Mighty Mule MM260 Installation Manual

120 Volt indoor
Transformer

(surge protector

not supplied)

Control Box

MM260

Installation Manual

Gate Swings Evenly and Freely
Hung Firmly and Plumb

Warning Sign

Single Gate Opener

Post Bracket

Gate Bracket

Power Cable

Horizontal Support

Closed Position Stop Plate

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

This product meets the requirements of UL325 6th Edition, 2016, the standard for gate
operator safety.

Mighty Mule® is the retail brand of GTO Access Systems, LLC

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

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

Example of nished installation

(installations vary slightly on different types of gates)

3121 Hartseld Road • Tallahassee, FL 32303

Fence Post Set in Concrete

ACCESS SYSTEMS, LLC

Printed in China for GTO Access Systems, LLC.

Copyright© 2016 GTO Access Systems, LLC

Document Number: R26008 REV A (12-15.16)

WARNING

This equipment meets 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 Access Systems, LLC, shall in no event

be liable for direct, indirect, incidental, special or consequential damages or loss of prots 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
Access Systems, 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 operator. This gate operator produces a high level of force. Stay clear of the unit
while it is operating and exercise caution at all times.

ALL AUTOMATIC GATE OPERATORS ARE INTENDED FOR USE ON VEHICULAR GATES ONLY.

Product Usage

The Mighty Mule Gate Operator meets all of the safety requirements of a Class I Residential Vehicular Gate Operator and is
intended for use solely with vehicular swing gates in single-family residential applications that meet the Class I category listed
in the table below.

Vehicular Gate Operator Class Categories

Residential Vehicular Gate Operator-Class I:

A vehicular gate operator (or system) intended for
use in garages or parking areas associated with a
residence of one-to-four single families.

Commercial/General Access Vehicular Gate
Operator-Class II: A vehicular gate operator (or

system) intended for use in a commercial location

or building such as a multi-family housing unit (ve

or more single family units), hotel, garages, retail
store, or other buildings accessible by or servicing
the general public.

Industrial/Limited Access Vehicular Gate
Operator–Class III: A vehicular gate operator (or

system) intended for use in an industrial location or
building such as a factory or loading dock area or
other locations not accessible by or intended to service
the general public.

Restricted Access Vehicular Gate Operator–
Class IV: A vehicular gate operator (or system)

intended for use in an industrial location or building
such as a factory or loading dock area or other
locations not accessible by or intended to service the
general public.

Table of Contents

PLEASE READ THIS FIRST ...................................................................................................................... ii

IMPORTANT SAFETY INFORMATION ................................................................................................. iii

TECHNICAL SPECIFICATIONS .............................................................................................................. x

BEFORE YOU BEGIN .............................................................................................................. xi

Powering Options .................................................................................................................... xi

Check Existing Gate Size and Material ......................................................................................... xii

Check for Proper Gate Installation ............................................................................................... xii

Gate Grounding ......................................................................................................................................... xii

Items Included ....................................................................................................................... xiii

Tools Needed ........................................................................................................................ xiv

Items Not Included ................................................................................................................. xiv

GATE OPENER INSTALLATION ............................................................................................... 1

CLOSED POSITION STOP PLATE INSTALLATION ................................................................. 3

CONTROL BOX AND BATTERY INSTALLATION .................................................................... 4

TRANSFORMER WIRING INSTALLATION ............................................................................. 5

SOLAR PANEL INSTALLATION .............................................................................................. 6

SETTING PERSONAL TRANSMITTER CODE ........................................................................ 7

SETTING CLOSED LIMIT POSITION ..................................................................................... 8

SETTING DUAL SENSE DETECTION AND AUTO CLOSE TIME ........................................... 9

CONNECTING ADDITIONAL DEVICES ................................................................................ 10

CONTROL BOARD CONNECTIONS .................................................................................... 11

CONNECTING ACCESSORIES ............................................................................................ 12

MAINTENANCE .................................................................................................................... 13

TROUBLESHOOTING GUIDE ............................................................................................... 13

REPAIR SERVICE .................................................................................................................. 15

CONVERSION CHART .......................................................................................................... 16

ACCESSORIES ..................................................................................................................... 17

Please Read This First!

Thank you for purchasing a Mighty Mule Gate
Operator—GTO's "do-it-yourself" automatic gate
operator! When correctly installed and properly used,
your Mighty Mule Gate Operator 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 DVD will
enable you to properly install your Mighty Mule Gate
Operator.

The Mighty Mule Gate Operator is designed for
installation on a pull-to-open single leaf gate (gates
that open into the property). The gate must not exceed
12 feet in length or weigh more than 300 pounds

(please see Technical Specications on page x). The

Mighty Mule Gate Operator 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 operator will obstruct
and stop.

The Mighty Mule Gate Operator accommodates
extra transmitters, digital keypads, solar panels,
push buttons, automatic gate locks, and other access
control products. These optional accessories (see the
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 Mighty Mule Sales
Department (800-543-4283).

The Mighty Mule Gate Operator features Dual Sense
Technology™. This feature makes the gate stop and
reverse direction when it comes in contact with an

obstruction. This is factory set to the most sensitive
setting and must be adjusted during installation.

The Mighty Mule Gate Operator also has an adjustable
auto-close feature. After the gate reaches the fully
open position, it can be set to remain open up 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.

NOTE—If your application requires any of the
following:

• Swing gates longer than 12 feet or weighing
more than 300 pounds

• Slide gates

• Heavy duty or commercial uses

• Professional installation

Go to www.gtoaccess.com for a dealer or retailer near
you or call [phone] for information about our
Linear PRO Access professional line of gate operators
and accessories. Our Sales Department will be glad to
give you the name and phone number of a Linear PRO
Access dealer near you

.

BEFORE YOU BEGIN TO INSTALL YOUR AUTOMATIC GATE OPERATOR:

watch the enclosed video and 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 operator safety and proper use of the gate operator.

ii MM260 Installation Instructions

Important Safety Information

Because automatic gate operators produce high levels
of force, consumers need to know the potential hazards
associated with improperly designed, installed, and
maintained automated gate operator systems. Keep in

mind that the gate operator is just one component
of the total gate operating system. Each component

must work in unison to provide the end user with
convenience, security, and safety.

