 12
Mounting the Opener ------------------------------------------------------------------page 16
Installation of the Positive Stops -----------------------------------------------------page 16
Mounting the Control Box ------------------------------------------------------------ page 18
Setting the Closed Position ----------------------------------------------------------- page 19

Powering the System ------------------------------------------------------------- page 20

Solar Chart ------------------------------------------------------------------------------ page 20
Connecting the Transformer ----------------------------------------------------------page 22

Control Board Settings----------------------------------------------------------- page 23

DIP Switches ----------------------------------------------------------------------------page 23
Potentiometers --------------------------------------------------------------------------page 24

Setting Your Personal Transmitter Code ------------------------------------ page 25

Mounting the Receiver ----------------------------------------------------------- page 26

Connecting Additional Safety Devices ---------------------------------------- page 27

Connecting Accessories ---------------------------------------------------------- page 28

Push to Open Installation ------------------------------------------------------- page 29

Maintenance & Troubleshooting Guide -------------------------------------- page 31

Warranty and Repair Service -------------------------------------------------- page 33

Column Installation Information ---------------------------------------------- page 34

Accessory Catalog----------------------------------------------------------------- page 35

4 1/2" x 4 1/2" Setback Template ---------------------------------------------- insert

®

E-Z GATE OPENER

PLEASE READ THIS FIRST!

Thank you for purchasing a Mighty Mule E-Z Gate Opener—GTO's "do-it-yourself" automatic gate opener! When
correctly installed and properly used, your Mighty Mule E-Z Gate Opener will give you many years of reliable
service. Please read the following information and watch the enclosed videotape to ensure you have the correct system
for your particular needs. Furthermore, this manual and the videotape will enable you to properly install your Mighty
Mule E-Z Gate Opener.

The Mighty Mule E-Z Gate Opener

into the property). Using an accessory bracket, the Mighty Mule E-Z Gate Opener can accommodate a push-to-
open single leaf gate (gates that open out from the property). The gate must not exceed 16 feet in length nor weigh

more than 350 pounds (please see Technical Specifications on page 10). The Mighty Mule E-Z Gate Opener can be
used on vinyl, aluminum, chain link, farm tube, and wrought iron gates. Use on solid (wood) 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.

The Mighty Mule E-Z Gate Opener accommodates extra transmitters, digital keypads, solar panels, push buttons,
automatic gate locks, and other access control products. These optional accessories (see the enclosed Mighty Mule
Accessory Catalog) are available at most stores. Your store should be able to special order any accessory not in stock.
If your store cannot special order accessories, please call the GTO Sales Department.

The Mighty Mule E-Z Gate Opener features adjustable obstruction sensing. This safety feature makes the gate
stop and reverse direction within 2 seconds when it comes in contact with an obstruction. MIN is the factory setting;
meaning the gate will exert the minimum force on an obstruction before it stops and reverses direction.

The Mighty Mule E-Z Gate Opener also has an adjustable auto-close feature. After the gate reaches the fully open
position, it can be set to remain open for 1 to 120 seconds before automatically closing. Pressing the transmitter
button at any time after the gate opens fully will cause it to close immediately. OFF is the factory setting; meaning the
gate will stay open until you press the transmitter (or keypad, etc.) again.

PLEASE NOTE—If your application requires any of the following:

Swing gates longer than 16 feet or weighing more than 350 pounds;
Slide gates;
Heavy duty or commercial uses;
Professional installation;

is designed for installation on a pull-to-open single leaf gate (gates that open

please call GTO at (800) 543-GATE [4283] or [phone] for information about our GTO/PRO professional line
of gate openers and accessories. Our Sales Department will be glad to give you the name and phone number of a

GTO/PRO dealer near you.

BEFORE YOU BEGIN TO INSTALL YOUR AUTOMATIC GATE OPENER:

watch the enclosed videotape and read these instructions carefully and completely

to become familiar with all parts and installation steps.

iii

IMPORTANT SAFETY INSTRUCTIONS

Because automatic gate openers produce high levels of force, consumers need to know the potential hazards associated with
improperly designed, installed, and maintained gate opener systems. Keep in mind that the gate opener is just one
component of the total gate operating system. Each component must work in unison to provide the consumer with
convenience, security, and safety.

This manual contains various safety precautions and warnings for the consumer. Because there are many possible
applications of the gate opener, the safety precautions and warnings contained in this manual cannot be completely
exhaustive in nature. They do, however, provide an overview of the safe design, installation, and use of this product.

CAREFULLY READ AND FOLLOW ALL SAFETY PRECAUTIONS, WARNINGS, AND INSTALLATION
INSTRUCTIONS TO ENSURE THE SAFE SYSTEM DESIGN, INSTALLATION, AND USE OF THIS PRODUCT.

Precautions and warnings in this manual are identified with this warning symbol. The symbol identifies conditions
that can result in damage to the opener or its components, serious injury, or death.

Because GTO automatic gate openers are only part of the total gate operating system, it is the responsibility of the
consumer to ensure that the total system is safe for its intended use.

To Manually Open and Close
the Gate, Follow the Procedure
Below:

Disconnecting the Opener

1. Turn control box power switch OFF.

2. Remove hairpin clip, clevis pin, and washer from
front mount.

3. Pull front mount away from gate bracket.

The gate can be opened and closed manually when the
opener is disconnected.

NOTE: Substitute Pin Locks for the clevis

pins to prevent unauthorized removal of the
opener from the gate (see Accessory

catalog).

CAUTION: Disconnect the
opener ONLY when the control
box power switch is OFF and
the gate is NOT moving.

Front Mount

Clevis Pin

Gate Bracket

Washer

Hairpin Clip

1

IMPORTANT SAFETY INSTRUCTIONS

For The Consumer

WARNING: To reduce the risk of injury or death:

1. READ AND FOLLOW ALL INSTRUCTIONS. Failure to meet the requirements set forth in the instruction

manual could cause severe injury and/or death, for which the manufacturer cannot be held responsible.

2. When designing a system that will be entered from a highway or main thoroughfare, make sure the system is placed
far enough from the road to prevent traffic congestion.

3. The gate must be installed in a location that provides adequate clearance between it and adjacent structures when
opening and closing to reduce the risk of entrapment. Swinging gates must not open into public access areas.

4. The gate and gate opener installation must comply with any applicable local codes.

I. Before Installation

1. Verify this opener is proper for the type and size of gate, its frequency of use and the proper class rating.

2. Make sure the gate has been properly installed and swings freely in both directions. Repair or replace all worn or
damaged gate hardware prior to installation. A freely moving gate will require less force to operate and will
enhance the performance of the opener and safety devices used with the system.

3. Review the operation of the system to become familiar with its safety features. Understand how to disconnect the
opener for manual gate operation (see page 1).

4. This gate opener is intended for vehicular gates ONLY. A separate entrance or gate must be installed for pedestrian
use (see page 6).

5. Always keep people and objects away from the gate and its area of travel. NO ONE SHOULD CROSS THE

PATH OF A MOVING GATE.

6. Pay close attention to the diagram below and be aware of these areas at all times.

ZONE 1

ZONE 3

ZONE 2

ZONE 5

ZONE 4

Driveway

2

Gate in the 
Open Position

IMPORTANT SAFETY INSTRUCTIONS

Entrapment Zones:

Zone 1 – leading edge of the gate and the fence post.
Zone 2 – between the gate and the gate post
Zone 3 – the path of the gate
Zone 4 – the space between the gate in the open position and any object such as a wall, fence, tree, etc.
Zone 5 – pinch points between the opener and gate or post

II. During Installation

1. Install the gate opener on the inside of the property and fence line. DO NOT install an opener on the outside of the
gate where the public has access to it.

2. Be careful with moving parts and avoid close proximity to areas where fingers or hands could be pinched.

3. Devices such as safety edges and photo beams provide additional protection against entrapment (see page 5).

4. If push buttons or key switches are installed, they should be within sight of the gate, yet located at least 10 feet from
any moving part of the gate (see diagram below). Never install any control device where a user will be tempted to

reach through the gate to activate the gate opener.

5. Do not activate your gate opener unless you can see it and can determine that its area of travel is clear of people,
pets, or other obstructions. Watch the gate through its entire movement.

6. Secure outdoor or easily accessed gate opener controls in order to prohibit unauthorized use of the gate.

10'

10'

Moving Gate

Area

Driveway

NEVER INSTALL

any control device

10'

10'

within gray area

3

IMPORTANT SAFETY INSTRUCTIONS

III. After Installation

1. Attach the warning signs (included) to each side of the gate to alert the public of automatic gate operation. It is
your responsibility to post warning signs on both sides of your gate. If any of these signs or warning decals become

damaged, illegible or missing, replace them immediately. Contact GTO for free replacements.

2. The gate is automatic and could move at any time, posing a serious risk of entrapment. No one should be in contact
with the gate when it is moving or stationary.

3. Do not attempt to drive into the gate area while the gate is moving; wait until the gate comes to a complete stop.

4. Do not attempt to "beat the gate" while the gate is closing. This is extremely dangerous.

5. Do not allow children or pets near your gate. Never let children operate or play with gate controls. Keep the
remote controls away from children and unauthorized users; store controls where children and unauthorized users do
not have access to them.

6. KEEP GATES PROPERLY MAINTAINED. Always turn power to opener OFF before performing any
maintenance. Clean the push-pull tube with a soft, dry cloth and apply silicone spray to it at least once per month.

