Mighty Mule FM350 User Manual

Installation Manual

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 Gates That Open, LLC, 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 Gates That Open, LLC, 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.

GTO Sales: 850-575-0176 • Fax [phone]

GTO Technical Service 850-575-4144

For 24 hour/day, 7 day/week Technical Service visit http://support.gtoinc.com

For more information on Mighty Mule’s full line of Automatic Gate Openers and Access Controls visit www.mightymule.com

Printed in China for Gates That Open, LLC.

rev 07.16.12

Class Rating

The Mighty Mule Gate Opener is intended for use with vehicular swing gates in single family
residential applications. The opener is system certified to be in compliance with UL 325, current

edition, as of publication date.

Vehicular Gate Opener Class Categories:

Residential Vehicular Gate Opener—Class I: A vehicular gate opener (or system) intended for use in

a home of one-to-four single family dwellings, 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.

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 (°C x 1.8) + 32 deg. Fahrenheit °F
deg. Fahrenheit (°F-32) ÷ 1.8 deg. Celsius °C

FOR YOUR RECORDS

Please record the following information product serial number (located under rear mount on arm), be sure to
keep all receipts for proof of purchase. Refer to this information when calling GTO for service or assistance
with your automatic gate opener.

ii

Serial Number: ___________________________________ Date of Purchase: ________________

Place of Purchase: ___________________________________________________________________

rev 07.16.12

Table of Contents

Gate Opener Class Categories ..................................................................... inside cover

Units and Standards Conversion Chart ........................................................ inside cover

PLEASE READ THIS FIRST! .................................................................... page iv

KEEP THESE INSTRUCTIONS FOR FUTURE REFERENCE

Important Safety Instructions ......................................................................... 1

Disconnecting the Opener ........................................................................................1

Important Safety Instructions for the Consumer ......................................................2

Required Safety Precautions for Gates ....................................................................4

Secondary Means of Protection Against Entrapment ..............................................5

Warning Signs and Labels ........................................................................................6

Technical Specifications .......................................................................................... 7

Before You Begin .............................................................................................. 8

Solar Chart ................................................................................................................8

Check Direction of Gate Swing .................................................................................9

Prepare the Gate .......................................................................................................9

Installation ...................................................................................................... 10

Parts List ..................................................................................................................10

Installation Overview ...............................................................................................12

Installation of Mounting Hardware ..........................................................................13

Mounting the Opener ..............................................................................................17

Installation of the Closed Position Stop ..................................................................17

Powering the System ..................................................................................... 19

Connecting the Battery ...........................................................................................19

Detailed Wire Routing Diagram ..............................................................................20

Connecting the Transformer ...................................................................................21

Connecting Solar Panel(s) ......................................................................................23

Control Board Settings ................................................................................. 23

DIP Switches ...........................................................................................................23

Mounting the Receiver ............................................................................................24

Setting the Closed Position Limit ............................................................................25

Obstruction Sensitivity and Auto-Close ..................................................................26

Personalize Your Transmitter Setting ............................................................ 27

Connecting Accessories .............................................................................. 28

Wiring Accessories .................................................................................................29

Push-to-Open Installation Instructions ......................................................... 31

Maintenance & Troubleshooting Guide ........................................................ 34

Warranty Repairs ............................................................................................. 36

Column Installation Information .................................................................... 37

Accessories .............................................................................................................. 38

PLEASE READ THIS FIRST

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 Specications 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 auto­close 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.

iv

NEVER USE TRANSFORMER AND SOLAR PANEL(S) AT THE SAME TIME!

It will damage the control board

rev 07.16.12

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 automated 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
identifies conditions that can result in damage to the opener or its components, serious injury, or
death.

Because 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.

warning symbol. The symbol

How To Manually Open and Close the Gate:

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

ONLY disconnect the opener when the opener power switch is OFF and the gate is NOT moving.

Because the Mighty Mule gate opener is battery powered, disconnect the opener ONLY when the
power switch on the control box is turned OFF. Unplugging the transformer does not turn power to the
opener OFF.

Front Mount

Clevis Pin

Gate Bracket

Disconnecting the Opener

1. Turn opener power switch (Control Box) OFF.

2. Remove hairpin clip, clevis pin, and bushing
from the front mounting point.

3. Remove the opener from the mount

Bushing

Hairpin Clip

NOTE: Substitute a Pin Lock [FM133] for the clevis pin on
the front mount of the gate opener to prevent unauthorized
removal of the opener from the gate.
(See accessories on pg. 38)

rev 07.16.12

1

IMPORTANT SAFETY INSTRUCTIONS

Gate in the
Open Position

ZONE 2

ZONE 3

ZONE 4

ZONE 5

Driveway

ZONE 1

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 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 trafc 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 (page 1).

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

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.

Entrapment Zones for a proper Pull-To-Open installation:

Zone 1 – leading edge of the gate.
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, etc.
Zone 5 – pinch points between the opener and gate.

2

rev 07.16.12

IMPORTANT SAFETY INSTRUCTIONS

Moving Gate

Area

Driveway

10'

10'

10'

10'

NEVER INSTALL

any control device

within gray area

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 ngers or hands could be pinched.

3. Devices such as contact sensors (safety edges) and non contact sensors (photo beams) provide additional
protection against entrapment.

4. If push buttons or keypads 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.

III. After Installation

1. Attach the warning signs (included) to each side of the gate to alert the public of auto matic 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 an activated 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” (drive through) 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 ALL
gate controls away from children and unauthorized users; store controls where children and unauthorized users do
not have access to them.

6. KEEP GATE AND GATE OPENER PROPERLY MAINTAINED. Always turn power to opener OFF before
performing any maintenance. Regularly grease the gate hinges. Apply silicone spray to a soft, dry cloth and clean
the push-pull tube at least once a month.

rev 07.16.12

3

IMPORTANT SAFETY INSTRUCTIONS

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

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

9. Make arrangements with local re and law enforcement for emergency access.

10. Distribute and discuss copies of the IMPORTANT SAFETY INSTRUCTIONS section of this manual with all
persons authorized to use your gate.

11. 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 mightymule.com,

or by contacting Gates That Open, LLC., 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.

Required Safety Precautions for Gates

Install Warning Signs

Warning signs alert people of automatic gate operation and are required when installing the Mighty Mule Gate Opener.
The warning signs included must be installed on both sides of each gate. Furthermore, a walk-through gate must be
installed if pedestrian trafc is expected near the vehicular gate.

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 enhanced protection against
entrapment.

Pedestrian Gate Lock

(recommended, not included)

Pedestrian Gate

Photo Beam (R4222)

(recommended, not included)

Warning labels should be placed at the locations specified.
If any of them are missing, immediately contact GTO for
replacements.

Contact Sensor

(recommended, not included)

Warning Sign

Vehicular Gate

Contact Sensor

(recommended, not included)

Photo Beam (R4222)

(recommended, not included)

4

rev 07.16.12

IMPORTANT SAFETY INSTRUCTIONS

Vehicular Gate

Leading Edge Contact Sensor

on both sides of the gate

Bottom Edge Contact Sensor

on both sides of the

g

ate

Secondary Means of Protection Against Entrapment

As specied by Gate Opener 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 Gate Opener utilizes Type A, an inherent (i.e., built-in) entrapment
sensing system as the primary type of entrapment protection. Also, the Mighty Mule Gate Opener has provisions for the
connection of Type B2 protection to be used as the secondary type of entrapment protection, if desired.