This manual contains various safety precautions and
warnings for the installer end user. Because there
are many possible applications of the gate operator,
the safety precautions and warnings contained in

Because Mighty Mule automatic gate operators are only part of the total gate operating system, it is the
responsibility of the installer and end user to ensure that the total system is safe for its intended use.

this manual cannot be completely exhaustive in
nature. It does, 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.

Warnings in this manual are identied with
this warning symbol. The symbol identies

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

Manually Opening and Closing Gate

CAUTION

The gate will move freely and uncontrolled when the gate operator is removed from the gate. ONLY discon­nect the operator when the control box power switch is OFF and the gate is NOT moving.

Disconnecting the Operator

1. Turn control box power switch OFF.

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

3. Remove the operator from the mount.

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

NOTE: Substitute a Pin Lock for the clevis pin on the front mount of the
gate operator to prevent theft of the operator from the gate (see accessory
pages in back of this book).

Front Mount

Clevis Pin

Gate Bracket

Bushing

Hairpin Clip

MM260 Installation Instructions iii

Important Safety Information

For the Installer and End User

WARNING

To reduce the risk of injury or death:

1. READ AND FOLLOW ALL INSTRUCTIONS.

2. Never let children operate or play with gate controls. Keep the remote
control away from children.

3. Always keep people and objects away from the gate. NO ONE

SHOULD CROSS THE PATH OF THE MOVING GATE.

4. Test the gate operator monthly. The gate MUST reverse on contact with
a rigid object or stop when an object activates the non-contact sensors.
After adjusting the force or the limit of travel, retest the gate operator.
Failure to adjust and retest the gate operator properly can increase the
risk of injury or death.

5. Use the manual/emergency release only when the gate is not moving.

6. KEEP GATES PROPERLY MAINTAINED. Read the

user’s manual. Have a qualied service person make repairs to

gate hardware.

7. The entrance is for vehicles only. Pedestrians must use sepa­rate entrance.

8. 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.

9. SAVE THESE INSTRUCTIONS.

I. Before Installation

1. Verify this operator is proper for the type and size of gate,
frequency of use and class of the gate system.

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 entrapment protection devices used with
the system (see page xii).

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

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

ZONE 1

5. This gate operator is intended for vehicular gates only. A
separate entrance or gate must be installed for pedestrian use
(see page viii).

6. Always keep people and objects away from the gate and its
area of travel. No one should cross the path of a moving gate.

7. Identify all of the entrapment zones for the type of installa­tion. An entrapment zone is an area around the automatic gate
system where a person or object could be caught that increase
the risk of injury. Entrapment zones must be eliminated,
guarded or protected.

8. When designing a system that will be entered from a highway
or main thoroughfare, make sure the gate system is placed far

enough from the road to prevent trafc congestion.

ZONE 2

ZONE 5

ZONE 3

Entrapment
Zones for a
Pull-To-Open
Application

iv MM260 Installation Instructions

Driveway

ZONE 4

Gate in the
Open Position

10'

Important Safety Information

For the Installer and End User

Typical Entrapment Zones are shown in the diagrams on page iv:

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 operator and gate.

II. During Installation

4. If push buttons or key switches are installed, they

1. Install the gate operator on the inside of the prop­erty and fence line. DO NOT install an operator
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 (sensing
edges) and non contact sensors (photo beams)
provide additional protection against vehicular
damage.

should be within sight of the gate, 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 operator.

5. Do not activate your gate operator 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 operator
controls in order to prohibit unauthorized use of
the gate.

Pull-To-Open
Application

10'

NEVER install

any control device

within gray area

10'

10'

Moving Gate

Area

Driveway

MM260 Installation Instructions v

Important Safety Information

For the Installer and End User

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

2. The gate is automatic and could move at any
time, posing 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 control away from

children and unauthorized users; store controls
where children and unauthorized users do not
have access to them.

6. KEEP GATE SYSTEMS MAINTAINED.
Always turn power to operator OFF before
performing any maintenance. See page 28 for
maintenance procedures.

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

8. Disconnect the operator 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 INFORMATION
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 operator are aware
of the dangers associated with automated gate
systems. In the event you sell the property
with the gate operator or sell the gate operator,
provide a copy of these safety instructions to
the new owner.

Should you need a replacement manual, a copy
can be obtained by downloading one from the
Mighty Mule web site (www.mightymule.com),

by contacting GTO, at 3121 Hartseld Road,

Tallahassee, Florida 32303 or by calling 1-800­543-4283 and requesting a duplicate copy.

vi MM260 Installation Instructions

Leading Edge

Important Safety Information

For the Installer and End User

Mighty Mule gate operators utilize Dual Sense Tech-

™ entrapment protection. Dual Sense Technol-

nology

™ is built into every Mighty Mule and provides

ogy
redundant methods of entrapment protection for open
and close gate directions.

In addition to Dual Sense Technology, every Mighty
Mule gate controller has provisions for the connection
of additional obstruction detection devices such as
sensing edges and photo beams.

These devices may be located where there is an
increased risk of obstruction. Refer to the diagram
below.

Vehicular Gate

One or more edge sensors may be located at the lead­ing edge, bottom edge, and post edge, both inside and
outside of a vehicular swing gate system.

Wiring to sensors must be located and arranged so the
wiring between the sensor and the gate operator is not
subjected to mechanical damage.

A wireless sensor such as one that
transmits radio frequency (RF) signals to the gate
blocked for obstruction protection functions shall be
located where the transmission of the signals is not
obstructed or impeded by building
structures, natural landscaping or similar
objects.

of the gate

Photo Beams

(recommended, not included)

Entrapment and Obstruction Protection

Mighty Mules’s Dual Sense Technology™ provides entrapment protection, even when properly adjusted. Since all instal­lations are different, you may need to add photo beams or sensing edges to help prevent damage to vehicle or other items
that could be hit by a moving gate.

Entrapment Alarm

The Mighty Mule Automatic Gate Operator is designed to stop and reverse the gate when the gate comes in contact with
an obstruction. Additionally, these operators 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 operator 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.

Sensing Edges

(recommended, not included)

Photo Beams

(recommended, not included)

MM260 Installation Instructions vii

Warning Sign

Pedestrian Gate

Pedestrian Gate Lock

Vehicular Gate

(recommended, not included)

7 foot

minimum

Important Safety Information

Installing Warning Signs and Pedestrian Gates

Warning signs alert people of automatic gate operation and are required when installing Mighty Mule Automatic
Gate Operators. A minimum of two WARNING SIGNS must be installed in the area of the gate. Each sign is to be
visible by persons located on the side of the gate on which the placard is installed.