7. Service the gate and gate opener regularly. Grease hinges, spray push pull tube with high quality silicon spray and
replace the battery every 3-5 years.

8. To operate this equipment safely, YOU must know how to disconnect the opener for manual gate operation
(see page 1). If you have read the instructions and still do not understand how to disconnect the opener, contact the
GTO Service Department.

9. Disconnect the opener ONLY when the power is TURNED OFF and the gate is NOT moving.

10. Make arrangements with local fire and law enforcement for emergency access.

11. Distribute and discuss copies of the IMPORTANT SAFETY INSTRUCTIONS section of this manual with all

persons authorized to use your gate.

12. IMPORTANT: Save these safety instructions. Make sure everyone who is

using or will be around the gate and gate opener are aware of the dangers
associated with automated gates. In the event you sell the property with the
gate opener or sell the gate opener, provide a copy of these safety instructions
to the new owner.

Should you lose or misplace this manual, a copy can be obtained by
downloading one from the Mighty Mule web site (www.mightymule.com), by
contacting GTO, Inc., at 3121 Hartsfield Road, Tallahassee, Florida 32303 or
by calling 1-800-543-4283 and requesting a duplicate copy. One will be
provided to you free of charge.

4

IMPORTANT SAFETY INSTRUCTIONS

Secondary Means of Protection Against
Entrapment

As specified by Gate Operator Safety Standard, UL 325 (30A.1.1), automatic gate openers shall have an inherent entrapment
sensing system, and shall have provisions for, or be supplied with, at least one independent secondary means to protect
against entrapment. The Mighty Mule utilizes Type A, an inherent (i.e., built-in) entrapment sensing system as the primary
type of entrapment protection. Also, the Mighty Mule has provisions for the connection of Type B2 protection to be used as
the secondary type of entrapment protection, if desired.

1. For gate operators utilizing a contact sensor (e.g., safety edge sensor– Type B2) in accordance with UL 325 (51.8.4 [i]):

A. One or more contact sensors shall be located at the leading edge, bottom edge, and post edge, both inside and
outside of a vehicular swing gate system.
B. A hard wired contact sensor shall be located and its wiring arranged so that the communication between the
sensor and the gate opener is not subjected to mechanical damage.
C. A wireless contact sensor such as one that transmits radio frequency (RF) signals to the gate opener for
entrapment protection functions shall be located where the transmission of the signals are not obstructed or
impeded by building structures, natural landscaping or similar obstruction. A wireless contact sensor shall
function under the intended end-use conditions.

Leading Edge Contact Sensor

on both sides of the gate

Vehicular Gate

Bottom Edge Contact Sensor

on both sides of the gate

Post Edge Contact Sensor

on both sides of the gate

ENTRAPMENT ALARM (UL 325; 30A.1.1A)

The Mighty Mule E-Z Gate Opener is designed to stop and reverse within 2 seconds when the gate comes in contact
with an obstruction or when an object activates the non-contact sensors. Additionally, these openers are equipped
with an audio entrapment alarm which will activate if the unit obstructs twice while opening or closing. This
alarm will sound for a period of 5 minutes, or until the opener receives an intended signal (e.g., from a transmitter)
and the gate returns to a fully open or fully closed position.

5

IMPORTANT SAFETY INSTRUCTIONS

Required Safety Precautions for Gates

Install Warning Signs

Warning signs alert people of automatic gate operation and are required when installing the Mighty Mule E-Z Gate Opener.
Furthermore, a walk-through gate must be installed if pedestrian traffic is expected near the vehicular gate. We recommend
using the GTO Bulldog Pedestrian Gate Lock (Call the GTO Sales Department) for controlled access.

Bulldog Pedestrian

Gate Lock

(recommended, not included

Pedestrian Gate

)

Contact Sensor

(recommended, not included)

Warning Sign

Vehicular Gate

Contact Sensor

(recommended, not included)

Contact Sensor

(recommended, not included)

Entrapment Protection

GTO’s inherent obstruction settings, even when properly adjusted, may not be sensitive enough to prevent bodily injury in
some circumstances. For this reason, safety devices such as safety edge sensors (or photoelectric sensors), which stop and

reverse gate direction upon sensing an obstruction, are suggested for augmented protection against entrapment.

Warning Signs

The warning signs (at right) must
be installed on both sides of the
gate (see page 7 for details).

!

WARNING

Moving Gate Can Cause

Injury Or Death

1. KEEP CLEAR! Gate may move at any time.

2. Do not allow children to operate gate or
play in gate area.

3. This gate is for vehicles only. Pedestrians
must use a separate entrance.

6

IMPORTANT SAFETY INSTRUCTIONS

These warning labels should be found at the locations specified below. If any of them are missing, immediately contact GTO
for replacements.

!

WARNING

!

WARNING

MOVING GATE

Can Cause Injury or Death

1. KEEP CLEAR! Gate may move at any time.

2. Do not allow children to operate gate or play in gate area.

3. This gate is for vehicles only. Pedestrians must use
separate entrance.

Moving Gate Can Cause

Injury Or Death

1. KEEP CLEAR! Gate may move at any time.

2. Do not allow children to operate gate or
play in gate area.

3. This gate is for vehicles only. Pedestrians
must use a separate entrance.

warning signs (2 enclosed) to be installed on each side
of the gate (3–5 feet above the bottom of the gate)

Conforms to UL 325 STANDARDS

Maximum Gate: 500 lb. (226.7 kg); 16 ft. (4.8 m)

USC

L

I

S

E

T

#xxxxxxx

TO MANUALLY OPEN AND CLOSE THE GATE:

1. Turn control box power switch OFF.

2. Disconnect front mount from gate bracket.

3. Pull front mount away from gate bracket.

Voltage: 12 Vdc; Frequency: 0 Hz; Power: 41.4 W

D

Class I, II and III Vehicular Swing Gate Operator.
Serial Number: XXXXXXXXXX

warning labels (2) installed on each side of
operator housing

Series

Disconnect operator ONLY when the control box power
switch is OFF and the gate is NOT moving.

GTO, Inc. Tallahassee, Florida USA

product identification and manual operation instruction label (1)
installed on control box cover

7

RB2000

Single Gate Opener Parts List

Opener and Mounting Hardware

Gate Bracket (1)

Closed Position
Stop Plate (1)

Post Bracket (2)

8" Nylon Cable Tie (14)

4 1/2" x 4 1/2"



Setback Template (1)



ly

b

m

e

s

s

A

t

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t B

a

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In

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t

I

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in

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S

6

d

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a

5

es

g

a

p

4 1/2' Power Cable (1)

Hardware

Gate Opener (1)

®

AUTOMATIC GATE OPENER

Post Pivot Bracket (1)

Customer Support Card (1)

Installation Video (1)

®

R

E

EN

P

O

E

T

A

G

-Z

E

3/8" x 8" Bolt (4)

3/8" x 3" Bolt (2)

3/8" x 2" Bolt (1)

5/16" x 1-3/4" Bolt (1)

3/8" x 1-1/8" Clevis Pin (2)

3/8" Washer (9)

3/8" Lock Washer (7)

5/16" Washer (1)

3/8" Nut (7)

5/16" Nut (1)

Hairpin Clip (2)

2" Receiver Mounting Screw (1)

8

Single Gate Opener Parts List (continued)

Control Box and Electrical Components

Battery (1)

Receiver (1)

GTO Transmitter(1)



Transformer (1)

!

WARNING

Moving Gate Can Cause

Injury Or Death

1. KEEP CLEAR! Gate may move at any time.

2. Do not allow children to operate gate or
play in gate area.

3. This gate is for vehicles only. Pedestrians
must use a separate entrance.

Warning Signs (2)

Control Box Lid (1)



Control Box (1)

Tools Needed

• Power Drill

• Open End Wrenches — 3/8", 7/16", 1/2", and 9/16"

• 3/8" Drill Bit

• Hacksaw or Heavy Duty Bolt Cutters

• Slotted (Flat Bladed) Screwdriver

• Phillips Screwdriver

• Tape Measure

• Level

• Wire Strippers

• C-Clamps — small, medium, and large

ALSO, YOU WILL NEED THESE ITEMS BEFORE YOU BEGIN THE INSTALLATION (Some of these items can
be found in the Accessory Catalog on page 35):

• The gate needs a stop post for the open position. This post is not provided. See Installation of the Positive Stops

on page 16 for more information.

• Additional low voltage wire may be needed; length depends upon the distance between the transformer power
supply and the control box. See Powering the System on page 20, and the Accessory Catalog.

• If your gate is more than 1000' away from an ac power source you will need to use at least one Mighty Mule Solar
Panel to trickle charge the battery. See the Accessory Catalog.

• If your fence post is made of wood and is less than 6" in diameter or 6" square, see page 12.

• If your fence post is larger than 6" in diameter you will need threaded rods or carriage bolts longer than 8". See
page 15.

• If you have thin walled tube or panel gates, see Recommended Reinforcement Examples on page 12.

• Depending on the type of gate, a horizontal cross member or mounting plate may be needed to mount the front
of the opener and gate bracket to the gate. See page 11, step 2; page 15, step 10.

• Power cables 40' long are available for mounting your control box away from the gate (i.e., in a more secure
location). See the Accessory Catalog.