1. For gate openers 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.

You may want to consider adding photo beams (R4222) to your installation. Photo Beams provide a “non contact” means
of entrapment protection. Call 1-800-543-GATE (4283) for more information.

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

The Mighty Mule Gate Opener is designed to stop and reverse within 2 seconds when the gate comes
in contact with an obstruction. 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 from a hard wired entry/exit source
(e.g. push button control or keypad) and the gate returns to a fully open or fully closed position. Turning
the power switch on the control box OFF and back ON will also deactivate the alarm. Wireless controls
such as transmitters and wireless keypads will not deactivate the alarm.

rev 07.16.12

5

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

Product identification label (1)
installed under rear mount on arm.

Logo and warning labels (2) installed on each side of opener housing

GTO DC SWING SERIES
Conforms to UL325
5th Edition Standards

Serial No.

MM350-

0000000

xxxxxx

Gates That Open, LLC - Tallahassee, Florida USA

!

If any of these signs or warning decals become damaged, illegible or missing, replace them immediately.
Contact GTO at 1-800-543-GATE (4283) for free replacements.

9901178

1-800-543-GATE (4283) • www.mightymule.com

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.

Can Cause Injury or Death

MOVING
GATE!

®

E-Z GATE OPENER

UL325 SERIES

®

350

! !

TO MANUALLY OPEN AND CLOSE THE GATE

1. Turn opener power switch OFF.

2. Disconnect front or rear mount from
mounting bracket.

3. Pull opener away from mounting bracket
and move gate.

Disconnect opener ONLY when the power
switch is OFF and the gate is not moving.

Maximum Gate: 550 lbs. (158.8 kg); 16 ft. (4.9 m) • Voltage: 12 Vdc; Frequency: 0Hz; Power: 25W • Class I Vehicular Swing Gate Operator

IMPORTANT SAFETY INSTRUCTIONS

6

rev 07.16.12

Technical Specifications

Gate Weight

Gate Length

Number of Cycles Per Day

Mighty Mule 350 Gate Capacity /Cycle Chart

Estimated number of daily cycles, based on use with a transformer and one(1) 12 Volt battery.

550 lbs.
450 lbs.
350 lbs.
250 lbs.
150 lbs.
100 lbs.

50 lbs.

125
135
145
155
165
175
185

5’ - 6’

115
125
135
145
155
165
175

8’

115
125
135
145
155
165

10’

115
125
135
145
155

12’

115
125
135
145

14’

115
125
135

16’

NR
NR
NR
NR

NR
NR
NR

NR
NR

NR

MIGHTY MULE 350 GATE OPENER

_____________________________________

DRIVE

• Low friction screw drive (linear actuator) rated for -5 °F to +160 °F (-20 °C to +71 °C).

• Powered by a 12 V motor with integral case hardened steel gear reducer. Motor speed reduced to 260 rpm.

• Maximum opening arc of 110°. Approximate opening time (90°): 18 seconds, depending on weight of gate.

_____________________________________

POWER

• The system is powered by a 12 Vdc automotive or marine battery.

• Battery charge is maintained by a 120 Vac, 18 Vac output transformer (40 VA) through the GTO control board or

by optional GTO Solar Panels; the panel should generate minimum of 5 Watts at 300 mA. IMPORTANT: Never

use both transformer and solar panel— this will damage the battery and control board.

• One (1) blade-style fuse is 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.

_____________________________________

CONTROL

• GTO DIP switches are set for single leaf, pull-to-open gate installations. DIP switches can be adjusted to

accommodate push-to-open gates.

• A circuit on the control board regulates charging. “Sleep draw” is 25 mA; “active draw” is 2 to 5 A.

• Auto-memorization of digital transmitter code.

• GTO RF Receiver tuned to 318 MHz.

• Opener length with push-pull tube fully retracted is 37 1/4", mounting point to mounting point. Maximum stroke
is 19".

• Adjustable auto-close timer (OFF to 3–120 seconds), and obstruction sensitivity (stall force).

• Power terminal block accommodates a transformer or solar panels.

• Accessory terminal block fully compatible with all Mighty Mule access controls.

• 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.

_____________________________________

OPERATIONAL CAPACITY

• The Gate Capacity Chart shows approximate cycles, per day, you can expect from the Mighty Mule Gate Opener
when powered with a transformer. Actual cycles may vary slightly depending upon the type and condition of gate
and installation.

_____________________________________

_____________________________________

_____________________________________

_____________________________________

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

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

To determine the number of cycles the gate opener will perform using solar panels, please see the

rev 07.16.12

7

specications listed on page 8.

* These specifications

are subject to change
without notice.

Before You Begin

1. Determine Charging Options for Battery: Transformer OR Solar

NEVER USE TRANSFORMER AND SOLAR PANEL(S) AT THE SAME TIME!

It will damage the control board!

IMPORTANT:

 •The12voltautomotive/marinebatterymustbechargedbyeitherconnectingthetransformer

(included) or solar panel kit to the control board.

 •Thetransformerisdesignedforindooruse.Ifthetransformercanbepluggedonlyintoan

outside electrical outlet, a weatherproof cover/housing (available at local electrical supply
stores) must be used.

 •Ifyourgateismorethan1000ft.fromanACpowersource,youwillneedtouseatleast5

watts solar charging power to charge the battery. Refer to the Solar Panel and Gate Activity
chart below.

 •AlllowvoltagewireusedwiththeMightyMuleGateOpenermustbe16gauge,dual

conductor, stranded, direct burial wire. Do not run more than 1000 ft. of wire.

Solar Panel and Gate Activity Chart

The table and map illustrate the maximum number of gate cycles to expect per day in a particular area
when using from 5 to 30 watts of solar charging power. The gures 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 and will require additional solar
panels.

NOTE: UP to 250 ft. of 16 gauge dual
conductor, stranded, direct burial wire may
be used to allow installation of solar panels in
direct sunlight.

Solar Charging Options

• 10 Watt Mighty Mule Solar Panel [FM123]

• 5 Watt Mighty Mule Solar Panel [FM121]

(See accessories on pg. 38)

Single Gate Winter Ratings Zone 1 Zone 2 Zone 3

12 v single gate (5 watts) solar charger 4 8 13
12 v single gate (10 watts) solar charger 8 16 26
12 v single gate (15 watts) solar charger 11 20 30
12 v single gate (20 watts) solar charger 14 28 38
12 v single gate (25 watts) solar charger 17 36 46
12 v single gate (30 watts) solar charger 20 44 54

8

rev 07.16.12

2. Check Direction of Gate Swing

Your Property Your Property

The Mighty Mule Gate Opener is designed for PULL-TO-OPEN installations. PUSH-TO-OPEN installations require a
Push-To-Open bracket [FM148]. Push-to-Open Installation Instructions begin on page 31.