The operator is intended for installation only on gates used for vehicles. Pedestrians must be supplied with a sepa­rate access opening. The pedestrian access opening shall be designed to promote pedestrian usage. Locate the gate
such that persons will not come in contact with the vehicular gate during the entire path of travel of the vehicular
gate.

We recommend using the GTO Bulldog Pedestrian Gate Lock (Call the GTO Sales Department at 800-543-4283)
for controlled access.

Warning Signs

The gate operator is provided with 2 safety warning signs.
The signs MUST be installed on the front and back of the
gate where they will be visible in the area of the gate.

Permanently secure each warning sign to the gate.

Immediately replace a damaged or missing warning sign.

viii MM260 Installation Instructions

!

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

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

Control box label (1) installed on front of control box

260

®

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.

Maximum Gate: 300 lbs. (136.1 kg); 12 ft. (3.7 m) • Voltage: 12 Vdc;

Frequency: 0Hz; Power: 25W • Class I Vehicular Swing Gate Operator

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.

®

www.mightymule.com • 800-543-4283

MMDDYY

GTO Access Systems, LLC - Tallahassee, Florida USA

MM200 SERIES

DC Swing Gate Operator
P/N MM260

Conforms to UL STD 325
Certified to CSA STD C22.2 No.247

Class I Vehicular Gate

S/N:

MM260-0000000

9901178

Important Safety Information

Required Safety Precautions for Gates

These warning labels should be found at the locations specied below. If any of them are missing, immediately

contact GTO for replacements.

MM260 Installation Instructions ix

Technical Specications

Gate Weight

Gate Length

Number of Cycles Per Day

Mighty Mule 260 Gate Capacity /Cycle Chart

Estimated number of daily cycles, based on use with a transformer.

300 lbs.
150 lbs.
100 lbs.

50 lbs.

77
82
87
92

5’ - 6’

72
77
82
87

8’

67
72
77
82

10’

62
67
72
77

12’

Mighty Mule 260 Gate Opener

DRIVE

• Low friction screw drive (linear actuator) rated for -5 ºF to +160 ºF (-20 ºC to +71 ºC).

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

• Maximum opening arc of 110º. Approximate opening time (90º): 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 Mighty Mule transformer or optional Mighty Mule Solar Panels.
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 microprocessor-based control board for single leaf, pull-to-open gate installations.

• A circuit on the control board regulates charging. "Sleep draw" is 15 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 26
stroke is 13".

• Adjustable auto-close timer (OFF, 3 to 120 seconds), and Dual Sense Technology 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 edge sensors and photoelectric sensors.

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

3

/

8", mounting point to mounting point. Maximum

• The Gate Capacity Chart shows approximate cycles, per day, you can expect from the Mighty Mule Automatic Gate Opener when
powered with a transformer and 12 volt battery, prior to the battery depleting to a state where the unit will not function. Actual cycles
may vary slightly depending upon the type and condition of gate and installation.

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 specications. These specications

are subject to change without notice.

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

x MM260 Installation Instructions

OPERATIONAL CAPACITY

Before You Begin

POWERING OPTIONS

1. Determine Charging Option for Battery: Transformer OR Solar

NEVER USE TRANSFORMER AND SOLAR PANEL(S) AT

THE SAME TIME. It will damage the control board.

IMPORTANT:

• The Mighty Mule gate opener is designed and intended for use with a 12 Volt automotive or marine type battery.
The battery must be placed inside a weatherproof case and located within 6 feet of the opener arm. The 8 foot
harness supplied connects the battery to the opener arm.

• 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 [FM121]. 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 [RB509]. 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 prior to the

battery depleting to a state
where the unit will not function. The gures shown are
for winter (minimum sunlight). Accessories connected
to your system will draw additional power from the
battery.

Deep cycle marine battery is recommended for solar
and/or high trafc applications.

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

MM260 Installation Instructions xi

A - Level
B - Plumb
C - Free Swinging
D - Secured Posts in

Concrete

Before You Begin

Check Existing Gate Size and Material

• Gate size: Up to 12 feet or up to 300 lbs—See chart
on page x.

• Type of gate material: Vinyl, aluminum, chain link, farm
tube, wrought iron, wood (not recommended for solid
surface gates).

IMPORTANT: Check for Proper Gate Installation

• The gate must be plumb, level, and swing freely on its hinges.

• The gate must move throughout its arc without binding or dragging on the ground.

• Wheels must NOT be attached to the gate.

• Gates over 250 lb. should have ball bearing hinges with grease ttings.

• Post must be secured in the ground with concrete (minimizes twist/ex when the operator 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).

• We recommend you position the operator near the center-line of the gate to keep the gate from twisting and exing, and to
avoid back-splash from rain.

A

F

E

B

Gate Grounding

• Shorter wire (6 AWG) is better, 1 to 2 feet

recommended.

• Bolt ring terminal at end of cable 4 - 6 inches

above ground level.

R4196 Kit Includes:

• Ground Rod Clamp

• 6 AWG Wire (3 feet)

NOTE: No grounding system absolutely protects
against lightning strikes. If installed correctly, a
grounding system will help minimize damage to

your gate opener.

xii MM260 Installation Instructions

C

E - Center line Mounting
F - Good Working Hinges (ball bear-

ing hinges are recommended on
gates over 250 pounds)

Metal Gate

Post

6 AWG Wire

8 Foot Ground Rod

5/8” Copper Clad Steel (not included)

- available at local homecenter and hardware stores -

D

Ground Rod
Clamp

Items Included

B

Operator

Arm

F

A

Control Box

Gate Bracket

H

Post Pivot Bracket

L M

8” Nylon Cable Tie (14)

3/8” Bushing (1)

P

3/8” x 8” Bolt (2)

T

3/8” x 2-3/4” Bolt (2)

V

3/8” x 1-1/2” Bolt (1)

U

5/16” x 1-1/2” Bolt (1)

W

2” Mounting Screw (3)

C

I

Post Bracket

Transformer Warning

WARNING

D

Installation

Installation Overview for the...

!

