Mighty Mule MM260 User manual

Printed in China for GTO Access Systems, LLC. Copyright©2016 GTO Access Systems, LLC
Document Number: R26008 REV A (12-15.16)
MM260
ACCESS SYSTEMS, LLC
Mighty Mule®is the retail brand of GTO Access Systems, LLC
3121 Hartseld Road • Tallahassee, FL 32303
This product meets the requirements of UL325 6th Edition, 2016, the standard for gate
operator safety.
Installation Manual
Horizontal Support
Gate Swings Evenly and Freely
Hung Firmly and Plumb
Post Bracket
Control Box
Fence Post Set in Concrete
Run 1000' (max.) of low
voltage wire to control
box from transformer
(wire not included).
Power Cable Closed Position Stop Plate
PVC conduit (not included)
to protect wire from lawn
mowers and weed eaters.
Gate Bracket
Warning Sign
Single Gate Opener
120 Volt indoor
Transformer
(surge protector
not supplied)
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)

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.
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.
Vehicular Gate Operator Class Categories
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.

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

ii MM260 Installation Instructions
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.

MM260 Installation Instructions iii
Clevis Pin
Hairpin Clip
Gate Bracket
Front Mount
Bushing
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
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.
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
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.
CAUTION
The gate will move freely and uncontrolled when the gate operator is removed from the gate. ONLY discon-
nect the operator when the control box power switch is OFF and the gate is NOT moving.
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).
Important Safety Information

iv MM260 Installation 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 dam-
aged 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 ap-
plicable local codes.
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 installa-
tion. 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.
For the Installer and End User
WARNING
Gate in the
Open Position
ZONE 2
ZONE 3
ZONE 4
ZONE 5
Driveway
ZONE 1
Entrapment
Zones for a
Pull-To-Open
Application
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 sepa-
rate 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.
To reduce the risk of injury or death:
Important Safety Information

MM260 Installation Instructions v
II. During Installation
1. Install the gate operator on the inside of the prop-
erty 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.
4. If push buttons or key switches are installed, they
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.
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.
Moving Gate
Area
Driveway
10'
10'
10'
10'
NEVER install
any control device
within gray area
Pull-To-Open
Application
Important Safety Information

vi MM260 Installation Instructions
III. After Installation
1. Attach the warning signs (included) to each side
of the gate to alert the public of automatic gate
operation. It is your responsibility to post warning
signs on both sides of your gate. If any of these
signs or warning decals 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 1-800-
543-4283 and requesting a duplicate copy.
For the Installer and End User
Important Safety Information

MM260 Installation Instructions vii
For the Installer and End User
Mighty Mule gate operators utilize Dual Sense Tech-
nology™entrapment protection. Dual Sense Technol-
ogy™is built into every Mighty Mule and provides
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.
One or more edge sensors may be located at the lead-
ing 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.
Leading Edge
of the gate
Photo Beams
(recommended, not included)
Photo Beams
(recommended, not included)
Sensing Edges
(recommended, not included)
Vehicular 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.
Entrapment and Obstruction Protection
Mighty Mules’s Dual Sense Technology™provides entrapment protection, even when properly adjusted. Since all instal-
lations 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.
Important Safety Information

viii MM260 Installation Instructions
Warning Sign Pedestrian Gate
Pedestrian Gate Lock
Vehicular Gate
(recommended, not included)
7 foot
minimum
Important Safety Information
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 sepa-
rate 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.
Installing Warning Signs and Pedestrian Gates
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.
!

MM260 Installation Instructions ix
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
These warning labels should be found at the locations specied below. If any of them are missing, immediately
contact GTO for replacements.
Required Safety Precautions for Gates

xMM260 Installation Instructions
Technical Specications
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 263/8", mounting point to mounting point. Maximum
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.
OPERATIONAL CAPACITY
• 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.
Mighty Mule 260 Gate Opener
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’
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.

MM260 Installation Instructions xi
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.
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.
Before You Begin
POWERING OPTIONS
SOLAR PANEL AND GATE ACTIVITY CHART
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

xii MM260 Installation Instructions
E
A
B
C
D
F
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.
• 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.
Metal Gate
Post
6 AWG Wire
8 Foot Ground Rod
5/8” Copper Clad Steel (not included)
- available at local homecenter and hardware stores -
Ground Rod
Clamp
IMPORTANT: Check for Proper Gate Installation
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).
A - Level
B - Plumb
C - Free Swinging
D - Secured Posts in
Concrete
E - Center line Mounting
F - Good Working Hinges (ball bear-
ing hinges are recommended on
gates over 250 pounds)
Before You Begin