Pull-To-Open

(arm retracts to open)

Push-To-Open

(arm extends to open)

3. Prepare the Gate

• 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 arcs without binding or dragging on the ground.

• Note that a gate over 250 lbs. should have ball bearing hinges with grease ttings.

• The gate post should be secured in the ground with concrete so it will minimize twist or ex when the opener is
activated.

• Make sure there is a stable area for mounting the gate bracket (this may require the addition of a horizontal or
vertical cross member).

A

F

E

B

Horizontal Cross Member

C

A – Level D – Posts Secured in Concrete
B – Plumb E – Centerline Mounting
C – Free Swinging F – Good Working Hinges

rev 07.16.12

9

D

Vertical Cross Member

Parts List – Opener and Mounting Hardware

Hairpin Clip (2)

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

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

3/8" x 2" Bolt (1)

3/8" x 2-3/4" Bolt (2)

3/8" x 8" Bolt (4)

8" Nylon Cable Tie (14)

3/8" Washer (9)

3/8" Lock Washer (7)

5/16" Washer (1)

3/8" Nut (7)

5/16" Nut (1)

Hardware Bag Contents

Gate Opener (1)

Gate Bracket (1)

Post Pivot Bracket (1)

3/8" Bushings (2)

Customer Support Card (1)

Post Bracket (2)

Closed Position
Stop Plate (1)

2" Mounting Screw (5)

®

E-Z GATE OPENER

Transformer (1)

10’ Battery Wire
Harness (1)

Warning Signs (2)

Transmitter (1)

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.

Moving Gate Can Cause

Injury Or Death

WARNING

!

Receiver (1)

Installation

Video

Installation Overview for the...

10

rev 07.16.12

Tools and Materials

Tools Needed:

• Power Drill

• Open End Wrenches — 1/2" and 9/16"

• Adjustable Wrench

• 3/8" Drill Bit

• Hacksaw or Heavy Duty Bolt Cutters

• Small Flat Bladed Screwdriver

• Large Phillips Screwdriver

• Tape Measure

• Level

• Wire Strippers

• C-Clamps — small, medium, and large

• Center Punch

• Hammer (for center punch)

• Extra person will be helpful

Materials You May Need for the Installation:

These items are NOT included with the gate opener kit. Some of these items can be purchased separately.

• Low voltage wire [RB509] will be needed to run from the transformer to the opener control board; length
depends upon the distance between the transformer power supply and the control arm.

• If your gate is more than 1000' away from an AC power source you will need to use at least one 5 Watt solar
panel [FM121] to charge the 12 Volt battery.

• PVC conduit for protecting wiring.

• Push-To-Open Bracket [FM148] is required if gate opens out from property.

• Materials to reinforce thin walled tube or panel gates.

• 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.

• Some installations may require mufer clamps for the gate bracket. (page 13)

• Surge protection for transformer. (page 22)

• Weather proof outlet is required if transformer is plugged into outside outlet. (page 22)

• Some types of installations require U-Bolts for closed position stop plate.

rev 07.16.12

11

Horizontal Cross Member

Gate Swings Evenly and Freely
Hung Firmly and Plumb

Receiver

Wood Mounting Plate

Post Bracket Assembly

12 Volt automotive or marine
type battery in weather proof
housing (not included).

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).

10’ Battery Harness

Closed Position 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 for Pull-To-Open Gates

Gate in the

CLOSED POSITION

Pinch Area

Gate in the
OPENED POSITION

Pinch Area

2" minimum

2" minimum

Be sure gate opener
and bracket don't bind.

19” MAX

PUSH-TO-OPEN installation instructions begin on page 31.

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 37 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 bracket [FM148] to properly configure your system. See Push to Open

Installation on page 31 before proceeding.

12

TIP: Turning the pivot

bracket over gives more
hole alignment options
for the post pivot bracket
assembly. You can also
move the entire post
pivot bracket assembly
to different positions
on the gate post to
help achieve the proper
clearances.

rev 07.16.12

Installation of Mounting Hardware

Post 
Bracket

Post 
Pivot Bracket

Metal Plate

Wooden Post

Post
Bracket

Post
Pivot Bracket

Metal Plate

Wooden Post

Thin Walled
Tube Gate

Gate Bracket

Muffler Clamp
(not supplied)

Gate Bracket

Wood or Metal
Reinforcement

(not supplied)

Gate
Bracket

Panel
Gate

1" x 6"

Wood

Reinforcement

INSTALLATION OF MOUNTING HARDWARE

We recommend you position the opener near the centerline of the gate to keep the gate from twisting and exing
and to avoid backsplash from rain water.

The Post Bracket Assembly

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

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 must completely

penetrate the post.

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

The post pivot bracket may not be necessary
on posts larger than 6" in diameter. Fence
posts smaller than 6" in diameter or 6" square
should be made of metal instead of wood to
remain stable while the opener is moving the
gate.

Reinforcing Gates for the Gate Brackets

We recommend using a mufer clamp, 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. Additional hardware may
be needed depending on the installation.

Mufer Clamp for

Gate Bracket

Wood or Metal
Reinforcement

rev 07.16.12

13

1" x 6" Wood

Reinforcement

Install Post Bracket Assembly and Gate Bracket

3/8" x 2" Bolt

3/8" Nut

Post Pivot Bracket

Post Bracket

Post Bracket

3/8" Lock Washer

Post Bracket Assembly

3/8" Washer

Clevis Pin

Hairpin Clip

Post Bracket Assembly

Bushing

Rear Mount

Opener

Clevis Pin

Hairpin Clip

Bushing

Gate Bracket

Front Mount

Level Opener

Fence Post

Gate In Open Position

LEVEL horizontal cross member

Post Bracket Assembly

Gate Bracket

Step 1

Insert the 3/8" x 2" bolt through
the center hole of the post
brackets and post pivot
bracket as shown. Fasten a

3

/8" lock washer, 3/8" washer

3

/8" nut on the end of the

and
bolt. DO NOT overtighten
the nut because the post
pivot bracket will have to be
adjusted later.

Step 2

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

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 FM148. Also,
see Push-to-Open Installation
beginning on page 31.

Step 3

With the gate in the open position (up to 110º from its closed position), and the opener fully retracted, 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.

14

rev 07.16.12

Gate in the

CLOSED POSITION

Pinch Area

Gate in the
OPENED POSITION

Pinch Area

2" minimum

2" minimum

Be sure gate opener
and bracket don't bind.

19” MAX

IMPORTANT: While determining the mounting point for the post pivot bracket assembly, be sure that the

position allows for minimum 2 inches of clearance between the gate and the opener in both the open and closed
positions, as shown in the diagrams below. This clearance will give the opener the most efficient leverage point
for opening and closing the gate and more importantly provides the least possible pinch area.

Step 4

When you feel that you have the best position for the post pivot bracket in the open position, insert the 5/16"
bolt through the aligned holes of the post bracket and post pivot bracket to hold it in place. Remove the clevis
pin from the front mount and while supporting the gate opener, swing the gate and gate opener to the closed
position. With the gate and gate opener in the closed position check the clearance and be sure that the gate
opener is not binding at the post pivot bracket.