Video

E

Injury Or Death

Moving Gate Can Cause

1. KEEP CLEAR! Gate may move at any time.
play in gate area.

2. Do not allow children to operate gate or
must use a separate entrance.

3. This gate is for vehicles only. Pedestrians

Closed Position

Stop Plate

Transmitter (1)

O

5/16” Washer (1)

Q

Hairpin Clip (2)

S

3/8” Washer (6)

X Y Z

3/8” x 1-1/2” Clevis Pin (2)

3/8” Lock Nut (5)

Sign

J

K

5/16” Lock Nut (1)

MM260 Installation Instructions xiii

Before You Begin

Tools Needed

3/8” Bit

Drill

Level

Clamps

5/16” Bit

Pliers

Hack Saw

wrench

Items Not Included

• 12 Volt automotive or marine battery and a weather
proof case.

• Low voltage wire will be needed to run from the
transformer to the control box; length depends
upon the distance between the transformer power
supply and the control box. See Transformer Wiring
Installation on page 5, and the accessory catalog.

• PVC conduit.

• If your gate is more than 1000' away from an ac
power source you will need to use at least one
Mighty Mule 5 watt solar panel to trickle charge the
battery. See the accessory catalog (Do not use both
transformer and solar).

• If you have thin walled tube or panel gates, see
Recommended Reinforcement Examples after Step
3 of “Mounting Operator to Gate”.

Pen

1/2”

wrench

9/16”

Adjustable

Wrench

Philips Head

Screwdriver

Wire

Stripper

• 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 Gate Bracket Mounting Examples
after Step 3 of “Gate Operator Installation.”

• Surge protection for transformer.

• Some types of installations require u-bolts.

• Additional washers or a metal plate may be
needed for wooden post.

• Weatherproof cover for outdoor outlet and
transformer.

• Strain relief bushings for wiring accessory devices
to control box.

• If post is more than 6”, bolts longer than 8”
are needed.

Center
Punch

Hammer

Flat Head

Screwdriver

Small

Flat Head

Tape

Measure

xiv MM260 Installation Instructions

GATE OPENER INSTALLATION

1

V

H

I

Assemble post bracket parts.

3

3

S

Y

!

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.

2

X

Gate

Bracket

Thin Walled

Tube Gate

B

X

M

F

Gate

Bracket

Wood or Metal

Reinforcement

(not supplied)

S

Q

Attach opener to gate and post bracket and secure with re­quired hardware.

Reinforcement and Gate Bracket Mounting

Muffler Clamp
(not supplied)

Q

With Gate in OPEN position, using clamps, secure opener to
gate post and center cross member of gate.

2

5

4

!

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.

2

1

1

Panel

Gate

1” x 6” Wood Reinforcement

Gate

Bracket

FRONT VIEW

SIDE VIEW

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

Remove excess bolt length
with hacksaw or bolt cutters

Recommended reinforcement and gate bracket mounting
examples.

5

1" Min. - Pinch-Point Clearance

2

Top View

7”–13"

stroke

Closed

1" Min.

1

Position

Open
Position

Remove clevis pin from the gate bracket and support loose
opener.

Swing gate and opener arm to the CLOSED position-check clearance/
binding by inspecting alignment. Arm stroke should be a minimum
of 7” and maximum of 13”.

TIP: Turning the pivot bracket over gives

more hole alignment options for the post pivot bracket assembly.

MM260 Installation Instructions 1

GATE OPERATOR INSTALLATION

1

6

!

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.

2

1

OPEN gate and reattach opener with clevis pin. Check for level.
Clamp securely.

68

3

3

!

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.

7

U

O

Z

Secure post pivot bracket to post bracket with the hardware
provided (O,U,Z) when you have achieved the 1” clearance
shown in Step 5 in both open and closed positions.

9

Mark middle of post bracket slots on fence post. Mark middle
of gate bracket slots on gate cross support.

5

10

Drill holes completely through gate post and gate cross sup-
port.

2 MM260 Installation Instructions

Remove clamps, post bracket, gate bracket, and opener. Then
use a hammer and center punch to mark
hole positions.

11

611

Y

S

P

Attach post bracket assembly to fence post. NOTE: Must be
through bolted.

GATE OPERATOR INSTALLATION

612

1

3

14

2

13

1

Y

S

!

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.

2

1

T

2

Attach and secure opener assembly to brackets.Attach gate bracket assembly to gate cross support.

15

!

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.

Check for level. Adjust post bracket if necessary. Tighten all bolts and remove excess length on post and gate

CLOSED POSITION STOP PLATE INSTALLATION

1

5

4

J

Remove the arm from the front bracket then attach gate stop to the lead­ing edge of the gate with one of the following:

• U-bolts—tube and chain link gates (Not included)

• Wood/lag screws—at aluminum/wood supports (Not included).

bracket bolts with hacksaw.

2

5

1

1

2

Position gate stop with gate CLOSED to fence post. Tighten
fasteners. Cut off excess bolt length.

MM260 Installation Instructions 3

12 VOLT BATTERY

CONTROL BOX & BATTERY INSTALLATION

1

!

WARNING

Moving Gate Can Cause

InjuryOr Death

1.KEEP CLEAR! Gate maymove at any time.

2.Donot allow children to operate gateor
playin gate area.

3.This gate is for vehiclesonly.Pedestrians
mustuse a separate entrance.

Mount control box on piece of treated plywood then attach it to
post or fence using screws.

3

!

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.

2

!

WARNING

Moving Gate Can Cause

Injury Or Death

1.KEEP CLEAR! Gatemay move atany time.

2.Donot allow children to operate gate or
playin gatearea.

3.This gate is for vehiclesonly. Pedestrians
mustuse a separate entrance.

Locate control box mounting area. IMPORTANT: Be sure to mount
box at least 3 feet from AC power and 3 feet off the ground.

4

12 VOLT BATTERY

Make sure control box is turned OFF. Place 12 Volt battery and
weatherproof battery box within 6 feet of the control box Attach the
battery harness wires from the control box to the battery terminals.

5

!

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.

12 VOLT BATTERY

Tighten the bolts, washers, and nuts and place the cover on the
weatherproof box. IMPORTANT: Do not connect the transformer
or solar panel directly to the battery.

6

Top View

Min 3 Ft

Max 1,000 Ft

GTO Transformer

Mounts Here

Use PVC conduit from ground up to control box.

4 MM260 Installation Instructions

Locate power outlet and identify wire path to control box.
NOTE: If OUTLET is OUTSIDE use weatherproof cover.