9

Technical Specifications

MIGHTY MULE GATE OPENER

DRIVE

• Low friction screw drive (linear actuator) rated for -20 ºF to +160 ºF (-28 ºC to +71 ºC).

• Powered by a 12 V motor with integral case hardened steel gear reducer. Motor speed reduced to 220 rpm. Generates
330 ft.. lb. of torque at 12 V.

• Maximum opening arc of 110º. Approximate opening time (90º): 15 to 17 s, depending on weight of gate.

POWER

• The system is powered by a 12 Vdc, 7.0 Ah, sealed, rechargeable acid battery.

• Battery charge is maintained by a 120 Vac, 18 Vac output transformer rectified to 14.5 Vdc (20 VA) through the GTO
control board. Two (2) blade-style control board fuses are rated for 15 A.

NOTE: The transformer should not be directly connected to any battery. Do not replace fuses
with higher ampere rated fuses; doing so will void your warranty and may damage your control board.

• Battery charge is maintained by GTO Solar Panel Charger: float voltage of 14.5 Vdc output from a 19
silicon alloy panel. Generates minimum of 5 W at 300 mA. A gated diode on the control board prevents battery
discharge.

CONTROL

• GTO microprocessor-based control board is set for single leaf, pull-to-open gate installations. DIP switches can be
adjusted to accommodate an optional kit for push-to-open gates (see Accessory Catalog).

• Control board has temperature compensated circuits.

•A circuit on the control board regulates charging. "Sleep draw" is 40 mA; "active draw" is 2 to 5 A.

• Auto-memorization of digital transmitter code.

• GTO remote-mounted RF receiver tuned to 318 MHz.

• Limit controls are mechanical. Adjustable range of push-pull tube is 7

3

tube fully retracted is 33

/

4", mounting point to mounting point.

1

/

2" to 11

1

/

2". Opener length with push-pull

• Adjustable auto-close timer (OFF to 120 s), inertia, and obstruction sensitivity using three (3) potentiometers.

• Power terminal bock accommodates a transformer and solar panels.

• DIP switches simplify setup of gate opener.

• Accessory terminal block fully compatible with push button controls, digital keypads, safety loops, etc.

• Control board allows connection of safety edge sensors and photoelectric sensors.

• Audio entrapment alarm sounds if unit encounters an obstruction twice while opening or closing.

3

/

8" x 8

1

/

2"

OPERATIONAL CAPACITY

• Depending upon the length of the gate leaves and the number of operational cycles* per day, the Mighty Mule Gate
Opener® can open single gates weighing up to 350 lb.—if all installation procedures have been

properly followed.

Gate Capacity Chart

16 ft.
14 ft.
12 ft.

3.5-10 ft.

Gate Length

135

145

155

165

50 lb. 100 lb. 150 lb. 250 lb. 350 lb.

(estimated number of cycles based on use with a transformer)

120

130

140

150

105

115

125

135

NONE

85

95

105

NONE

NONE

60

70

Gate Weight

NOTE: BALL BEARING HINGES SHOULD BE USED ON ALL GATES WEIGHING OVER 250 LB.

To determine the number of cycles the gate opener will perform using solar panels, please see the specifications listed
on page 20 or call [phone] or [phone] for more information.

* An operation cycle is one full opening and closing of the gate.

These specifications are subject to change without notice.

10

Horizontal Cross Member

Gate Swings Evenly and Freely
Hung Firmly and Plumb

Receiver

Post Bracket Assembly

Control Box with Battery

Gate Bracket

Single Gate Opener

Fence Post Set in Concrete
Run 1000’ (max.) of low
voltage wire to control
box from transformer
(wire not included).

Power Cable

Closed Position Positive Stop Plate

120 Volt indoor
Transformer

(surge protector

not supplied)

PVC conduit (not included)

to protect wire from lawn

mowers and weed eaters.

Warning Sign

Installation Overview

Pull-to-Open Gates (Gate Opens into the Property)

The diagram shown below is an example of a pull-to-open installation on a chain link fence and single gate. Mounting the
opener on a masonry column requires special procedures; see Column Installation Information on page 34 if you intend to
mount the opener on a column. Furthermore, if you have a push-to-open gate, you will need to purchase a push-to-open kit
(see Accessory Catalog) to properly configure your system. See Push to Open Installation on page 29 before proceeding.

Preparation of the Gate

Step 1

The gate must be plumb, level, and swing freely on its
hinges. Wheels must not be attached to the gate. The
gate must move throughout its arc without binding or

dragging on the ground. Note that gates over 250 lb.
should have ball bearing hinges with grease fittings.

Step 2

The fence post must be secured in the ground with
concrete so it will not twist or flex when the opener is
activated. Be sure to position the opener near the
centerline of the gate to keep the gate from twisting and
flexing. The addition of a horizontal or vertical cross
member (if one is not already in place) to provide a
stable area for mounting the gate bracket is also
important.

Horizontal Cross Member

Vertical Cross Member

11

Installation of Mounting Hardware

The position of the post bracket determines the leverage and efficiency of the opener. The post bracket position also sets the
clearance between the opener and gate in the open and closed positions.

The curved design of the post bracket works well for installations on round and square fence posts. Because the post bracket
carries the entire thrust of the active opener, bolts that completely penetrate the fence post must be used.

On wooden posts, place a metal plate or washer
(not supplied) between the nuts and the fence
post to prevent the thrust of the opener from
pulling the bolts and washers out of the wood.

NOTE: A fence post smaller than 6" in diameter
or 6" square should be made of metal instead of
wood so that it will remain stable while the
opener is moving the gate.

Larger than 6" diameter post

Center of Gate Hinge

4 1/2"

4 1/2"

Pull-to-Open Installation

Wooden Post

Post 
Bracket

Post 
Pivot Bracket

Metal Plate

Wooden Post

Post
Bracket

Post
Pivot Bracket

Metal Plate

On round posts of 6" diameter or larger, the post pivot bracket may
not be necessary for the installation. In this instance, the two post
brackets are mounted by themselves.

IMPORTANT:

We strongly recommend using steel pipe, wood or metal to reinforce thin walled tube gates or wood to reinforce panel gates
as shown. These reinforcement methods will prevent damage to the opener and gate when the opener is installed.

Because the size tube gates vary, it is impossible to provide the appropriate reinforcement material for every application. If
you are unable to locate suitable reinforcement materials, call GTO sales at 1-800-543-4283.

Recommended Reinforcement Examples

Steel Pipe Cut in Half

(not supplied)

Thin Walled Tube Gate

Gate Bracket

Wood or Metal
Reinforcement

(not supplied)

12

Gate Bracket

Panel Gate

1" x 6" Wood Reinforcement

Gate Bracket

Determining the Mounting Position
of the Post Bracket Assembly and the Gate Bracket

Step 3

Insert the 3/8" x 2" bolt through
the center hole of the post
brackets and post pivot bracket as
shown. Fasten a
nut on the end of the bolt. DO
NOT overtighten the nut because
the post pivot bracket will have to
be adjusted later.

3

/8" washer and

3/8" x 2" Bolt

Post Bracket

Post Pivot Bracket

Post Bracket

Post Bracket Assembly

3/8" Washer
3/8" Lock Washer
3/8" Nut

NOTE: The following steps are
intended for pull-to-open gate
installations. If you are mounting
your opener on a push-to-open gate
(e.g., a gate on a sloped driveway)
you will need to purchase a Push To

Open bracket (see Accessory
catalog). Also, see Push-to-Open

Installation beginning on page 29.

Step 4

Attach post bracket assembly and gate bracket to the opener with the clevis pins and washers. Secure the clevis pins with
hairpin clips.

Front Mount

Clevis Pin

Rear Mount

Clevis Pin

Opener

Gate Bracket

Washer

Hairpin Clip

Post Bracket Assembly

Washer

Hairpin Clip

Step 5

With the gate in the open position (80º to 110º from its closed position), adjust the post bracket assembly and gate bracket
until the opener is level. While holding the opener level, use C-clamps to temporarily keep the post bracket assembly and
gate bracket in their respective positions on the fence post and gate.

Post Bracket Assembly

Level Opener

Fence Post

E-Z G

®

ATE O

PEN

ER

Gate In Open Position 


LEVEL horizontal cross member

Gate Bracket

13

Step 6

Study the 4 1/2" x 4 1/2" setback template (see insert) provided with this manual. Once you are familiar with its
illustrations, cut and save the template from the insert. The template will determine the correct position of the post pivot
bracket before mounting the opener on the fence post.

Remove hairpin, clevis pin, and washer from front mount and close the gate. Rest disconnected opener on cross member of
gate. Stand inside property next to fence post and place one end of template over center of gate hinge. Place the other end of
template over the post pivot bracket hole (either of the two mounting holes in post pivot bracket can be used) where the

1

opener will be attached. Be sure to hold the template at a 90º angle between these two points and measure 4

/2" back from

the center of the gate hinge. You will need to rotate the post pivot bracket or the entire post bracket assembly to align it with
the square angle of the template. THE ANGLE BETWEEN THE GATE HINGE AND THE POST PIVOT BRACKET

MUST MATCH THE ANGLE OF THE SETBACK TEMPLATE.

NOTE: If you move the post pivot bracket, be sure one of the post bracket holes is aligned

with the rest of the assembly (the center hole should already have a bolt through it).

Flipping the Post Pivot Bracket gives more position options.