If you don't have 2 inches of clearance or the gate opener is binding on the post pivot bracket, remove the 5/16"
bolt and readjust the pivot bracket until you can achieve these important clearances.

With the post pivot bracket in the optimum position for clearance and freedom of movement, reattach the opener
to the gate bracket in the open position and recheck the gate opener level and make sure the brackets are
clamped securely.

TIP: Turning the pivot bracket over

gives more hole alignment options for
the post pivot bracket assembly. You
can also move the entire post pivot
bracket assembly to different positions
on the gate post to help achieve the
proper clearances.

rev 07.16.12

15

Installing the Post Bracket Assembly and Gate Bracket

Round Tube & Chain Link Gate

Square Tube Gate

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

Remove excess bolt length
with hacksaw or bolt cutters

FRONT VIEW

SIDE VIEW

FRONT VIEW

SIDE VIEW

Round Metal Post

Round Wood Post

Square Metal Post

Square Wood Post

SIDE VIEW

TOP VIEW

EXAMPLES

Post Bracket
Assembly

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

Gate In Open Position

LEVEL horizontal cross member

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

Step 1

Mark reference points for bolt holes on the fence post
through middle of bracket slots. Mark reference points
for bolt holes on the gate cross member through middle
of gate 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 2

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

Step 3

Fasten post bracket assembly to the fence post using
(4) 3/8" x 8" bolts, washers, lock washers, and nuts

(provided).

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 4

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

bracket using (2) 3/8" x 2 3/4" bolts,
washers, lock washers, and nuts
(provided).

Gate Bracket Mounting Examples

16

rev 07.16.12

Level Opener

Gate In Open Position

LEVEL horizontal cross member

Post Bracket Assembly
bolted to fence post

Clevis Pin, Bushing, and Hairpin Clip

Clevis Pin, Bushing, and Hairpin Clip

Gate Bracket bolted
to gate cross member

Fence Post

Closed Position
Stop Plate

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

Gate Hinge

The gate opens to 110º (max.)

Fence Post

Gate Post

TOP VIEW

SIDE VIEW

MOUNTING THE OPENER

Step 5

Attach the opener to the securely bolted post bracket assembly and gate bracket using clevis pins, bushings,
and hairpin clips, or optional Pin Locks (FM133). Verify that the opener is level and adjust the post bracket
assembly if necessary.

Installation of the Closed Position Stop

The Mighty Mule Gate Opener firmly holds the gate in the closed position using the closed position
stop plate. The closed position stop helps stabilize the gate leaf in the closed position.

Step 6

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.

rev 07.16.12

17

At this stage of the installation, the opener should be installed on

Gate Swings Evenly and Freely
Hung Firmly and Plumb

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.

Moving Gate Can Cause

Injury Or Death

WARNING

!

Horizontal Cross Member

Single Gate Opener

Post Bracket Assembly

Gate Bracket

Closed Position Stop Plate

Bottom
Access Panel

ON

OFF

ON/OFF
Switch

the gate and the closed position stop plate should be in place.

Check List

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

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

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

•Allhardwareistightenedatthistime.

Preparing to Activate the System

In order to have easy access to the control board during the rest of the
installation, remove the opener and remount it upside down.

IMPORTANT:

Return the opener arm to the
upright position when installation is
complete to prevent water damage
to the control board.

18

rev 07.16.12

ON/OFF

ON/OFF

Control Board Access Cover

Control Board

Battery Harness
Connector

Receiver Wires

ON/OFF Switch

ON/OFF

ON/OFF

Battery Harness Connector

10 foot Harness
From Battery

0

2

RED to POSITIVE

BLACK to NEGATIVE

Battery Harness
Connector

0

2

10 Foot
Power Cable

CONNECTING THE BATTERY

Step 1

With the opener mounted in the upside down
position remove the Control Board Access Panel
on the bottom of the opener arm.

Step 2

Place the 12 Volt automotive or marine type battery and
its weatherproof case within 6 feet of the fence post
where the opener arm is mounted.

Step 4

IMPORTANT: Make sure the power switch on the
opener arm is in the OFF position.

Run the plug end of the Wire Harness wire up to
the opener arm and plug it into the battery harness
connector coming from the control board.

Step 3

Attach the 10 foot battery harness wires provided to the
terminals of the battery. Take care to attach the BLACK
wire to the NEGATIVE terminal and the RED wire to
the POSITIVE terminal. Reverse connection will cause
damage to the control board.

rev 07.16.12

19

ON/OFF

– o

Battery Harness Wires

Transformer Wires

Receiver Wires

Accessory Wires

Neatly arrange all
wires to lay flat as
they come out of
the opener.

Mighty Mule 350

Wire Routing

Routing Pin

ON/OFF

ON/OFF

Receiver Wire

Battery Harness Wire

Battery Harness

In-Line 20 Amp Fuse

(included)

Battery Harness

Connectors

0

2

Strain Relief Slot

To avoid stripping screw
holes - tightening screws
by hand with a hand held
screwdriver is recommended.

IMPORTANT: Detailed Wire Routing Diagrams

The battery harness wire has an
in-line 20 Amp fuse that must be
placed inside the opener when
connecting the battery to the
opener. The illustration to the
right shows the best placement
for the battery harness wire, con­nector and in-line fuse.

The wires from the battery harness, receiver, transformer or solar panel,
and any accessories that have been installed must be routed down the
sides of the opener and out the strain relief slot in the back of the opener.

It is IMPORTANT that the wires lay flat and run inside the routing pins at
the back of the opener and out the strain relief slot without being pinched
when the control board access cover is replaced. See the illustrations to
the right and below.

20

rev 07.16.12

(surge protector

not supplied)

Run 1000' (max.) of low
voltage wire to control
board from transformer
(wire not included).

PVC conduit (not included)
to protect wire from lawn
mowers and weed eaters.

CONNECTING THE TRANSFORMER

IMPORTANT: Never connect the transformer and a solar panel to the opener control board at the same time. It
will damage the control board.

IMPORTANT: If you are using SOLAR PANEL(S) to charge the opener battery, skip this section and
go to "Connecting Solar Panel(s)" section on page 23.

IMPORTANT INFORMATION ABOUT LOW VOLTAGE WIRE

The only wire acceptable for use with GTO products is 16 gauge dual conductor, stranded,
direct burial 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 stranded wire, these types of wire are
inadequate for use with your gate opener system.

NEVER SPLICE WIRES. Splicing permits corrosion and seriously degrades the wire's

ability to carry an adequate current.

Step 5

Select the 120 Volt electrical outlet into which you will plug the transformer. Lay the low voltage wire in a trench
following a path from the selected electrical outlet to the opener arm. Wires coming up from the ground should
be run through PVC conduit to protect them from lawn mowers, weed eaters, and grazing animals. Be sure to
bury the wire laid in the trench.