S9.8874

POWER

OFF

120

AUTO CLOSE

TIME

MIN

MAX

STALL

FORCE

ON OFF

SG1

ED1

K1

06

AVR-ISP

D1

C2

C7

C15

LED3

D15

R20

IC4

D16

D13

D14

K2

BATT- BATT+

STATUS

ANT SHLD

S9.8874

EDGE

COM

LOCK+

LOCK -

PGOK200 Rev. XC

M_BLK
M_RED

VAR2

GRN

VAR3

VAR3

VAR1

VAR4

VAR5

PF1

VAR6

WHT

GTO Inc. Tallahassee, FL

CYCLE

EXIT

SAFETY

COM

CHGR

CHGR

TRANSFORMER WIRING INSTALLATION

NOTE: If using a solar panel charging kit, go to page 6.

WARNING

Before digging contact local authorities to locate underground utilities such as electric and gas service.

1

C

1

1

2

Strip 1/2” off 2 wires and twist ends. Attach wires to trans­former screw terminals.

3

STALL

AUTO CLOSE

TIME

FORCE

C7

MIN

120

MAX

OFF

ED1

STATUS

S9.8874

AVR-ISP

SG1

ANT SHLD

4”

POWER

LED3

CHGR

CHGR

VAR1

COM

SAFETY

VAR3

EXIT

VAR4

CYCLE

VAR5

EDGE

VAR6

COM

VAR3

LOCK+

GRN

LOCK -

M_BLK
M_RED

PGOK200 Rev. XC

GTO Inc. Tallahassee, FL

R20

C15

IC4

D15

D16

D13

D14

C2

D1

PF1

K1

K2

WHT

VAR2

BATT- BATT+

ON OFF

06

2

AUTO CLOSE

TIME

STALL
FORCE

120

OFF

C7

MAX

C15

ED1

MIN

R20

POWER

LED3

CHGR

CHGR

COM

SAFETY

EXIT

CYCLE

EDGE

COM

LOCK+

LOCK -

PGOK200 Rev. XC

GTO Inc. Talla has see , F L

IC4

D14

D13

D16

D15

VAR1

VAR3

PF1

VAR4

VAR5

VAR6

VAR3

WHT

GRN

M_BLK

VAR2

M_RED

BATT- BATT+

S9.8874

STATUS

C2

D1

ANT SHLD

AVR-ISP

SG1

K1

K2

06

ON OFF

OFF

POSITION

With the Control Panel OFF, remove control
panel cover by unscrewing center cover fastener.

4

Correct

Wrong Wrong

Feed 4” of low voltage wire through strain relief into box with
battery wire harness.

5

POWER

LED3

CHGR

CHGR

COM

SAFETY

EXIT

CYCLE

EDGE

COM

LOCK+

LOCK -

PGOK200 Rev. XC

GTO Inc. Talla has see , F L

AUTO CLOSE

TIME

STALL
FORCE

120

OFF

C7

MAX

C15

ED1

MIN

R20

IC4

STATUS

D14

C2

D13

D16

D15

VAR1

D1

VAR3

PF1

VAR4

VAR5

VAR6

VAR3

WHT

GRN

M_BLK

VAR2

M_RED

BATT- BATT+

ANT SHLD

AVR-ISP

SG1

K1

K2

06

ON OFF

S9.8874

Attach cover back onto the control box.

Wire

Screwed into

wire insulation

Exposed strands

of wire

Insert RED and BLACK wires into CHGR terminals interchange­ably as shown.

6

SURGE PROTECTO R

Plug in transformer to power outlet. (Use of a surge protector is
highly recommended. If outdoors use weatherproof box.)

MM260 Installation Instructions 5

S9.8874

POWER

OFF

120

AUTO CLOSE

TIME

MIN

MAX

STALL

FORCE

ON OFF

SG1

ED1

K1

06

AVR-ISP

D1

C2

C7

C15

LED3

D15

R20

IC4

D16

D13

D14

K2

BATT- BATT+

STATUS

ANT SHLD

S9.8874

EDGE

COM

LOCK+

LOCK -

PGOK200 Rev. XC

M_BLK
M_RED

VAR2

GRN

VAR3

VAR3

VAR1

VAR4

VAR5

PF1

VAR6

WHT

GTO Inc. Tallahassee, FL

CYCLE

EXIT

SAFETY

COM

CHGR

CHGR

SOLAR PANEL INSTALLATION

1

Toward

Equator

Position solar panel facing sun and in a non-shaded open area
that allows 8 hours of direct sunlight for a full charge.

3

STALL

AUTO CLOSE

TIME

FORCE

C7

MIN

120

MAX

OFF

ED1

STATUS

S9.8874

AVR-ISP

SG1

ANT SHLD

4”

POWER

LED3

CHGR

CHGR

VAR1

COM

SAFETY

VAR3

EXIT

VAR4

CYCLE

VAR5

EDGE

VAR6

COM

VAR3

LOCK+

GRN

LOCK -

M_BLK
M_RED

PGOK200 Rev. XC

GTO Inc. Tallahassee, FL

R20

C15

IC4

D15

D16

D13

D14

C2

D1

PF1

K1

K2

WHT

VAR2

BATT- BATT+

ON OFF

06

2

AUTO CLOSE

TIME

STALL

FORCE

120

OFF

C7

MAX

C15

ED1

MIN

R20

POWER

LED3

CHGR

CHGR

COM

SAFETY

EXIT

CYCLE

EDGE

COM

LOCK+

M_BLK
M_RED

LOCK -

PGOK200 Rev. XC

GTO Inc. Talla has see , FL

IC4

D14

D13

D16

D15

VAR1

D1

VAR3

PF1

VAR4

VAR5

VAR6

VAR3

WHT

GRN

VAR2

BATT- BATT+

S9.8874

STATUS

C2

ANT SHLD

AVR-ISP

SG1

K1

K2

06

ON OFF

With the Control Panel OFF, remove control
panel cover by unscrewing center cover fastener.

4

Correct

Wrong Wrong

Feed 4” of the solar panel wire through strain relief into control
box.