After verifying that you have complied with the 4 1/2" x 4 1/2" setback, insert the 5/16" x 1 3/4" bolt through the aligned
holes of the post bracket and post pivot bracket (illustrated below) and fasten it with the

5

/16" washer and nut.

IMPORTANT: If you loosened the clamp on the post bracket to achieve the 4 1/2" x 4 1/2" setback, tighten it in its new
position and recheck the gate bracket with the gate in the open position (move the gate bracket and re-clamp it if necessary).

Examples of a 4 1/2" x 4 1/2" Setback

5/16" x 1 3/4"
bolt

Pull-to-Open Installation

Center of Gate Hinge

4 1/2"

o

90

4 1/2"

GATE

Metal Post

Post
Bracket

5/16" x 1 3/4"
Bolt

Post
Pivot Bracket

IMPORTANT

Closed Position

Make sure there is 
adequate clearance 
between opener and 
gate in the open and 
closed positions

Open Position



Washer

4 1/2"

90

Center of Gate Hinge

GATE

4 1/2"

Pull-to-Open Installation

o

Verify the Position of the Gate Bracket and Post Bracket
Assembly:

With the gate in the open position, make sure the following conditions are met:

1. The opener is level.

2. The 4 1/2" x 4 1/2" setback measurement is correct (Step 6).

3. There is sufficient clearance between opener and gate in the open and closed
positions.

14

Installing the Post Bracket Assembly and Gate Bracket

Step 7

Mark reference points for bolt holes on the fence post through middle of bracket slots. Marking reference points in this
manner allows room for adjustment when mounting the post bracket assembly and gate bracket. After marking your
reference points, remove the
opener and brackets from the
fence and gate.

Step 8

Drill 3/8" holes into fence post
as marked.

Step 9

Fasten post bracket assembly to
the fence post using

(4) 3/8" x 8" bolts, washers,
lock washers, and nuts
(provided). Remove excess
bolt length extending beyond
the tightened nuts with a
hacksaw or bolt cutters.

Mark fence post through 
middle of bracket slots
and drill 3/8" holes

SIDE VIEW

Post Bracket
Assembly

EXAMPLES

TOP VIEW

Round Metal Post

Square Metal Post

Square Wood Post

NOTE: In cases where the
fence post has a diameter larger
than 6", threaded rods or

carriage bolts longer than 8"

(not supplied) must be used.

Step 10

Mark reference points for bolt holes on
the gate cross member through middle of

gate bracket slots. Drill 3/8" holes into
the gate cross member as marked.

Mount gate bracket using (2)

3

/8" x 3" bolts, washers, lock washers,
and nuts (provided). Cut off excess bolt
length extending beyond the tightened
nuts.

Gate Bracket Mounting Examples

FRONT VIEW

Round Tube & Chain Link Gate



SIDE VIEW

Remove excess bolt length 
with hacksaw or bolt cutters

Gate In Open Position 


LEVEL horizontal cross member

Mark cross member through middle of
gate bracket slots and drill 3/8" holes

FRONT VIEW

Mounting Plate 
Created for 
Decorative Gate
(required but not
supplied)

Round Wood Post

SIDE VIEW

Square Tube Gate

15

Remove excess bolt length 
with hacksaw or bolt cutters

Mounting the Opener

Step 11

Attach the opener to the securely bolted post bracket assembly and gate bracket using clevis pins, washers, and hairpin clips,
or optional Pin Locks (see Accessory Catalog). Verify that the opener is level and adjust the post bracket assembly if
necessary.

Post Bracket Assembly
bolted to fence post

Level Opener

Gate Bracket bolted
to gate cross member

Clevis Pin, Washer, and Hairpin Clip

E-Z GATE O

PENER

Clevis Pin, Washer, and Hairpin Clip

Fence Post

LEVEL horizontal cross member

®

Gate In Open Position 


Installation of the Positive Stops

The positive stops hold the gate firmly in the open and closed positions. The positive stops also form the
boundaries of the gate operating arc and help stabilize the gate. Moreover, a stable gate maintains the long life of
your automatic gate opener system. To further enhance the stability and security of your gate, install the optional
Mighty Mule Automatic Gate Lock® (see Accessory Catalog).

Step 12

With the gate at its maximum open position, measure the
distance from the gate hinge to the end of the gate. At

approximately 2/3 of this distance (using the hinge as your
starting point), place a mark on the ground directly under
the gate. Install the open position stop at this mark (see
illustration). The open position stop post may be made of
wood, metal, or concrete and should be firmly secured in the
ground (we recommend setting it in concrete). When the
open position stop post is in the ideal position, the gate will
strike the post just as the opener motor shuts down.

Gate Hinge

The gate must open
80º (min.) to 110º (max.)

Open Position Stop

Closed Position 
Stop Plate

Wood, metal, or concrete 

post set in concrete.

Step 13

Remove hairpin, clevis pin, and washer from front mount
and close the gate (remember to support opener). Fasten the
closed position stop plate to the end of the gate frame on the
gate centerline, but do not tighten it completely. Slide the
stop plate toward the fence post until they touch (see
illustration). Once you have moved the stop plate to the
correct position, tighten its hardware completely.

Use the appropriate hardware for your type of gate (use
U-bolts if you have a tube or chain link gate; wood or lag
screws for wood gates; etc.). This hardware is not provided.

16

SIDE VIEW

Gate Post

Closed Position Stop Plate mounted 
on metal post with U-bolts.

Fence Post

TOP VIEW

At this stage of the installation, the opener should be installed on the
gate and the open and closed position stops should be in place.

Check List

• The gate is plumb, level, and swings smoothly on its hinges.

• After measuring with the 4 1/2" x 4 1/2" setback template, the post bracket assembly
was bolted to the fence post.

• A plate or support was added for the gate bracket (if necessary).

• The opener is level and mounted on the centerline of the gate.

C

L

Gate In Closed Position

Open Position Stop Post
(set in concrete)

Gate In Open Position

Closed Position Stop Plate

Open Position Stop Post
(set in concrete)

17

Mounting the Control Box

STATUS

BATT

PWR. SW.

Step 14

Mount the control box using the nylon cable ties (provided)
or another secure mounting method. The control box must be
mounted at least 3 feet above the ground to protect it from
rain splash, snow, etc., and at least 3 feet from an ac power
source to prevent electrical interference.



Step 15

Make sure the control box power switch is in the OFF
position. Unscrew and remove the control box cover and
slide the battery into position with its terminals to the left (see
illustration). Push battery down until it fits snugly in control
box. Connect the BLACK battery wire to the NEGATIVE
(–) battery terminal. Connect the RED battery wire to the

POSITIVE (+) terminal. Pay close attention to the color of
the wires. If the wires are connected incorrectly, the control
board will be damaged. NEVER insert the battery with the

terminals to the right.

RED wire to POSITIVE (+) terminal

RED

BLACK

Step 16

Strip approximately 3/16" of insulation from each wire of the power

BLACK wire to NEGATIVE (–) terminal

cable. Twist each exposed wire tightly (there are five [5] wires inside
the power cable sheath). Loosen sealing nut on strain relief hub at

HINT: A dab of household petroleum jelly
on the battery terminals will help prevent
corrosion.

bottom of control box. Insert power cable into control box through
strain relief. Thread approximately 4" of the power cable into the
control box and retighten sealing nut until the power cable locks into
place.

18VAC SOLAR
~ ~ – +

POWER IN

®

ER

PEN

O

TE

GA

IC

AT

TOM

AU

®

ER

PEN

GATE O

ATIC

UTOM

A

O
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A

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S
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C

S
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T

A
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S

.
W
S

.

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W
P

–

BATT

+

G

G

D

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P

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ST
IR
F

IA
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B

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.
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LEARN

T

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B

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G

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O

G

N

S

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U

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A

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TO

A
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P

O

D
N
O

C
E

S

12 V Battery

Lock Nut

Hub

Strain Relief

Operator Power Cable

Strain Relief

Sealing Nut

18VAC SOLAR

~~ – +

for the Mighty Mule E-Z Gate Opener

RED

BLK

Power Cable

ORG

Wrong Wrong

Terminal 

Wire Wire

Block

Terminal 
Block

Wire

Correct

Terminal 
Block

SEQ1
SEQ2

ON

LEARN

BLU

GRN

CLS EDG

OPN EDG

RED

BLK

ORG

BLU

GRN

CLS EDG

OPN EDG

GRN

ORG

BLU

WHT

R B G

SECOND OPERATORFIRST OPERATORPOWER IN ALARM ACCESSORY RCVR

Insert the stripped power cable wires into the appropriate terminals on
the FIRST OPERATOR terminal block. The green wire should be
inserted into the GRN terminal, the blue wire into BLU, the orange
wire into ORG, black wire into BLK, and the red wire into the RED
terminal.

Tighten the set screws against the end of the wires. A dab of
petroleum jelly on each terminal will help prevent corrosion.

18

Step 17

Carefully insert the power cable
plug into the coupling at the
rear of the opener. Turn the
plug until it aligns with the pins
in the coupling. Push the plug
into the coupling until it stops.
Finger tighten the sleeve nut to
lock the plug in position.

Replace the control box cover and fasten it with (4) screws. Turn the control box power
switch ON.

The control board will energize in approximately 15 seconds.