MM260 Installation Instructions xiii
3/8” x 1-1/2” Clevis Pin (2)
3/8” x 8” Bolt (2)
8” Nylon Cable Tie (14)
Control Box
Operator
Arm
Gate Bracket
Post Pivot Bracket Post Bracket
Transformer Warning
Sign
Closed Position
Stop Plate
Transmitter (1)
Installation
Video
3/8” x 1-1/2” Bolt (1)
5/16” x 1-1/2” Bolt (1)
3/8” Washer (6)
5/16” Washer (1)
3/8” Lock Nut (5) 5/16” Lock Nut (1)
Hairpin Clip (2)
2” Mounting Screw (3)
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
!
Installation Overview for the...
A
HIK
F
B
D
C
J
E
L M
Q
W
S
O
P
T
V
U
X Y Z
3/8” Bushing (1)
3/8” x 2-3/4” Bolt (2)
Items Included

xiv MM260 Installation Instructions
3/8” Bit
5/16” Bit
Drill
Pliers
Level
Clamps Adjustable
Wrench
Pen Center
Punch
Hammer
Tape
Measure
Small
Flat Head
Philips Head
Screwdriver
Flat Head
Screwdriver
Wire
Stripper
Hack Saw 1/2”
wrench
9/16”
wrench
• 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”.
• 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.
Items Not Included
Before You Begin
Tools Needed

MM260 Installation Instructions 1
12
3
55
S
V
H
I
Y
X
X
F
S
M
Q
B
Q
3
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
!
Thin Walled
Tube Gate
Gate
Bracket
1” x 6” Wood Reinforcement
Panel
Gate
Gate
Bracket
Wood or Metal
Reinforcement
(not supplied)
Mounting Plate
Created for
Decorative Gate
(required but not
supplied)
Remove excess bolt length
with hacksaw or bolt cutters
FRONT VIEW SIDE VIEW
Reinforcement and Gate Bracket Mounting
Muffler Clamp
(not supplied)
Gate
Bracket
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
!
2
4
1
2
1
1" Min. - Pinch-Point Clearance
Top View
1" Min.
7”–13"
2
1
Closed
Position
Open
Position
stroke
Attach opener to gate and post bracket and secure with re-
quired hardware.
Assemble post bracket parts.
With Gate in OPEN position, using clamps, secure opener to
gate post and center cross member of gate.
Recommended reinforcement and gate bracket mounting
examples.
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.
Remove clevis pin from the gate bracket and support loose
opener.
GATE OPENER INSTALLATION

2MM260 Installation Instructions
OPEN gate and reattach opener with clevis pin. Check for level.
Clamp securely.
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.
Mark middle of post bracket slots on fence post. Mark middle
of gate bracket slots on gate cross support.
Remove clamps, post bracket, gate bracket, and opener. Then
use a hammer and center punch to mark
hole positions.
Drill holes completely through gate post and gate cross sup-
port.
Attach post bracket assembly to fence post. NOTE: Must be
through bolted.
GATE OPERATOR INSTALLATION
1
3
511
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
!
1
2
6
U
O
Z
7
3
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
!
68 9
10
P
S
Y
611

MM260 Installation Instructions 3
1
3
511
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
!
1
2
6
U
O
Z
7
3
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
!
68 9
10
P
S
Y
611
12
3
5
612
Y
S
T
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
!
2
1
1
13
2
14
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
!
15
4
J
15
1
2
2
1
Attach and secure opener assembly to brackets.Attach gate bracket assembly to gate cross support.
Check for level. Adjust post bracket if necessary. Tighten all bolts and remove excess length on post and gate
bracket bolts with hacksaw.
Remove the arm from the front bracket then attach gate stop to the lead-
ing 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).
Position gate stop with gate CLOSED to fence post. Tighten
fasteners. Cut off excess bolt length.
GATE OPERATOR INSTALLATION
CLOSED POSITION STOP PLATE INSTALLATION

4MM260 Installation Instructions
1. KEEP CLEAR! Gate may move at any time.
2. Do not allow children to operate gate or
playin gate area.
3. This gate is for vehicles only. Pedestrians
mustuse a separate entrance.
Moving Gate Can Cause
Injury Or Death
WARNING
!
1
1. KEEP CLEAR! Gate may move at any time.
2. Do not allow children to operate gate or
playin gate area.
3. This gate is for vehicles only. Pedestrians
mustuse a separate entrance.
Moving Gate Can Cause
Injury Or Death
WARNING
!
2
12 VOLT BATTERY
1. KEEP CLEAR! Gate may move at any time.
2. Do not allow children to operate gate or
playin gate area.
3. This gate is for vehicles only. Pedestrians
mustuse a separate entrance.
Moving Gate Can Cause
Injury Or Death
WARNING
!
3
12 VOLT BATTERY
4
12 VOLT BATTERY
1. KEEP CLEAR! Gate may move at any time.
2. Do not allow children to operate gate or
playin gate area.
3. This gate is for vehicles only. Pedestrians
mustuse a separate entrance.
Moving Gate Can Cause
Injury Or Death
WARNING
!
5
Top View
Min 3 Ft
Max 1,000 Ft
GTO Transformer
Mounts Here
6
Locate power outlet and identify wire path to control box.
NOTE: If OUTLET is OUTSIDE use weatherproof cover.
CONTROL BOX & BATTERY INSTALLATION
Mount control box on piece of treated plywood then attach it to
post or fence using screws.
Locate control box mounting area. IMPORTANT: Be sure to mount
box at least 3 feet from AC power and 3 feet off the ground.
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.
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.
Use PVC conduit from ground up to control box.