5

POWER

LED3

CHGR

CHGR

COM

SAFETY

EXIT

CYCLE

EDGE

COM

GRN

LOCK+

M_BLK
M_RED

LOCK -

PGOK200 Rev. XC

GTO Inc. Talla has see , FL

C15

R20

IC4

D14

C2

D13

D16

D15

VAR1

D1

VAR3

PF1

VAR4

K1

VAR5

K2

VAR6

VAR3

WHT

ON OFF

VAR2

BATT- BATT+

AUTO CLOSE

TIME

STALL
FORCE

120

OFF

C7

MAX

ED1

MIN

S9.8874

STATUS

ANT SHLD

AVR-ISP

SG1

06

Reattach cover. Turn power on.

Wire

Screwed into

wire insulation

Exposed strands

of wire

Insert red (+) wire into CHGR terminal and the black (-) wire into
the COM terminal.

6

Solar Panels connect in PARALLEL

RED

BLACK

attach BLACK to the ‘COM’ terminal

attach RED to the ‘CHGR’ terminal

For multiple solar panels, wire the panels in parallel as shown.

RED

BLACK

6 MM260 Installation Instructions

S9.8874

S9.8874

SETTING PERSONAL TRANSMITTER CODE

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

1

Remove back cover of the transmitter.

Flip transmitter over. Use small screwdriver to move switches
to random positions. If you have more than one transmitter,
now is a good time to set them all with the same code.

3 4

2

1 2 3 4 5 6 7 8 9

Replace back cover of the transmitter.

WARNING: Changes, modications or adjustments not expressly
approved by GTO Access Systems, LLC could void the user’s authority
to operate this equipment. There Are No User Serviceable Parts.

NOTICE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 the FCC. 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. However, there is no guarantee that interference will not occur in a particular installation. 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:
—Reorient or relocate the receiving antenna.

—Increase the separation between the equipment and receiver.
—Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
—Consult the dealer or an experienced radio/TV technician for help.

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.

ON/OFF Switch

Make sure the control box is in the OFF position. Press and
hold transmitter button while sliding the ON/OFF switch to
the ON position. You will hear a series of beeps followed by a
pause then a single beep. Release transmitter’s button and the
beeps will stop. Your personal code is now programmed. This

process may take 8-10 seconds.

NOTE: All transmitters set to the same DIP switch code will
now operate the gate opener.

MM260 Installation Instructions 7

SETTING CLOSED LIMIT POSITION

1

AUTO CLOSE

TIME

STALL

FORCE

120

OFF

C7

MAX

C15

R20

IC4

POWER

D14

LED3

CHGR

CHGR

COM

SAFETY

EXIT

CYCLE

EDGE

COM

LOCK+

LOCK -

PGOK200 Rev. XC

GTO Inc. Tall aha sse e, FL

C2

D13

D16

D15

VAR1

D1

VAR3

PF1

VAR4

K1

VAR5

K2

VAR6

VAR3

WHT

GRN

M_BLK

VAR2

M_RED

BATT- BATT+

With gate in the open position, (arm retracted) turn the
control box ON/OFF switch to the off position. Press and hold
the transmitter while sliding the ON/OFF switch to the ON
position and you will hear a series of beeps a pause then a
single beep. At that point release the the transmitter button.
This process may take 8 - 10 seconds.

ON OFF

ED1

MIN

S9.8874

STATUS

ANT SHLD

AVR-ISP

SG1

06

ON/OFF
SWITCH

2

Press and hold transmitter; gate should start closing. Release
transmitter button when gate reaches desired CLOSED position.
NOTE: If your gate stops and reverses before it fully closes, you
may need to increase the stall force. (See page 9)

3

Press and hold transmitter again; gate should start opening.
Release transmitter button when single audible alarm sounds
indicating that gate has reached OPEN position.

4

Gate operator’s closed position is now set. Press and release
transmitter to close gate for normal operation.

8 MM260 Installation Instructions

1

POWER

OFF

120

AUTO CLOSE

TIME

MIN

MAX

STALL
FORCE

ON OFF

SG1

ED1

K1

06

AVR-ISP

D1

C2

C7

C15

LED3

D15

R20

IC4

D16

D13

D14

K2

BATT- BATT+

STATUS

ANT SHLD

S9.8874

EDGE

COM

LOCK+

LOCK -

PGOK200 Rev. XC

M_BLK
M_RED

VAR2

GRN

VAR3

VAR3

VAR1

VAR4

VAR5

PF1

VAR6

WHT

GTO Inc. Tallahassee, FL

CYCLE

EXIT

SAFETY

COM

CHGR

CHGR

MIN MAX

STALL

FORCE

POWER

OFF

120

AUTO CLOSE

TIME

MIN

MAX

STALL

FORCE

ON OFF

SG1

ED1

K1

06

AVR-ISP

D1

C2

C7

C15

LED3

D15

R20

IC4

D16

D13

D14

K2

BATT- BATT+

STATUS

ANT SHLD

S9.8874

EDGE

COM

LOCK+

LOCK -

PGOK200 Rev. XC

M_BLK
M_RED

VAR2

GRN

VAR3

VAR3

VAR1

VAR4

VAR5

PF1

VAR6

WHT

GTO Inc. Tallahassee, FL

CYCLE

EXIT

SAFETY

COM

CHGR

CHGR

MIN MAX

AUTO CLOSE

TIME

2 3

POWER

ON OFF

SG1

ED1

K1

06

AVR-ISP

D1

C2

C7

C15

LED3

D15

R20

IC4

D16

D13

D14

K2

BATT- BATT+

STATUS

ANT SHLD

S9.8874

EDGE

COM

LOCK+

LOCK -

PGOK200 Rev. XC

M_BLK
M_RED

VAR2

GRN

VAR3

VAR3

VAR1

VAR4

VAR5

PF1

VAR6

WHT

GTO Inc. Talla has see , FL

CYCLE

EXIT

SAFETY

COM

CHGR

CHGR

OFF

120

AUTO CLOSE

TIME

MIN

MAX

STALL
FORCE

SETTING DUAL SENSE DETECTION & AUTO CLOSE TIMER

Do not use the Dual Sense Stall Force adjustment to compensate for
a gate that is sticking or binding. Excessive Stall Force may cause
damage to the gate operator or gate system or Injury or Death.

The Stall Force adjustment controls the amount of force the opener
will apply against an obstruction before it stops and reverses
direction. The adjustment on the control board operates like a volume
control on a radio. It controls the amount of force the opener will

You may need to increase the stall force in cold weather due to increased resistance from gate hinges. However, the adjustment must
remain as near to minimum as possible and when the weather improves decrease the setting to the appropriate position.