Attach Power Cable Plug

E-Z GATE OPENER

®

Push-Pull Tube

Setting the Closed Position

Step 18

Reattach the front mountof the opener arm to gate bracket using a clevis pin, washer, and hairpin clip. Press the transmitter
button to activate the opener and determine the degree of gate closure. Initially, the push-pull tube will extend only 7" to 8"

until the stroke adjustment knob is set (see below right). The maximum extension of the push-pull tube is 11

1

/2".

Step 19

To increase the degree of gate closure, loosen the
stroke adjustment knob on the bottom of the

opener housing and move it approximately
toward the gate bracket (see Fig. A). Finger tighten

the knob (DO NOT USE PLIERS OR OTHER
TOOLS TO TIGHTEN KNOB). Press the

transmitter button to check your adjustment. To
decrease the degree of gate closure, move the stroke
adjustment knob away from the gate bracket (see
Fig. B).

1

/8"

Stroke Adjustment Knob

Figure B

Moving knob away from
the gate bracket decreases
gate closure.

Figure A

Moving knob toward
the gate bracket
increases gate closure.

Step 20

Repeat the procedure in Step 19 until the gate closes firmly as the opener motor shuts down. Each time you adjust the knob,
finger tighten it before pressing the transmitter button to check your adjustment.

If the push-pull tube has been extended too far (i.e., if the knob is too close to the gate bracket), the gate will immediately
reverse and open after closing. When the knob setting is correct, the gate will close firmly, but not sharply, against the
positive stop plate. The motor will run for one-half second after the gate closes against the stop plate. If the motor continues
to run for more than one second, the push-pull tube is overextended and further adjustment is necessary. If the motor strains
too long against the stop plate, the fuse on the control board (above FIRST OPERATOR terminal) will be blown. This
blade-style 15 ampere fuse (sold by most automotive supply stores) can be easily replaced.

NEVER use a fuse rated higher than 15 amperes!

19

Powering the System

Installation of the Transformer

IMPORTANT:

• The transformer is designed and intended for indoor use. If the transformer can be plugged only into
an outside electrical outlet, a weatherproof cover or housing (available at local electrical supply stores)
must be used.

®

• All low voltage wire used with the Mighty Mule Gate Opener
multi-stranded, direct burial wire (see page 21 and the Accessory Catalog). Do not run more than

1000 feet of wire.

• If your gate is more than 1000 ft. from an ac power source, you will need to use at least one 5 watt
Solar Panel to charge the battery (see Accessory Catalog). Refer to the Solar Panels and Gate
Activity chart below.

Solar Panels and Gate Activity

The table and map
illustrate the maximum
number of gate cycles
to expect per day in a
particular area when
using one to three GTO
5 watt solar panels (see
Accessory Catalog).
The figures shown are
for winter (minimum
sunlight) and do not

account for the use of any accessory items.

Accessories connected to your system will
draw additional power from the battery.

Winter Ratings Zone 1 Zone 2 Zone 3

12 volt single gate (one 5 W panel) 4 8 13
12 volt single gate (two 5 W panels) 8 16 26
12 volt single gate (three 5 W panels) 11 20 30

must be 16 gauge dual conductor,

NOTE: A maximum of three solar panels
can be connected to the Mighty Mule Gate
Opener®. Consult Solar Panel Installation
Instructions.

Step 21

Make sure the power switch is OFF
before proceeding to the next step.



Step 22

Select the electrical outlet into which you
will plug the transformer. Measure the distance
from this outlet to the control box following
the path where the wire will be laid. After you have measured
how much wire is needed, cut the wire to the appropriate length.

20

IMPORTANT INFORMATION ABOUT LOW VOLTAGE WIRE

RED

BLACK

STATUS

BATT

PWR. SW.

The only wire acceptable for use with GTO products is 16 gauge multi-stranded, low voltage, PVC
sheathed wire. This particular gauge enables the transformer to provide an adequate charge through the
control board to the battery at distances up to 1000 ft.

DO NOT use telephone wire or solid core wire. Unlike multi-stranded wire, these types of wire are
inadequate for use with your gate opener system. Telephone wire and solid core wire do not deliver
enough voltage for your gate opener to function and will cause the system to go into a condition known
as "low voltage lockout."

Never splice wires together. Splicing permits corrosion and seriously degrades the wire's ability to carry
an adequate current.

Step 23

Lay the measured length of low voltage wire in a
trench following a path from the selected electrical

U

outlet to the control box. Wires coming up from the
ground should be run through PVC conduit to protect
them from lawn mower blades, weed eaters, and
grazing animals. Be sure to bury the wire laid in the
trench.

W

P

–

ATT

B

+

G

G

D

D

E

E

N

S

P

N

L

U

G

R

O

C

L

K

R

G

D

B

L

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B

R
A
L

R

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S

C
A
V

8
1

+

–

~

~

R

O
T
A

R
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P

O
T
S

IR

F

POWER IN

A
LO
C

S

ATU

T

S

.

W
. S
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IN

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N
P

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LS

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C

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B

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B

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SE

TIA
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C

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STR
B

S.

EN

LEARN

B

R
V

Step 24

Feed the low voltage wires upward through the strain
relief opening on the lower left of the control box. Pull
6" to 8" of wire into the control box and tighten the
strain relief screw to secure the wires.

WARNING! DO NOT PLUG THE TRANSFORMER INTO AN OUTLET DURING THIS STEP!

THE TRANSFORMER MUST ONLY BE PLUGGED INTO AN OUTLET DURING STEP 27!

Step 25:

Strip 3/16" off the ends of the low voltage wire and twist
tightly. Attach these ends to the 18VAC terminals located
on the POWER IN terminal block (see illustration at

right). Be certain not to let the exposed wires touch
each other!

Insert one transformer wire into an 18VAC terminal.
Insert the other transformer wire into the remaining
18VAC terminal. The transformer wires can be connected
to the 18VAC terminals regardless of color.

  

  
  

18VAC SOLAR

~~ – +

RED

RED

BLACK

BLACK

RED

FIRST OPERATORPOWER IN

  

 

BLK

ORG

BLU

GRN

CLS EDG

OPN EDG

SECOND OPER

RE

Tighten set screws against exposed end of wires. A dab of
household petroleum jelly on each terminal will help
prevent corrosion.

21

Power Cable

from First Operator

Low Voltage Wire

from AC Transformer

Spade Tongue Terminal
(not provided)

Step 26

1

Strip

/2" of insulation from the ends of the low

voltage wire. Attach these stripped ends to the
transformer terminals; red wire to RED,
black wire to BLK.

A dab of household petroleum jelly on each terminal
will help prevent corrosion.

We suggest crimping a spade tongue terminal (not
provided) to the end of each wire before attaching it
to the transformer.

Make sure the exposed wires do not touch each
other!

Step 27

Plug the transformer into the electrical outlet.
(Use of a surge protector with the transformer is strongly
recommended.)

HINT: Keep a few mothballs in the control box to
discourage insects from entering it and damaging the
control board.

Step 28

Turn control box ON.

Transformer

SURGE PROTECTOR

22

CONTROL BOARD SETTINGS

DIP switches

The four DIP switches on the control board match the opener with the type of gate on which it is
installed. For example, gates may pull-to-open or push-to-open. Prior to packaging, the Mighty Mule
Gate Opener® control board was configured for single swing gates that pull-to-open (open into the
property). If your gate type matches this configuration, you DO NOT need to adjust the DIP switches;
proceed to the Potentiometers section on the next page.

NOTE: To change the DIP switch settings, you must turn the
control box power switch OFF; move the switch; then turn the
power back ON. Use a small screwdriver to move the switches.

PULL/PUSH: Set to PULL for swing gates that pull-to-open
[factory setting]; PUSH for swing gates that push-to-open (see

Push to Open Installation on pages 29-30).
NOTE: The direction a gate opens is determined by standing

inside the property and facing toward the gate.

SNGL/DUAL: Set to SNGL for a single gate leaf [factory
setting]; DUAL not applicable.

SEQ1: Not applicable (the factory setting is OFF).
SEQ2: Not applicable (the factory setting is OFF).

DIP switches

PULL/PUSH

SNGL/DUAL

SEQ1
SEQ2

ON

OBSTRUCT

MIN MAX

1234

LEARN

SENS.

18VAC SOLAR
~ ~ – +

POWER IN

–

BATT

+

CLS EDG

GRN

BLU

ORG

BLK

RED

FIRST OPERATOR

PWR. SW.

OPN EDG

OPN EDG

CLS EDG

GRN

BLU

ORG

BLK

RED

SECOND OPERATOR

STATUS

ALARM

PULL/PUSH
SNGL/DUAL

SEQ1
SEQ2

BLU

ORG

GRN

ACCESSORY

AUTOCLOSE

OFF

MIN

MIN

R

WHT

60

120

INERTIA

MAX

OBSTRUCT
SENS.

MAX

LEARN

G

B

RCVR

23

Potentiometers

The three (3) potentiometers on the control board operate like a volume control on a radio. They control
the auto close timer, inertia, and obstruction sensitivity of the opener. Use a small slotted screwdriver to
turn the arrow in the center of the potentiometer. Clockwise rotation increases the setting (MAX).
Counterclockwise rotation decreases the setting (MIN).

PULL/PUSH

SNGL/DUAL

SEQ1
SEQ2

ON

R B G

RCVR

AUTOCLOSE

OFF 120

INERTIA

MIN

OBSTRUCT
SENS.

MIN MAX

1234

LEARN

AUTO CLOSE (auto close timer): Determines how long the gate will

60

remain open before it automatically closes. The limits are OFF to 120
seconds. The factory setting is OFF.