Step 6

Bring enough wire up through
the PVC conduit to allow for
gate movement from open to
closed position. See example
at right.

rev 07.16.12

21

SURGE PROTECTOR

Transformer

Step 7

1

ON

234

15

CHARGING
POWER

STATUS

RF

PULL-PUSH
MODE1
MODE2
LOCK/BEACON

OFF120

MIN MAX

STALL FORCE

CLOSE TIME

SET

LIMIT

LEARN

REMOTE

AUX

OUT

SOLAR

INPUT

18VAC/

RCVR

GRN

BLK

RED

EXIT

SAFETY

EDGE

CYCLE

COMMON

LINK

Low Voltage Wire
from Transformer

H L

Strip 3/16" off the ends of the low
voltage wire and twist tightly. Insert
these ends to the 18 VAC terminal
block located on the control board (see
illustration at right). The wires can be
inserted into either terminal regardless
of color. Be certain not to let the

exposed wires touch each other!

Tighten set screws against exposed end
of wires.

Correct

Wire

Wrong Wrong

Screwed into

wire insulation

Exposed strands

of wire

Step 8

At the AC outlet strip 1/2" of insulation from the ends
of the low voltage wire. Attach these stripped ends to
the transformer terminals.

Make sure the exposed wires do not
touch each other!

Step 9

Plug the transformer into the electrical outlet. Use of a surge
protector with the transformer is strongly recommended. If
electrical outlet is located outdoors, outlet and transformer
should be protected by a weatherproof cover.

22

rev 07.16.12

1

ON

234

15

CHARGING
POWER

RF

PULL-PUSH
MODE1
MODE2
LOCK/BEACON

SET

LIMIT

LEARN

REMOTE

AUX
OUT

SOLAR

INPUT

18VAC/

RCVR

GRN

BLK

RED

EXIT

SAFETY

EDGE

CYCLE

COMMON

LINK

H L

Low Voltage Wire
from Solar Panel

1

ON

234

15

CHARGING
POWER

STATUS

RF

PULL-PUSH
MODE1
MODE2
LOCK/BEACON

OFF 120

MIN MAX

STALL FORCE

CLOSE TIME

SET

LIMIT

LEARN

REMOTE

AUX OUT

SOLAR
PANEL

18VAC

RCVR

GRN

BLK

RED

EXIT

SAFETY

EDGE

CYCLE

COMMON

LINK

1

ON

234

PULL-PUSH
MODE1
MODE2
LOCK/BEACON

RED

RED

BLACK

BLACK

attach BLACK (–) to SOLAR INPUT
attach RED(+) to SOLAR INPUT

Solar Panels connect in PARALLEL

CONNECTING THE SOLAR PANEL(S)

IMPORTANT: Never connect the transformer and a solar panel to the opener control board at the same time. It
will damage the control board.

If you are using the transformer included with the Mighty Mule Gate Opener to charge the opener battery, skip
this section and go to "CONTROL BOARD SETTINGS" below.

3

Strip

/16" off the ends of the low voltage wire from the solar

panel and twist tightly. Insert these ends to the 18 VAC
terminal block located on the control board (see illustration
at right). The wires can be inserted into either terminal
regardless of color. Be certain not to let the exposed

wires touch each other!

Tighten set screws against exposed end of wires.

NOTE: For multiple panels wire the panels in parallel as
shown in this diagram.

CONTROL BOARD SETTINGS

Control Board Settings

DIP Switches

DIP Switch #1 - Push/Pull-to-Open

If your gate opens into the property (Pull-to-Open)

the DIP Switch is set to OFF (factory). If your gate
opens out from the property (Push-to-Open) the
DIP Switch must be set to the ON position.

NOTE: if you have a Push-to-Open gate

application you will need a Push-to-Open Gate
Bracket [FM148](see Push-to-Open Instructions
on page 31).

DIP Switch #4 - Lock/Beacon

This DIP selects the mode of operation of the "AUX

OUT" terminal.

The OFF (factory setting) position is selected if you are using an Automatic Gate Lock with your

Mighty Mule Opener.

(Refer to page 28 steps 6 &7 AUX/OUT Accessory Connection)

rev 07.16.12

23

MOUNTING THE RECEIVER

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

Consider the following when mounting the receiver:

•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!

Receiver mounted
on piece of wood

•DONOTruncableinconduitcontainingacwiring.

•Thereceiverrangecanvaryfrom50to100feetdepending

upon weather, topography, and external interference.

NOTE: Do not mount upside down.

24

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 any interference that may cause undesired operation.

Working 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.

rev 07.16.12

ON/OFF

ON/OFF

1

ON

234

STATUS

PULL-PUSH
MODE1

OFF 120

MIN MAX

STALL FORCE

CLOSE TIME

SET

LIMIT

LEARN

REMOTE

SETTING THE CLOSED POSITION LIMIT

Setting the Closed Position Limit

For PULL-TO-OPEN Installation

Turn the power switch on
to the ON position

Step 1

Power switch is on, gate
is in the OPEN position,
opener arm fully
retracted.

Step 3

When the gate reaches
the desired CLOSED
position, press
the transmitter
to stop the gate.

Step 5

Press the transmitter
again to allow the gate to
return to the fully
OPEN position.

Gate in

OPEN

Postion

Gate

Closed

Gate in

OPEN

Position

Step 2

Press the transmitter to

Gate

Closing

activate opener arm.
The gate will begin
to CLOSE.

Step 4

With the gate at
the correct position,
program the closed limit
setting by pressing and
holding SET LIMIT

seconds.

The gate closed position is now programmed.
If you set the limit at the wrong position: press your
transmitter to return the gate to the fully opened
position, then press and hold the SET LIMIT button
for 5 seconds. This will clear the memory for the
closed limit position. Repeat Steps 1-5.

for 5

rev 07.16.12

25

1

ON

234

CHARGING
POWER

STATUS

RF

PULL-PUSH
MODE1
MODE2
LOCK/BEACON

OFF 120

MIN MAX

STALL FORCE

CLOSE TIME

SET

LIMIT

LEARN

REMOTE

SOLAR
PANEL

18VAC

RECR

GRN

BLK

RED

EXIT

SAFETY

EDGE

CYCLE

COMMON

LINK

MINMAX

STALL FORCE

Stall Force Potentiometer Setting

1

ON

234

CHARGING
POWER

STATUS

RF

PULL-PUSH
MODE1
MODE2
LOCK/BEACON

OFF120

MIN MAX

STALL FORCE

CLOSE TIME

SET

LIMIT

LEARN

REMOTE

SOLAR
PANEL

18VAC

RECR

GRN

BLK

RED

EXIT

SAFETY

EDGE

CYCLE

COMMON

LINK

OFF 120

CLOSE TIME

IMPORTANT: For safety reasons the obstruction setting or
Stall Force on the Mighty Mule Gate Opener control board

comes from the factory set at MIN (minimum). In many gate
installations this setting will need to be adjusted to overcome
the weight and size of the gates.

The Stall Force potentiometer on the control board operates
like a volume control on a radio. It controls the amount
of force the opener will apply to an obstruction before it
automatically stops and reverses direction for approximately
two (2) seconds.

Use a small flathead screwdriver to turn the arrow in
the center of the potentiometer. Adjust the control from
the MINIMUM position where the gate operates without
obstructing from its own weight or the wind conditions in
your area.