NOTE: The stall force setting must at the lowest (minimum) possible position.

apply to an obstruction before it automatically reverses direction.

The Stall Force adjustment is located on the control board. Turn
the “STALL FORCE” arrow in the center of the potentiometer with
small at head screwdriver. Adjust the sensitivity from the MINIMUM
position up to the point where the gate operates without obstructing
from its own weight or the wind conditions in your area.

CAUTION

For safety reason the Dual Sense Stall Force setting on the Mighty Mule control board comes from the factory set at
MIN (minimum). This setting may need adjustment depending on the size and weight of the gate.

ALWAYS KEEP SAFETY AT THE TOP OF YOUR LIST WHEN ADJUSTING OR SERVICING YOUR GATE SYSTEM.

ometer with small at head screwdriver to determine how long
the gate will remain open before it automatically closes. The
limits are OFF and 3 - 120 seconds. The factory setting is OFF.

Close control box.Turn the “AUTO CLOSE TIME” arrow in the center of the potenti-

MM260 Installation Instructions 9

CONNECTING ADDITIONAL DEVICES

Mighty Mule strongly recommends the use of additional obstruction detection devices however we do not
endorse any specic brand names. Only use products that are listed to be in compliance with any applicable
UL safety standards and national and regional codes.

PLEASE NOTE: Contact sensors, non-contact sensors, shadow loops, etc. are not included with the Mighty
Mule. Refer to the sensor manufacturer’s instructions for information about installing accessory devices.

The Mighty Mule ONLY accepts accessory devices with normally open dry contact outputs.

WARNING

Make sure the operator power switch is turned OFF before connecting ANY
device wiring to the terminals of the controller. Unplugging the transformer
does not turn power to the operator off.

Wiring Accessories through Control Board Wiring Knockout

Remove control box cover.

Carefully remove wiring
knockout (on cover) to insert
accessory wires.

Insert accessory wires
through the knockout and
route to the accessory input
terminals on the control
board.
(See pg. 12)

Reattach control box cover.

ON/OFF Switch

Accessory Wires

(Photo beams, keypad, etc.)

10 MM260 Installation Instructions

OFF

120

AUTO CLOSE

TIME

MIN

MAX

STALL

FORCE

ON OFF

SG1

ED1

K1

06

AVR-ISP

D1

C2

C7

C15

D15

R20

IC4

D16

D13

D14

K2

BATT- BATT+

STATUS

ANT SHLD

S9.8874

M_BLK
M_RED

VAR2

GRN

VAR3

VAR3

VAR1

VAR4

VAR5

PF1

VAR6

WHT

CONTROL BOARD CONNECTIONS

NOTE:

• All accessory inputs are dry-contact, normally open, inputs. DO NOT apply external voltage sources
to these inputs.

• All accessory inputs are connected with respect to COMMON terminal.

1 CHGR: Power Input Terminals:

• Input terminals for transformer or solar panel.

INPUTS

CHARGE POWER

2 CHGR: Power Input Terminals:

• Input terminals for transformer or solar panel.

3 COM:

• Common/Negative terminal for accessory devices
and negative wire from solar panel(s).

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, or at
a position other than fully open 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 the gate is open will prevent
gate from closing.

• Activation of this input while at open limit will restart the
auto close time (if enabled).

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

ACCESSORY INPUTS

auto close time (if enabled).

6 CYCLE: (Typically for use with doorbell button or hardwired

keypad)

• Each activation at this input will cycle the operation

as follows:
….→ OPEN → STOP → CLOSE → STOP → OPEN → …

7 EDGE: (Typically for use with contact edge sensor)

• Activation of this input while gate is moving will cause it to

reverse direction for 2 seconds.

• Activation of this input while idle will prevent gate from running.

8 COM:

• Common/Negative terminal for accessory devices.

9 LOCK +: Positive terminal to connect GTO electro-mechanical lock. (FM143)

LOCK OUTPUTS

10 LOCK - : Negative terminal to connect GTO electro-mechanical lock. (FM143)

1

LED3

2

3

4

SAFETY

5

6

CYCLE

7

8

9

10

LOCK+

LOCK -

POWER

CHGR

CHGR

COM

EXIT

EDGE

COM

MM260 Installation Instructions 11

POWER

LED3

EDGE

COM

LOCK+

LOCK -

M_BLK

M_RED

GRN

VAR3

VAR3

VAR1

VAR4

VAR5

VAR6

CYCLE

EXIT

SAFETY

COM

CHGR

CHGR

CONNECTING ACCESSORIES

1 32 4 5 8 9

6 7

10

10

9

GTO Lock

7

8

Edge Sensor

3

6

Mighty Mule
Push Button Control

2

3

1

ABC

DEF

5

6

4

JKL

MNO

GHI

8

9

7

TUV

WXY

PRS

0

3

6

Mighty Mule Keypad

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

12 MM260 Installation Instructions

Blue

4

8

GTO Photo Beams

5

Black

Red

8

Yellow

+

Shield

-

Mighty Mule
Vehicle Sensor

Refer to Vehicle Sensor
manual for additional
information if needed.

MAINTENANCE

Monthly, test the obstruction and entrapment protection systems.

Monthly, service the gate operator (make sure the power switch is OFF). Clean extended operator arm with a soft, dry clean cloth. After
cleaning, apply a high quality silicon spray to a soft dry cloth and wipe the push/pull tube. DO NOT directly spray the tube!

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.

Monthly, turn off the power switch and disconnect the Mighty Mule and move the gate to make sure the gate is moving freely without
sticking or binding. Lubricate the hinges or repair the gate as required before reattaching the Mighty Mule.

Monthly, check the gate system for potentially entrapments from new landscaping or construction. Eliminate or guard as required.

Monthly, check that the warning signs are mounted on each side of the gate and clearly visible. Replace the signs if they are missing or
damaged.

Replace batteries every 2-3 years and properly recycle old batteries.

TROUBLESHOOTING GUIDE

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

Audible Feedback

Symptom Diagnosis Check:

1 or more short beeps
upon power up

Rapid beeping Circuit Board Senses an

1 beep every 20 seconds
off

2 beeps every 2 seconds Position sensor is short

1 beep every 2 seconds off Position sensor is open

1 beep when attempting to
run the gate

Circuit Board Powered
Up & Ready

Obstruction

Low Battery Condition • Transformer or Solar Panel Voltage

circuit.

circuit.