INERTIA: Fine tunes obstruction sensitivity in the opening and
closing modes. INERTIA allows the opener to attempt to push an
obstruction clear of the gate path. When INERTIA is set to MIN the
opener will obstruct quickly (i.e, will attempt to push against an

MAX

obstruction briefly); when set to MAX, the opener will obstruct slowly
(i.e., will push against an obstruction for a longer period). The factory
setting is MIN.

OBSTRUCT SENS. (obstruction sensitivity): Determines the amount
of force exerted by the gate on an obstruction before the opener stops
and reverses. The gate will exert minimum force before obstructing
when set to MIN. When set to MAX, the opener will exert maximum
force before obstructing (i.e., the opener will require greater resistance
before stopping and reversing.). The factory setting is MIN.

READ WARNING BELOW!

NOTE: Heavy gates and gates with high wind resistance may require

the OBSTRUCT SENS. potentiometer to be set closer to MAX to
prevent the opener from obstructing. Keep in mind, however, that
while you must determine the best setting for smooth gate operation,
you must ALSO determine the lowest possible setting for safe gate
operation.

ALWAYS KEEP SAFETY AT THE TOP OF YOUR LIST WHEN ADJUSTING OR

SERVICING YOUR AUTOMATIC GATE OPENER!

WARNING!

All three potentiometers were set to minimum at the factory. The OBSTRUCT SENS.
potentiometer MUST be adjusted above the factory setting for your Mighty Mule Gate
Opener® to function properly. If the potentiometer is left at MIN, your gate opener may
"obstruct" (i.e., stop and reverse) as soon as it is activated.

BE SURE TO PROPERLY RETEST THE GATE OPENER AFTER MAKING ANY
ADJUSTMENTS; FAILURE TO DO SO MAY RESULT IN SERIOUS INJURY OR
DEATH!

24

Setting Your Personal Transmitter

, Inc.

Code

All GTO transmitters are set to a standard code at the factory and are ready to operate your Mighty Mule Gate Opener®.
For your safety and security, however, we strongly recommend that you replace the factory setting with your own personal
code. Follow the directions below:

1. Remove the Transmitter
Cover

Grasp the sides of the access cover and slide it away from the transmitter
button (see illustration). When the access cover is removed, the battery
and the DIP switches will be exposed. To set a new code, use a small
screwdriver to move the switches.

, Inc.

, Inc.

2. Set the transmitter DIP Switches

There are nine (9) transmitter DIP switches; each can be placed in three different positions (+, 0, –). DO NOT set all the
switches in the same position, such as all +, all 0, or all –. Once the DIP switches have been set to a personal code, replace
and close the access cover.

WARNING: No other adjustments should be made inside the transmitter.

25

3. “Teach” the New Code to
Control Board Memory

STATUS

AUTOCLOSE

60

A. Turn control box power switch OFF.
B. Unscrew and remove the control box cover.
C. Press and hold the LEARN button on the control board,

and turn the power switch ON. Release LEARN button.
Wait 15 seconds for the receiver to charge.

D. Press and hold transmitter button until the red STATUS

LED comes ON.

E. Release transmitter button. The new code is stored in

control board memory.

Mounting the Receiver

Use the transmitter to check the range of the receiver before permanently mounting it.

Consider the following when mounting the receiver:

STATUS LED

LEARN BUTTON

PULL/PUSH

SNGL/DUAL

SEQ1
SEQ2

ON

R B G

RCVR

OFF 120

INERTIA

MIN

OBSTRUCT
SENS.

MIN MAX

1234

LEARN

MAX

• Standard receiver cable length is 10 feet (receivers with a longer cable are available as
special order items; call the GTO Sales Department). NEVER splice receiver cable!

• Run the cable through PVC conduit to protect it from damage.

• DO NOT run cable through metal conduit because the receiver signal range will be
decreased.

• DO NOT run cable in conduit containing ac wiring.

• DO NOT mount receiver on a metal fence or post; doing so will decrease signal range.

• The receiver range can vary from 50 to 100 feet depending upon weather, topography,
and external interference.

FCC Regulation

This device complies with FCC rules Part 15. Operation is subject to the following conditions:

1. This device may not cause harmful interference.

2. This device must accept an interference that may cause undesired operation.

Transmitter distance may vary due to circumstances beyond our control. NOTE: The manufacturer is not

responsible for any radio or TV interference caused by unauthorized modifications to this equipment.
Such modifications could void the user’s authority to operate the equipment.

26

Connecting Additional Safety Devices

Although GTO strongly recommends the use of additional safety devices, we

do not endorse any specific brand names. Only use products that are certified

and listed to be in compliance with UL (United Laboratories) and national

and regional safety codes.

Call GTO Sales at 1-800-543-4283 for information on compatible

products for your specific application.

The Mighty Mule E-Z Gate Opener is equipped with built-in obstruction sensitivity. The opener is designed to stop and
reverse within 2 seconds when it comes in contact with an obstruction. However, obstruction sensitivity, even when properly
adjusted, may not be sensitive enough to prevent bodily injury in some circumstances. To augment your protection against
entrapment, GTO suggests using safety edge sensors or photoelectric sensors. When installed, safety edge sensors (or
photoelectric sensors) must be mounted in compliance with UL 325, Underwriters Laboratories safety standard for gate
openers. Review page 5 for information about mounting requirements for safety edges ("contact sensors") and photoelectric
sensors ("non-contact sensors").

Refer to the sensor manufacturer’s instructions for information about installing these devices on a vehicular gate.

Make sure the control box power switch is OFF before connecting safety device wiring to the terminal blocks.

Insert the safety device wires into the CLS EDG terminal on the FIRST OPERATOR terminal block for the gate closing
mode. Connect the safety device ground wire to the GRN terminal. Connect the safety device wires for the gate opening
mode to the OPN EDG terminal in the same manner.

SEQ1
SEQ2

ON

LEARN

18VAC SOLAR

~~ – +

Power Cable

from First Operator

Wire from Close Safety Edge

or Photoelectric Sensor

RED

BLK

Ground Wire

ORG

BLU

GRN

CLS EDG

OPN EDG

RED

BLK

ORG

BLU

GRN

CLS EDG

OPN EDG

SECOND OPERATORFIRST OPERATORPOWER IN ALARM ACCESSORY RCVR

Ground Wire

Wire from Open
Safety Edge or Photoelectric Sensor

GRN

ORG

BLU

WHT

R B G

PLEASE NOTE: Safety edge sensors and photoelectric sensors are neither included with nor required for the Mighty Mule
E-Z Gate Opener.

27

Connecting Accessories

Make sure the control box power switch is OFF before connecting accessories.

The ACCESSORY terminal block is the connection point for accessories such as keypads, push buttons, safety loops,
intercoms, etc. The ACCESSORY terminal marked GRN (green) is the common ground for all accessories. GRN is paired
with the terminals shown below when connecting accessories to the control board.

IMPORTANT: Make sure to twist the exposed wires tightly and insert them into the terminals without loose strands.

Tighten the set screws against the exposed end of the wires. A dab of household petroleum jelly in each terminal will help
prevent corrosion.

WHT (white) used with
GRN (green):

Functions as a normally open contact. This is the most frequently used
pairing for a doorbell button, keypad, or key switch.

First contact will start the gate.
Second contact will stop the gate.
Third contact will reverse the gate.

Keypad, or Key Switch

NOTE: Never use a lighted doorbell button!
The battery will discharge and the gate opener
will fail to operate.

BLU (blue) used with
GRN (green):

Functions as a normally open contact. This pairing is typically
used for free entry and free exit devices.

First contact will open the gate.

Low Voltage Wire

from Doorbell Button,

SEQ1
SEQ2

ON

BLK

ORG

WHT

GRN

ALARM ACCESSORY RCVR

ORG

GRN

ALARM ACCESSORY RCVR

SEQ1
SEQ2

BLU

WHT

R B G

ON

R B G

LEARN

LEARN

NOTE: If the gate is in the open position and begins to close, the
activation of the accessory device will reopen the gate. In
communities where the use of a emergency entry device is
mandatory, it should be connected to these terminals.

ORG (orange) used with
GRN (green):

Functions as a normally open contact. This pairing is frequently used
for safety loops.

This connection will not open your gate. The safety loop will
activate only while the gate is in use. When using this combination,
the gate will remain open or reopen if it is closing.

28

Low Voltage Wire

from Free Entry or

Free Exit Devices

Low Voltage Wire

from Safety Loops

SEQ1
SEQ2

ON

BLU

ORG

WHT

GRN

ALARM ACCESSORY RCVR

R B G

LEARN

Push to Open Installation

Determining The Mounting Position
of The Post Bracket Assembly

Swinging gates shall not open into public access areas!

A "Push-to-Open" gate opens out from the property.

A Push-to-Open Bracket is required for this type of
installation (see Accessory Catalog). If you have a pull-to-open

gate (gate opens into the property), return to page 13; step 3.

The opener is installed while the gate is in the closed position.

Step PTO-1:

With the gate closed, adjust the post bracket assembly and the gate
bracket until the opener is level. While holding the opener level,
use C-clamps to temporarily keep the post bracket assembly and
gate bracket in their respective positions on the fence post and gate.