NOTE: You may need to increase the
stall force in cold weather due to increased
resistance from gate hinges.

ALWAYS KEEP SAFETY IN MIND WHEN ADJUSTING OR

SERVICING YOUR AUTOMATIC GATE OPENER!

Set Auto-Close Time

The Auto-Close determines how long the gate will remain open
before it automatically closes. The factory setting is OFF. Use a
small flat blade screwdriver, you can adjust the settings to OFF,
or from 3 to 120 seconds.
NOTE: Auto-Close timer is disabled (gate will not automatically
close) if gate is not at the fully open position.

26

rev 07.16.12

1

ON

234

STATUS

PULL-PUSH
MODE1
MODE2

OFF120

MIN MAX

STALL FORCE

CLOSE TIME

SET

LIMIT

LEARN

REMOTE

LEARN REMOTE
Button

Personalize Your Transmitter Setting

+

0

ECE

1 2 3 4 5 6 7 8 9

1 2 3 4 5 6 7 8 9

ECE

A23S 12V

ALKALINE BATTERY

+

0

–

LED

All transmitters have a standard setting and are ready to operate your
Mighty Mule Gate Opener. For your safety and security, we strongly
recommend that you replace the factory setting with your own personal
setting.

NOTE: If you have multiple transmitters, you should adjust all of
them at this time.

Step 1

Use a small Phillips head screw driver to remove the transmitter cover.

Step 2.

Set the transmitter DIP switches using a small screwdriver. 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
reset, replace and close the access cover.

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

Step 3.

Program the new setting in the control board memory.

A. Press and hold the transmitter button while sliding the ON/

OFF switch to the ON position.

B. Press and hold the LEARN Transmitter button until the

alarm sounds (3-5 seconds).

C. Release the Transmitter button. The new transmitter setting

is now programmed.

D. Verify that the transmitter operates the gate.

FCC WARNING: Changes or modications to this unit not expressly approved by the party responsible for compliance could void the user’s
authority to operate the equipment. In accordance with FCC Part 15, Section 15.21, the manufacturer is not responsible for any radio or TV
interference caused by unauthorized modications to this equipment. Such modications could VOID the user authority to operate the equipment.

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to
radio communications. The GTO AQ201-NB receiver was used during FCC testing. Substitutes should not be used.

However, there is no guarantee that interference will not occur in particular installations. If this equipment does cause harmful interference to radio
or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference
by one or more of the following measures: • Increase the separation between the equipment and the receiver. • Connect the equipment into an
outlet on a circuit different from that which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help.

rev 07.16.12

27

CONNECTING ACCESSORIES

Input Connections

 •Allcontrolinputsaredry-contact,normallyopen,inputs.DONOTapplyexternalvoltagesources

to these inputs.

 •AllinputsareconnectedwithrespecttoCOMMONterminal.
 •ThestatusLEDwillblinkoncewhenanyinputisactivated.

1 COMMON: Circuit common (reference

for all logic input)

2 CYCLE: (Typically for use with push

button or hard-wired keypad)

 •Eachactivationatthisinputwillcycle

the operation as follows:

OPEN–STOP–CLOSE–STOP–OPEN

3 EDGE: (Typically for use with safety

edge device)

 •Activationofthisinputwhilethe

gate is closing will cause the gate
to stop and reverse direction for
approximately 2 seconds.

 •Activationofthisinputwhilethegate

is opening has no effect (gate will
continue to open).

 •Activationofthisinputwhilegateis

idle will prevent gate from closing.

4 SAFETY: (Typically for use with photo

beam device, loop detector or other
non-contact sensors)

 •Activationofthisinputwhilethegate

is closing will cause the gate to stop
and return to the opened position.

 •Activationofthisinputwhilethegate

is opening has no effect (gate will
continue to open).

 •Activationofthisinputwhilegateis

idle will prevent gate from closing.

7

6

5

4

3

2

1

H L

OUT

AUX

18VAC/

SOLAR

INPUT

EXIT

SAFETY

EDGE

CYCLE

COMMON

GRN

RCVR

BLK

RED

LINK

CHARGING

POWER

28

5 EXIT: (Typically for use with exit loop or wand)

 •Activationofthisinputwillopenthegateifit’snotalreadyattheopenposition
 •Activationofthisinputwhileatopenlimitwillrestarttheautoclosetime(ifenabled).

6/7 AUX/OUT: Multi-function output: refer to DIP Switch 4 on page 23.

rev 07.16.12

WIRING ACCESSORIES

CHARGING
POWER

LINK

H L

AUX

OUT

7

DIP switch 4 set to

OFF position (Default)

RED

Automatic Gate Lock

(FM143)

Push Button Control

6

BLACK

18VAC/

SOLAR

INPUT

5

EXIT

SAFETY

4

EDGE

23

CYCLE

1

COMMON

GRN

RCVR

BLK

RED

3

1

Edge Sensor

1

2

4

1

(+12 v)

( – )

Photo Beams

2

3

1

ABC

DEF

5

6

4

JKL

MNO

GHI

8

9

7

TUV

WXY

PRS

0

1

2

Keypad

(FM137)

(See additional wiring digram on pg. 30)

NOTE:

rev 07.16.12

29

Connections are for typical applications.
For additional connection options not illustrated here
refer to the accessory manual for details.

(R4222)

5

1

(+12 v)

( – )

Vehicle Sensor (FM138)

1

ON

2 3 4

15

CHARGING
POWER

STATUS

RF

PULL-PUSH
MODE1
MODE2
LOCK/BEACON

OFF120

MIN MAX

STALL FORCE

CLOSE TIME

SET

LIMIT

LEARN

REMOTE

RECR

GRN

BLK

RED

EXIT

SAFETY

EDGE

CYCLE

COMMON

LINK

Wiring the Gate Opening
Driveway Sensor to the
Mighty Mule 350

Wire from Gate Opening Sensor

Twisted SHIELD

BLACK

RED to BLUE

YELLOW

Wire Nut

to EXIT

Together to
COMMON

AUX OUT (H)

AUX
OUT

SOLAR

INPUT

18VAC/

H L

Mighty Mule Gate Opening Sensor (FM138)

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

Make sure the power
switch to the opener
is turned OFF
before connecting
sensor wiring to the
Mighty Mule 350
terminal blocks.

The wiring cable that
comes with the Mighty
Mule Gate Opening
Sensor has four colored
wires and a braided
wire shield around
them.

Stripback a few inches
of the vinyl (black)
outter cover to expose
the braided SHIELD.
Cut the SHIELD down one side and twist as shown in illustration. Connect the twisted SHIELD, the
YELLOW, the BLACK as well as a separate length of wire, with a WIRE NUT. The other end of the single
length of wire is connected to the COMMON terminal on the Mighty Mule 350 control board.

Connect the RED wire from the sensor to the AUX OUT (H) terminal, and the BLUE wire to the EXIT
terminal on the Mighty Mule 350 control board.

FINAL STEPS

When everything has been connected to the opener...

Replace the control board access
cover. Remove the opener arm from
both mounts and remount it in the
upright position (control board cover
facing down). Failure to re-mount
opener in the upright position will
allow water to enter the opener and
cause damage to the opener control
board.