Blown fuse
Battery is low or damaged
Loose Connection

• Normal Operation

• Path of Gate

• Gate for Level and Plumb

• Stall Force Adjustment

• Disconnect Obstruction Detection Devices

• Charge the battery if solar conditions have been poor

• Battery Harness Connections

• Battery Under Load

• Arm Power Cable for Damage

• Arm Power Cable for Damage

• Check and replace fuse

• Test battery voltage

• Check all connections

Additional information can be found online 24 hours 7 days a week at the

GTO Tech Wizard (support.gtoinc.com/Support/TroubleShooter.aspx)

MM260 Installation Instructions 13

Visual Feedback

Symptom

TROUBLESHOOTING GUIDE

Diagnosis Check:

Power (green) ON AC or Solar Power

Present

Power (green) OFF No AC or Solar Power Transformer:

Normal Operation

• Breaker or GFI

• Power at AC outlet.

• Output of Transformer.

• Voltage on wire at 18 VAC Input

Solar:

• Solar Panel Wires Reversed

• Weather

• Solar Panel Placement

• Output of Solar Panel

• Voltage on wire at Solar Input

14 MM260 Installation Instructions

REPAIR SERVICE

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

1. First use the procedures found in the Maintenance &
Troubleshooting Guide (see page 13 and 14).

2. For 24 hour 7 days a week trouble shooting and support
online go to our TECH WIZARD site at...

support.gtoinc.com/Support/TroubleShooter.
aspx

3. 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 rear of control arm) and date of purchase when
calling for assistance.

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

5. Include a copy of your receipt and 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 Access

Systems, LLC • 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. Items
returned to GTO freight collect WILL NOT be accepted. Items returned without proof of
purchase will not be repaired under warranty.

For 24 hour 7 days a week trouble shooting and sup­port online go to our TECH WIZARD site at...
support.gtoinc.com/Support/TroubleShooter.aspx

The Mighty Mule Technical Service Department is open

Monday – Friday 8:00 A.M. – 7:00 P.M. (Eastern Time)

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

Telephone [phone]

MM260 Installation Instructions 15

Conversion Chart

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

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 right hand side of the control box), 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.

16 MM260 Installation Instructions

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 (FM121)

The Solar Panel is a 5 watt solar powered battery charger for use with the Mighty Mule 260 gate
operator systems. Particularly suited for remote installations, each Solar Panel comes with tubular steel
support, mounting clips, wire connectors, and 10 ft. of low voltage wire (see Low Voltage Wire for additional
wire). The Mighty Mule control board has clearly labeled terminal connections for easy installation of
the Solar Panel. Installation in some regions of the world will require multiple solar panels for adequate
charging power.

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)

The Pin Lock substitutes for the clevis pin at the front end of the Mighty Mule gate openers. Helps prevent
theft of the operator from the gate, while allowing quick release 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 (when used with in conjunction
with a garage door receiver – RB709U-NB). (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 identication code that you provide. Keypad can be
programmed to use up to 25 different personal identication number (PIN) codes. Each code is face
programmable with additional security features built in. Wired installations require 16 gauge, low voltage,
stranded, dual conductor, direct burial wire (sold separately). Requires three AA batteries (not included).

Mounting Post (FM100) - In Ground

This black powder coated pedestal is designed to provide convenient access to your keypad, wireless
intercom, or other access control device from your vehicle. With its break down design it is easy to install and
works well in most standard applications. Surface Mount Flanges (F102) and Extensions (F103) for added
height are available.

Mighty Mule

Vehicle Sensor (FM138)

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

Automatic Gate Lock Pull-to-Open (FM143)

A MUST for added security. Solenoid driven, with a steel housing. Used with Mighty Mule DC swing gate
operating systems for maximum stability and security. Comes with a keyed manual release.

MM260 Installation Instructions 17

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. Up
to 500 feet reception.
Additional base stations available (F3101MBC).

Low Voltage Wire (RB509)

The 16 gauge, stranded, dual conductor Low Voltage Wire is for connecting the AC powered transformer, or the
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.

Replacement Transformer (RB570)

Standard 18 volt, 2260 mA, AC transformer for maintaining the battery with the Mighty Mule gate operator.

Garage Door Receiver (RB709U-NB)

The Garage Door Receiver allows you to use the same 2 button Mighty Mule entry transmitter to operate your gate operator
and your garage door operator. Compatible with most garage door operators.

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.

If you have a question about any special order item, call 1-800-543-4283

The contents of all material available on this installation manual are copyrighted by GTO Access Systems, 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¨, “Dual Sense Technology” are registered trademarks of GTO Access Systems, LLC, America’s DIY Automatic Gate Openers is a trademark of GTO Access Systems, LLC and

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

18 MM260 Installation Instructions

Copyright infringement is a violation of federal law.

are the exclusive property of GTO Access Systems, LLC (“GTO”).

Gate Operator Installation Checklist

1. The gate has been checked to make sure it is level and moves freely in both directions.

2. Potential pinch areas have been guarded so as to be inaccessible OR have
sensing edges and/or photo beam obstruction detection devices installed.

3. The installer has installed one or more contact or non-contact
obstruction sensing devices, if required for this installation.

4. If pedestrian trafc is expected, a separate pedestrian gate has been installed, a minimum

of seven feet from the gate system. All pedestrian trafc must use the pedestrian gate.

5. Warning signs have been installed on each side of the gate in highly
visible locations. These signs must remain at all times.

6. There are no controls installed on the gate operator, or within 10 feet of the gate.

7. The Dual Sense Technology™ feature has been properly adjusted and tested to make
sure that the gate stops and reverses a short distance with minimal resistance applied.

8. Reviewed and understand all of the operational functions,
obstruction sensing devices, warning beeper and reset, etc.

9. Review and understand the proper use of the operator’s manual disconnect feature. The
manual disconnect must never be used while the gate is in motion. The power switch
must be turned off before using the manual disconnect and disengaging the operator.

10. Reviewed all safety instructions, and keep the safety instructions
and owner’s information sheets for reference.

11. Review and understand the maintenance schedule for both the gate and the gate operator.

3121 Hartseld Road • Tallahassee, Florida, USA 32303

Telephone Mighty Mule Sales: 1-800-543-4283 • Fax [phone]

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

www.mightymule.com