Center of Gate Hinge

4 1/2"

3/8" x 2" Bolt

Post Bracket

Post Pivot Bracket

Post Bracket

Post Bracket Assembly

Open Position Stop

Extended Position (gate open)

3/8" Washer
3/8" Lock Washer
3/8" Nut

o

90

4 1/2"

Special Post Pivot Bracket for

Push-to-Open Installation

Step PTO-2:

While gate is closed, stand inside the property next to the
fence post. Using the setback template (insert) measure

4 1/2" back from center of gate hinge, then make a 90º angle
toward the gate and measure 4 1/2". This is the point where

either one of the holes at the end of the post pivot bracket
should be. You will need to rotate the post pivot bracket or
the entire post bracket assembly to align it with the square
angle of the template.

NOTE: If you move the post pivot bracket, be sure that one
of the post bracket holes is aligned with the rest of the
assembly. Flipping the Post Pivot Bracket gives more

position options.

After verifying that you have complied with the

1

4

/2" x 4 1/2" setback, insert the 5/16" x 1 3/4" bolt through
the aligned holes of the post bracket and post pivot bracket
and fasten it with the 5/16" washer and nut.

Retracted Position (gate closed)

Closed Position Stop

Round Post

Post Pivot Bracket can be moved to
achieve the 4 1/2" x 4 1/2" dimensions.

29

Step PTO-3:

Stroke Adjustment Knob

With the gate in the fully closed position and the opener retracted, swing the opener to the gate. Mark reference points for
bolt holes on gate cross member through middle of gate bracket slots. The opener must be level. (Some vertical adjustment is

possible by sliding the post bracket assembly up and down.) Drill 3/8" holes into the gate cross member as marked. Fasten
gate bracket to cross member using (2) 3/8" x 3" bolts, washers, lock washers, and nuts. Attach the opener to the post bracket
assembly and gate bracket using clevis pins, washers, and hairpins clips.

Fence Post

LEVEL

Gate Post and Gate Cross Member
(In Closed Position)

Operator

LEVEL

POST PIVOT BRACKET level with the
horizontal surface of the GATE BRACKET

Step PTO-4:

Make sure the control box power switch is OFF. Use a small
screwdriver to move the PULL / PUSH DIP switch from the
factory setting to PUSH. Replace control box cover. Turn
power switch ON. The control board is now configured to push
the gate open.

Step PTO-5:

Press the transmitter to activate the opener and
determine the degree of gate opening. Initially, the

push-pull tube will extend only 7 1/2" until it is adjusted
(see below right). The maximum extension of opener is
11 1/2".

LEVEL

OBSTRUCT
SENS.

PULL/PUSH

SNGL/DUAL

SEQ1
SEQ2

ON

MIN MAX

1234

LEARN

Stroke Adjustment for Push-to-Open Installation

Step PTO-6:

To increase the degree of gate opening, loosen the
stroke adjustment knob on the bottom of the opener

housing and move it about 1/8" toward the gate bracket

Figure A

Moving knob toward gate
bracket increases gate
opening.

(see Fig. A). Finger tighten the knob–DO NOT USE
PLIERS OR OTHER TOOLS TO TIGHTEN KNOB.

Press the transmitter to check your adjustment. To
decrease the degree of gate opening, move the stroke
adjustment knob away from the gate bracket (see Fig B).

Step PTO-7:

Moving knob away from
gate bracket decreases
gate opening.

Figure B

Repeat the procedure in step PTO-6 until the gate stops firmly
(but not sharply) against the open position stop plate. The
motor will continue to run for one-half second after the gate
opens against the stop plate. If the motor continues to run for
more than one second, the push-pull tube is overextended and further adjustment is necessary. If the motor strains too long
against the stop plate, the fuse on the control board (above FIRST OPERATOR terminal) will be blown. This blade-style
15 ampere fuse (sold by most automotive supply stores) can be easily replaced. NEVER use a fuse rated higher than 15

amperes!

NOTE: Each time you adjust the knob, finger tighten it before pressing the transmitter button to check your adjustment.

30

Maintenance & Troubleshooting Guide

If your gate opener does not function properly after it is installed, use this guide before calling the GTO Service Department.

• On all gates weighing 250 lb. or more, routinely grease the ball bearing hinges at least 4 times a year; more
frequently if the gates are near a coastal area.

• Keeping a few mothballs in the control box will discourage insects from entering it and damaging the control
board.

• Clean the push-pull tube with a soft, dry cloth and apply silicone spray to it at least once per month.

If the Opener Does Not Work

Check the Green LED on the Control Board:

IF THE LED IS OFF: This condition indicates a transformer power failure.

1. Test the transformer for voltage with a voltmeter. The acceptable range can be found in the VOLTAGE
LIMITS chart on the next page. If the transformer test shows no voltage, then test the electrical outlet for
voltage. If the outlet test shows voltage, then the transformer is dead and must be replaced. Allow the new
transformer 12 hours to charge the battery before using the gate opener.

2. If the transformer test shows voltage, check the POWER IN terminal block on the control board for voltage.
If the terminal block shows no voltage, look for broken or spliced wires.

Check the Red STATUS LED on the Control Board:

IF THE LED IS ON: but the unit is not working.

1. Check the battery in your transmitter and replace with a fresh one if needed..

2. Verify that the power cable is securely connected.

3. Replace the control board fuse if it is blown (15 ampere fuse only - DO NOT USE
A HIGHER RATED FUSE!).

IF THE LED IS OFF:

1. Make sure the ON / OFF switch at the bottom of the control box is set to ON.

2. Check all connections for looseness and corrosion.

IF THE LED IS FLASHING:

The system may be in a condition known as "low voltage lockout" (i.e., inadequate voltage supplied for the gate opener to
function).

1. Test (using a voltmeter) the voltage output of the transformer (18.0 to 22.0 Vac) or solar panel
(18.0 to 22.0 Vdc) at the control board power terminal block.

A. If the voltage is low or not reading, load test the battery at a electronics store and call your dealer for a

replacement battery if necessary.

B. If the voltage is low or not reading, test the transformer and electrical outlet. Replace the transformer if

necessary and let the battery recharge for 12 hours before using the gate opener.
C. Check the control board for damage or corroded connections.
D. Make sure that telephone or solid core wire is not being used to connect the transformer to the control

board.

31

If the Opener is Working

The Gate CLOSES Then Opens Again on its Own:

1. Check the position of the mounting brackets and readjust if necessary.

2. Check the gate for binding or hinge damage.

3. Check the position of the stroke adjustment knob.

The Gate OPENS Then Closes Again on its Own:

1. Check the position of the mounting brackets and readjust if necessary.

2. Check the gate for binding or hinge damage.

3. Check the position of the stroke adjustment knob.

VOLTAGE LIMITS

18 Vac Transformer __________________________18.0 to 22.0 Vac

5 W Solar panel (single) _______________________18.0 to 22.0 Vdc 300 mA

measure voltage at panel and control box.

12 V Battery ________________________________12.0 to 13.5 Vdc 7.0 Ah

Charging circuit _____________________________12.0 to 14.8 Vdc

measure voltage with battery connected

The GTO, Inc. Technical Service Department is open

Monday – Thursday 7:30 A.M. – 5:30 P.M.

and Friday 8:00 A.M. – 12:00 P.M. (Eastern Time)

Telephone [phone]
Telephone [phone]

Fax [phone] • Web site: www.gtoinc.com

E-Mail: [e-mail]

32

Warranty and Repair Service

®

If your Mighty Mule Gate Opener

1. First use the procedures found in the Maintenance & Troubleshooting Guide (see page 31).

2. If you are unable to solve the problem, call the GTO Service Department at [phone], or [phone].

Refer to the serial number (located on the control box cover) and date of purchase when calling for assistance.

3. If repair or replacement of your gate opener is necessary, the Service Department will assign a Return Goods
Authorization (RGA) number to you.

4. Securely pack the component(s) authorized for return to the factory. Write the RGA number issued to you on the outside
of the package in LARGE BOLD PRINT. Ship the package(s) freight prepaid to:

GTO, Inc., 3121 Hartsfield Road, Tallahassee, Florida, USA 32303.

NOTE: Products returned to GTO without a Return Goods Authorization (RGA) number in LARGE
BOLD PRINT on the outside of the package WILL NOT be accepted. Also, items returned to GTO freight
collect WILL NOT be accepted.

is not operating properly, please follow the steps below:

AUTOMATIC GATE OPENER

One Year Limited Warranty

Your Mighty Mule Gate Opener® is warranted by the manufacturer against defects in materials and
manufacturer workmanship for a period of one (1) year from date of purchase, provided the recommended

installation procedures have been followed.

In the case of product failure due to defective material or manufacturer workmanship within the one (1) year
warranty period, the opener will be repaired or replaced (at the manufacturer's option) at no charge to the
customer, if returned freight prepaid to GTO, Inc., 3121 Hartsfield Road, Tallahassee, Florida, USA

32303. IMPORTANT: Call [phone] or Fax [phone] for a Return Goods Authorization
(RGA) number before returning item(s) to the factory. Products shipped to the factory without an RGA

number will not be accepted. Replacement or repaired parts are covered by this warranty for the remainder
of the one (1) year warranty period or six (6) months, whichever is greater. GTO will pay shipping costs
(equal to United Parcel Service ground rate) for return to owner of item(s) repaired under warranty.