•AttachWarningSigns

•TrimallBolts

•RegisterYourWarranty

30

rev 07.16.12

3/8" x 2" Bolt

3/8" Nut

FM148

(required, not included)

Post Bracket

Post Bracket

3/8" Lock Washer

Post Bracket Assembly

3/8" Washer

PUSH-TO-OPEN INSTALLATION INSTRUCTIONS

Level Opener

Fence Post

Gate In Closed Position

LEVEL horizontal cross member

Post Bracket Assembly

Gate Bracket

Clevis Pin

Hairpin Clip

Post Bracket Assembly

Bushing

Rear Mount

Opener

Clevis Pin

Hairpin Clip

Bushing

Gate Bracket

Front Mount

PUSH-TO-OPEN gates open out from the property (opener arms extend
to open). A Push-To-Open Bracket is required for this type of installation. In
a Push-To-Open installation, the opener is installed while the gate is in the
closed position and the opener fully retracted.

Swinging gates MUST NEVER open into public access areas!

Step 1

Insert the 3/8" x 2" bolt through the center hole of the post brackets and
post pivot bracket as shown. Fasten a 3/8" lock washer, 3/8" washer and

3

/8" nut on the end of the bolt. DO NOT overtighten the nut because the

post pivot bracket will have to be adjusted later.

Step 2

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

Step 3

With the gate in the closed position (up to 110º from its open position), and the opener fully retracted, 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.

rev 07.16.12

31

IMPORTANT: While determining the mounting point for the post pivot bracket assembly, be sure that the position

19 MAX

allows for minimum 2 inches of clearance between the gate and the opener in both the open and closed positions,
as shown in the diagrams below. This clearance will give the opener the most efficient leverage point for opening
and closing the gate and more importantly provides the least possible pinch area.

Step 4

When you feel that you have the best position for the post pivot bracket in the closed position, insert the 5/16" bolt
through the aligned holes of the post bracket and post pivot bracket to hold it in place. Remove the clevis pin from
the front mount and while supporting the gate opener, swing the gate and gate opener to the open position. With
the gate and gate opener in the open position check the clearance and be sure that the gate opener is not binding
at the post pivot bracket.

If you don't have 2 inches of clearance or the gate opener is binding on the post pivot bracket, remove the 5/16"
bolt and readjust the pivot bracket until you can achieve these important clearances.

With the post pivot bracket in the optimum position for clearance and freedom of movement, reattach the opener
to the gate bracket in the open position and recheck the gate opener level and make sure the brackets are
clamped securely.

32

rev 07.16.12

1

ON

234

15

CHARGING
POWER

STATUS

RF

PULL-PUSH
MODE1
MODE2
LOCK/BEACON

OFF 120

MIN MAX

STALL FORCE

CLOSE TIME

SET

LIMIT

LEARN

REMOTE

AUX OUT

SOLAR
PANEL

18VAC

RCVR

GRN

BLK

RED

EXIT

SAFETY

EDGE

CYCLE

COMMON

LINK

1

ON

234

PULL-PUSH
MODE1
MODE2
LOCK/BEACON

Set Control Board for Push-To-Open

1

ON

234

STATUS

PULL-PUSH
MODE1

OFF 120

MIN MAX

STALL FORCE

CLOSE TIME

SET

LIMIT

LEARN

REMOTE

ON/OFF

Make sure the control box power switch is OFF. Use a small
screwdriver to move the Number 1 DIP switch from the
factory setting (OFF / Pull-To-Open) to ON for Push-To-Open.
Turn power switch ON. The control board is now configured
to push the gate open.

Setting the Open Position Limit (Push-To-Open Installations)

Step 1

Power switch is on,
gate is in the CLOSED
position, opener arm fully
retracted.

Step 3

When the gate reaches
the desired OPEN
position, press the
transmitter to
stop the gate.

Step 5

Press the transmitter
again to allow the gate
to return to the fully
CLOSED position.

Gate is now
programmed

Gate in Closed

Position

Gate

Opened

Gate in Closed

Position

Gate open position

is now programmed

Step 2

Press the transmitter to

Gate

Opening

activate opener arm. The
gate will begin to OPEN.

Step 4

With the gate at the
correct position,
program the open limit
setting by pressing and
holding SET LIMIT for 5
seconds.

The gate open position is now programmed.
If you set the limit at the wrong position: press
your transmitter to return the gate to the fully
closed position, then press and hold the SET LIMIT
button for 5 seconds. This will clear the memory
for the open limit position. Repeat Steps 1-5.

rev 07.16.12

33

MAINTENANCE AND 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 lbs. or more, routinely grease the ball bearing hinges at least 4 times a year;

more frequently if the gates are in a coastal area.

• Apply silicone spray to a soft, dry cloth and clean the push/pull tube at least once a month.

AUDIBLE/BUZZER/ALARM FEEDBACK:

1. 1 beep with 2 seconds off:

 Limitswitcherror:Limitswitch’snormallyopenandnormallyclosedinputsbothopenorboth 

shorted. The alarm will automatically shut off in 4 seconds after the problem is corrected.

2. 5 beeps with 2 seconds off:

Low battery condition detected: Low battery can occur if the following condition is detected:

While in idle state and the battery voltage is below ~11.5 Volts.
While running and the battery voltage is below ~10.0 Volts.
The alarm will automatically shut off when the idle voltage is more than 12 Volt.
The unit may continue to operate even when low battery is detected.
The STATUS LED will also blink when the buzzer is beeping.

3. 1 beep when attempting to run the unit:

No battery is connected.
Blown fuse.
Dead cell or extremely low battery condition.

4. Alarm continuously beeps (Transmitter does not operate unit AND not at either limit):

Two consecutive obstructions have been detected without reaching the limit. Alarm will

automaticallyshutoffafter5minutes.‘Power-cycle’theunitwillalsoshutoffthealarm.

5. Learn Transmitter:

 Whenanewcodeislearnedfromthetransmitterthealarmwillsound.Releasethe‘LEARNTransmitter’

button will turn the alarm off. See "Setting Your Personal Transmitter Code" section on page 27.

6. Power-Cycle:

The alarm will beep for 1 second upon power up.

VISUAL/LEDS FEEDBACK:

1. RF LED (LED2):

Blinking when there is 318 MHz signal is received. This LED is typically off when the receiver is

connected and no 318 MHz signal is presented.

2. STATUS LED (LED1):

While the unit is IDLE:

1 blink with 2 seconds off:
Free Exit terminal is shorted to common.
2 blinks with 2 seconds off:
Safety terminal is shorted to common.
3 blinks with 2 seconds off:
Edge terminal is shorted to common.
4 blinks with 2 seconds off:
Cycle terminal is shorted to common.

34

rev 07.16.12

LEARN LIMIT Mode:
ThisLEDwillturnonwhenthe‘LEARN-LIMIT’buttonispressed.Itwillturnoffafter3seconds

indicating that it has entered the learn limit mode (if not at the retracted limit) or cleared the previous
learned limit (if at retracted limit). See "Setting Closed Position" section on page 26.

Whenever there is a change in state at any of the inputs this LED will blink once.

3. POWER LED (Green):

ON: AC power or solar power is presented.
OFF: NO AC power or solar power is presented.

4. CHARGING LED (Red):
Red light on or flashing – the unit is charging

Red light off – the unit is not charging. Check transformer or solar panel.

THE GATE CLOSES THEN OPENS PARTIALLY:

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

2. Check the gate for binding or hinge damage.

3. Increase Stall Force setting.

THE GATE OPENS THEN CLOSES PARTIALLY:

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

2. Check the gate for binding or hinge damage.

3. Increase Stall Force setting.

VOLTAGE READINGS

18 Vac Transformer _________________________ 18.0 to 22.0 Vac

5 W Solar panel (single) _____________________18.0 to 22.0 Vdc
measure voltage at panel and control box.

12 V Battery ________________________________ 12.0 to 13.5 Vdc

Charging circuit ____________________________ 12.0 to 14.8 Vdc

measure voltage with battery connected

rev 07.16.12

35

WARRANTY REPAIRS

If your Mighty Mule Gate Opener is not operating properly, please follow the steps below:

1. First use the procedures found in the Visual and Audible Diagnostic Indicators section (page 34).

2. If you are unable to solve the problem, call the GTO Service Department at [phone], or [phone].
Refer to the serial number (located under rear mount on arm) 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. Once you have received your RGA# send in your original equipment for repair. Please refer to Manufacturers’
Limited Warranty for complete details. Securely pack the component(s) authorized for return to the factory.
Include a copy of your sales receipt for the purchase of the product(s). 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, 3121 Hartseld 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.

After the twelve (12) month warranty expires, GTO, or one of its authorized service
centers will perform necessary repairs for a nominal fee. Call GTO's Technical
Service Department for more information.

GTO Technical Service and Installation Assistance

8:00am–7:00pm • Monday–Friday (EST)

Toll Free Support: 800-543-1236 • Local Support 1-850-575-4144 • Fax: [phone]

24/7 Troubleshooting Wizard: http://support.gtoinc.com

Gates That Open, LLC

3121 Hartsfield Road, Tallahassee, Florida, USA 32303

www.mightymule.com

36

rev 07.16.12

Pivot Bracket

Column

Pivot Bracket

Gate

A

B

Column Mount Example
(A + B must be between 7 and 19 inches)

Hinge

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

A. The simplest solution is to install the opener in a push-to-open configuration. The minimum

clearance 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!

rev 07.16.12

37

®

ACCESSORIES

AUTOMATIC
GATE LOCK

®

ELECTRONIC SECURITY LOCK

1

2

ABC

3

DEF

4

GHI

5

JKL

6

MNO

7

PRS

8

TUV

9

WXY

0

Accessories are Available From Your Retail Store

Solar Panel Kits [FM121/FM123]

If your gate operator is more than 1000 ft. away from an AC power outlet, you can choose to
maintain the battery charge with the GTO Solar Panel Kit.

 • 10WattSolarPanelChargingKit[FM123]

 • 5WattSolarPanelChargingKit[FM121]

Push Button Control [FM132]

Unlit doorbell button for remote entry or exit control. Wires directly to the control board and uses 16
gauge stranded, dual conductor low voltage wire (sold separately).

Pin Lock [FM133]

Use as a substitute for the clevis pin at the front mount of the FM350 to prevent theft of the operator.

Key Chain Two Button Transmitter [FM134]

The Key Chain Transmitter is a dual button version of the Mighty Mule® single button entry
transmitter and has the same adjustable code settings. Used for 2 gates or 1 gate and garage door.
(battery is included)

Single Button Transmitter [FM135]

The Mighty Mule® entry transmitter, with adjustable code settings, is standard equipment with all
Mighty Mule® systems. (battery is included)

Digital Keypad [FM137]

Allow friends access to your property using an identification code that you provide. Program up to
25 entry codes for added security. Powered by three “AA” batteries (not included).

Mounting Post [FM100] - In Ground

Designed to mount digital keypads, wireless intercom systems, and other access control devices for
your gate automation system.

Mighty Mule® Vehicle Sensor [FM138]

Automatically activates gate operator “Hands-Free” when a vehicle exits the property.
Electromagnetic sensor detects vehicles in motion.

Automatic Gate Lock Pull-to-Open [FM143]

The #1 Accessory For Swing Gate Operators! Designed for added security in conjunction with
Mighty Mule Automatic Gate Operators. The gate lock unlocks and locks automatically when the
gate opens and closes. The perfect solution for high wind conditions.

Photo Beams [R4222]

Primary “through beam” photo beam device. Provides “non-contact” entrapment protection.

38

rev 07.16.12

Accessories are Available From Your Retail Store (con't)

POWER

Keypad

Batt Low

Grant
Permission

Answer

DV 9V

ACCESS CONTROL SYSTEMS

1-800-543-4283

Wireless Entry Intercom / Keypad [FM136]

Allows owner to screen guest at the gate before allowing access to the property. Keypad also allows
owner to give up to 25 programmable entry codes to family, friends or approved delivery personnel.
Codes can be permanent or temporary. Can be wireless up to 500 feet.
Additional base stations available (F3101MBC).

Driveway Alarm [FM231]

This device alerts you of vehicles entering your driveway (with or without an automated gate). The
indoor base station signals you with a door chime when a vehicle passes the driveway sensor.

Wireless Driveway Vehicle Sensor [FM130]

Automatically activates gate operator “Hands-Free” when a vehicle exits the property. 100 ft. range
between transmitter and receiver. Easy installation.

Low Voltage Wire [RB509]

The 16 gauge, stranded, dual conductor low voltage Wire is for connecting the AC powered

transformer,solarpanelorwiredaccessoriestothesystem’scontrolboard.Thisspeciallydesigned

wire is UV resistant, PVC coated, and ready for direct burial.

Replacement Transformer [RB570]

Standard 18 volt, 2200 mA AC transformer included with the FM350 to maintain battery charge.

Garage Door Receiver [RB709U-NB]

The Garage Door Receiver allows you to use the same Mighty Mule® entry transmitter to operate your
gate operator and your garage door operator. Compatible with most garage door operators.

Push to Open Bracket [FM148]

Required when the FM350 must push a gate open (arm extends to open), such as away from a sloping
driveway or where space prevents gate from opening into the property (pull to open).

If you have a question about any special order item,

just call 1-800-543-GATE!

The contents of all material available on this installation manual are copyrighted by Gates That Open, LLC. (“GTO”), unless otherwise indicated. All rights are reserved by GTO, and content may not be

reproduced, downloaded, disseminated, published, or transferred in any form or by any means, except with the prior, written permission of GTO. Any reprinting of GTO publications is by permission only.

Mighty Mule¨, E-Z Gate¨, GTO¨, are registered trademarks of GTO, America’s DIY Automatic Gate Openers is a trademark of GTO and are the exclusive property of GTO.

rev 07.16.12

39

All rights are reserved by GTO, and these marks may not be used, in any for without the prior, written permission of GTO.

Copyright infringement is a violation of federal law.

®