The manufacturer will not be responsible for any damage or cost incurred in the removal of the defective
parts for repair, or for the reinstallation of those parts after repair. This warranty shall be considered void if
damage to the product was due to improper installation or use, tampering, connection to an improper power
source, or if damage was caused by lightning, wind, fire, flood, insects, or other natural agent. This warranty
gives you specific legal rights, and you may also have other rights which may vary from state to state. This
warranty is in lieu of all other warranties, either expressed or implied. NOTE: Verification of the

warranty period requires copies of receipts or other proof of purchase. Please retain these records.

After the one (1) year warranty period expires, GTO (or one of its authorized service centers) will perform
necessary repairs for a nominal fee. Call GTO at [phone] or [phone] for more information.

33

Column Installation Information

IF THIS OPENER WILL BE USED WITH GATES THAT ARE MOUNTED ON

MASONRY, BRICK, OR ROCK (etc.) COLUMNS:

READ THE FOLLOWING CAREFULLY BEFORE PROCEEDING

Attaching a gate opener to a gate mounted on a masonry column requires special procedures.

Here's how to check your installation to minimize problems:

Open the gate to the 90º position, then measure the distance between the back of the gate and the face of
the column. If there is at least a 6 1/4" clearance, you may not have to make any special modifications.
However, you must measure the post pivot bracket position using 4 1/2" x 4 1/2" setback, as described on
page 13 of this manual, to verify that the gate hinge sits far enough from the column to give your
installation the proper setback distance.

If you do not have the proper clearance or setback distance, the opener may operate the gate for a while, but eventually
the unit will become nonfunctional. To prevent this problem, we suggest the following installation method:

A. The simplest solution is to install the opener in a push-to-open configuration (requires Push-To-Open Bracket,

see Accessory Catalog). The crucial 4 1/2" setback is easier to achieve and clearance is no longer a problem,
since the opener will be pushing the gate away from the column instead of pulling it toward the column. It is
recommended that you place a steel plate between the opener mounting brackets and masonry surface for
additional strength.

B. If a push-to-open installation is impossible due to traffic hazards, terrain, etc., another option is to re-hang the

gate. You may hang it on a post, either in the center of the column or at the back corner, or move the gate to the
back corner of the columns.

C. The most difficult solution is to cut a notch in the column to accommodate the opener and power cable. This

job is NOT for the inexperienced!

Because of the difficulty associated with column installations, we STRONGLY advise you to call the GTO
Service Department at [phone] or [phone] for assistance prior to your installation.

34

AUTOMATIC GATE OPENER

Accessory Catalog

35

These Accessories are Available From Your Retail Store

Solar Panel (FM121) (has a 2 year warranty)

The Solar Panel is a solar powered battery

charger for use with the Mighty Mule

Automatic Gate Lock
Pull-to-Open (FM143)

IC

T

A

K

M

C

E

IV

O

TO

DR

U

L

A

ID

E

O

T

N

A

E

L

G

O

S

IC

N
O
R

T

EC

L

E

A MUST for securing the gate
against forced entry or exit.
Solenoid driven, plated steel bolt
lock with a zinc plated steel
housing. The horizontal electronic
lock is used with the Mighty

Mule® system for maximum

stability and security.
Recommended for gates over 8 feet
long or where high winds are
common.

GTO Digital Keypad (FM137)

The specially designed digital keypad can be
easily installed as a wireless or wired keypad. It
can be programmed to use up to fifteen different
personal identification number (PIN) codes. Each
code is face programmable with additional
security features built in. Requires 3 AA batteries
(not included).

opener system. Particularly suited for remote
installations, the Solar Panel comes with

tubular steel support, mounting clips, wire
connectors, and 8 ft. of low voltage wire (for
longer length wire, see RB509 below). The
Mighty Mule® control board has clearly labeled
terminal connections for easy installation of the

Solar Panel. Installation in some regions of the
world may require dual solar panels for adequate
charging power.

Mighty Mule
Entry Transmitter (FM135)

The Mighty Mule® entry transmitter, with
adjustable code settings, is standard equipment
with Mighty Mule® systems. Battery included.

®

gate

Push Button (Doorbell)
Control (FM132)

Unlighted doorbell button for
remote entry or exit
control. Connects directly to the
control board and uses
16 gauge, multi-stranded low
voltage wire (not included).

Pin Lock (FM133)

The Pin Lock substitutes for the clevis
pin at the front mounting point of the
opener. Helps prevent theft of the opener
from the gate, while allowing quick
release of the opener.

Key Chain Mini Transmitter (FM134)

The Key Chain Mini Transmitter is a miniature
version of the Mighty Mule® entry transmitter and
has the same adjustable code settings. Battery included.

Low Voltage Wire (RB509)

The 16 gauge, multi-stranded, dual conductor Low Voltage
Wire connects the AC powered transformer or the solar

powered battery charger (Solar Panel) to the control board.
Also used for the connection of accessories, such as locks,
keypads, push buttons and other wired control devices. This
specially designed wire is UV treated, PVC coated and ready
for direct burial. Available in 1000' rolls or special lengths.

Gate Opening Sensor (FM138)

The Gate Opening Sensor is designed for residential and
agricultural applications and is compatible with the Mighty
Mule automatic gate opener models. The Gate Opening
Sensor is an electromagnetic sensor, which offers 'hands free'
operation of the Mighty Mule Automatic Gate Opener with a
12 ft. radius of detection of vehicles in motion.

36

The Following Accessories Are Available Through Your

Retail Store's Special Order Desk.

RECEIVER

M

O

DEL 294

UN

H

EDDOLF

IVERSA

L

Garage Door Receiver (RB709)

The Garage Door Receiver allows you to use the same Mighty
Mule® entry transmitter (see dual and triple transmitters) to

operate your gate opener and your garage door opener. Compatible
with most garage door openers.

Push To Open Bracket (348IH)

Required when the Mighty Mule Gate Opener® must push the gate open, such as
on a sloping driveway, or where space prevents gate from being pulled open.

Dual Transmitter (RB742)

The Dual Transmitter is a two button transmitter for remote
control of two separate gate openers, or a gate opener and
garage door opener (see Garage Door Receiver). Battery
included.

Triple Transmitter (RB743)

The Triple Transmitter is a three button transmitter for
remote control of three separate gate openers and/or garage
door openers (see Garage Door Receiver). Battery
included.

Column Mount Lock Receiver (433IH)

For mounting the Automatic Gate Lock (FM143) on
brick columns, walls, or for other applications with limited
space between gate and post.

Power Cables

The AW201 four and one-half foot power cable is included with Mighty
Mule gate opener systems.

The AW240 forty foot power cable allows you to mount the control box in
a remote location.

Replacement Transformer (RB566)

Standard 18 volt AC transformer for maintaining the battery included with the Mighty Mule® gate
opener. This is the only transformer approved for use with the Mighty Mule®.

If you have a question about any special order item,

just call 1-800-543-GATE!

37

The Following Replacement Parts Are Available Through

Your Retail Store's Special Order Desk.

Replacement Battery (RB500)

Standard 12 volt, 7.0 ampere-hour, maintenance-free battery for the Mighty Mule gate opener.
Only this battery is approved for use with the Mighty Mule. Battery life 3 to 5 years.

24 Amp Hour Battery Kit (FP296)

This large 12 volt, 24 ampere-hour, maintenance-free battery is for the
Mighty Mule gate operators. It will supply additional power for increasing
the number of open and close cycles. The kit comes with the battery and
wiring harness for easy installation. Battery life 3 to 5 years. Enclosure not
provided.

AUTOMATIC GATE OPENER

For sales call toll free:

1-800-543-GATE

For technical service Call toll free:

1-800-543-1236

Mighty Mule® Limited One Year Warranty:

GTO, Inc., gate openers and accessories are warranted by the manufacturer against defects in materials and
manufacturer workmanship for a period of one (1) year from date of purchase, provided the recommended

installation procedures have been followed.

In the case of product failure due to defective material or manufacturer workmanship within the one (1) year
warranty period, the product will be repaired or replaced (at the manufacturer’s option) at no charge to the
customer, if returned freight prepaid to GTO, Inc., 3121 Hartsfield Road, Tallahassee, Florida, USA 32303.

IMPORTANT: Call [phone] or Fax [phone] for a Return Goods Authorization (RGA)
number before returning accessory to factory. Products received at the factory without an RGA number

will not be accepted. Replacement or repaired parts are covered by this warranty for the remainder of the one
(1) year warranty period or six (6) months, whichever is greater. GTO, Inc. will pay the shipping charges
(equal to United Parcel Service GROUND rate) for return to the owner of items repaired under warranty.

The manufacturer will not be responsible for any charges or damages incurred in the removal of the defective
parts for repair, or for the reinstallation of those parts after repair. This warranty shall be considered void if
damage to the product(s) was due to improper installation or use, connection to an improper power source, or if
damage was caused by lightning, wind, fire, flood, insects or other natural agent.

After the one (1) year warranty period, GTO, Inc. or one of its authorized service centers will make any
necessary repairs for a nominal fee. Call GTO at [phone] for more information. This warranty gives
you specific legal rights, and you may also have other rights which may vary from state to state. This warranty
is in lieu of all other warranties, expressed or implied. NOTE: Verification of the warranty period requires

copies of receipts or other proof of purchase. Please retain these records.

GTO, Inc.

3121 Hartsfield Road • Tallahassee, Florida, USA 32303 • [phone] • Fax [phone] • Web site www.gtoinc.com

38