Mighty Mule MM562 User manual

Printed in China for GTO Access Systems, LLC. Copyright©2016 GTO Access Systems, LLC
Document Number: R56208 REV A (12.19.16)
GTO Sales: 800-543-4283 • Fax [phone]
GTO Technical Service 800-543-1236
For 24 hour/day, 7 day/week Technical Service visit http://support.gtoinc.com
For more information on Mighty Mule’s full line of Automatic Gate Operators and Access Controls visit
www.mightymule.com
MM562
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
Receiver
Post Bracket
Control Box with Battery
Fence Post Set in Concrete
Run 1000' (max.) of low
voltage wire to control
box from transformer
(wire not included).
Power Cable
PVC conduit (not included)
to protect wire from lawn
mowers and weed eaters.
PVC conduit (not included)
to run second opener power
cable under driveway.
Gate Bracket
Warning Sign
First Gate Opener Second Gate Opener
Horizontal Support Post Bracket
Gate Bracket
120 Volt indoor
Transformer
(surge protector
not supplied)
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
i
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
KEEP THESE INSTRUCTIONS FOR FUTURE REFERENCE
Gate Opener Class Categories -------------------------------------------------------------inside cover
Units and Standards Conversion Chart ---------------------------------------------------inside cover
PLEASE READ THIS FIRST! --------------------------------------------------page iii
Important Safety Instructions --------------------------------------------------page 1
Disconnecting the Opener -------------------------------------------------------------page 1
Important Safety Instructions for the Consumer------------------------------------page 2
Secondary Means of Protection Against Entrapment ------------------------------page 5
Required Safety Precautions for Gates-----------------------------------------------page 6
Warning Signs and Labels -------------------------------------------------------------page 7
Installation --------------------------------------------------------------------------page 8
Technical Specications ---------------------------------------------------------------page 8
Installation Overview ----------------------------------------------------------------page 9
Parts List --------------------------------------------------------------------------------page 10
Installation of the Mounting Hardware ----------------------------------------------page 12
Mounting the First Opener-------------------------------------------------------------page 16
Installing the Second Opener----------------------------------------------------------page 16
Installation of the Closed Position Stops --------------------------------------------page 17
Mounting the Control Box ------------------------------------------------------------page 19
Running Power Cables Into Control Box -------------------------------------------page 20
Connecting Opener Power Cables ---------------------------------------------------page 21
Powering the System --------------------------------------------------------------page 22
Solar Chart------------------------------------------------------------------------------- page 22
Connecting the Transformer-----------------------------------------------------------page 23
Control Board Settings ----------------------------------------------------------page 25
DIP Switches ----------------------------------------------------------------------------page 25
Setting Closed Position Limits--------------------------------------------------------page 26
Setting Your Personal Transmitter Code ----------------------------------------page 27
Setting Dual Sense Detection ---------------------------------------------------------page 28
Setting Auto Close Timer -------------------------------------------------------------page 28
Installing the Receiver -----------------------------------------------------------------page 27
Connecting Additional Devices -----------------------------------------------------page 29
Wiring Accessories ---------------------------------------------------------------------page 30
Push to Open Installation --------------------------------------------------------page 32
Setting Open Position Limits----------------------------------------------------------page 33
Troubleshooting Guide -----------------------------------------------------------page 33
Maintenance ------------------------------------------------------------------------page 37
Repair Service ---------------------------------------------------------------------page 38
Accessory Catalog ----------------------------------------------------------------page 39

iii
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). By purchasing an
accessory bracket, the Mighty Mule Gate Operator
can accommodate a push-to-open single leaf gate
(gates that open out from the property). The gate
must not exceed 18 feet in length or weigh more
than 850 pounds (please see Technical Specications
on page 8). 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-GATE).
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 18 feet or weighing
more than 850 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.

MM562 Installation Instructions 1
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. They do, however, provide an overview of
the safe design, installation, and use of this product.
CAREFULLY READ AND FOLLOW ALL
SAFETY PRECAUTIONS, WARNINGS, AND
INSTALLATION INSTRUCTIONS TO ENSURE
THE SAFE SYSTEM DESIGN, INSTALLATION,
AND USE OF THIS PRODUCT.
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 unauthorized removal of the operator from the
gate (see accessory pages in back of this book).
Important Safety Information

2MM562 Installation Instructions
Entrapment Zones for a
Pull-To-Open Application
Gate in the 
Open Position
Gate in the 
Open Position
ZONE 2
ZONE 3
ZONE 4
ZONE 5
Driveway
ZONE 1
ZONE 2
ZONE 4
ZONE 5
ZONE 3
For the Installer and End User
Important Safety Information
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 9).
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 1).
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 6).
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.
WARNING
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:

MM562 Installation Instructions 3
Pull-To-Open Application
Moving Gate
Area
Moving Gate
Area
Driveway
10'10'
10'10'
10'10'
NEVER INSTALL
any control device
within gray area
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 2:
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.
Important Safety Information

4MM562 Installation Instructions
For the Installer and End User
Important Safety Information
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 GATES PROPERLY MAINTAINED.
Always turn power to operator OFF before
performing any maintenance. See page 33 for
maintenance procedures.
7. To operate this equipment safely, YOU must
know how to disconnect the operator for manual
gate operation (see page 1). 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. One
will be provided to you.

MM562 Installation Instructions 5
500
UL325SERIES
®
E-ZGATEOPENER
1-800-543-GATE(4283)
www.mightymule.com
Vehicular GateVehicular Gate
Photo Beam
(recommended, not included)
Photo Beam
(recommended, not included)
Sensing Edges
(recommended, not included)
Sensing Edges
(recommended, not included)
Leading Edges
of gates
For the Installer and End User
Important Safety Information
Mighty Mule gate operators utilize Dual Sense Tech-
nology entrapment protection. Dual Sense Technology
is built into every Mighty Mule and provides redun-
dant 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
operator for obstruction protection functions shall be
located where the transmission of the signals is not
blocked or impeded by building
structures, natural landscaping or similar
objects.
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 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.

6MM562 Installation Instructions
Warning SignWarning Sign
Pedestrian Gate
Bulldog Pedestrian
Gate Lock
(recommended, not included)
Vehicular GateVehicular Gate
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.
!

MM562 Installation Instructions 7
Product identification and manual operation instruction
label installed on right hand side of control box.
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.
WARNING
!
MOVING GATE
Can Cause Injury or Death
1-800-543-GATE (4283) • www.mightymule.com
562
®
Logo and warning labels (4) installed on each side of
the operator housings
9901178
TO MANUALLY OPEN AND CLOSE THE GATE:
1. Turn control box power switch OFF.
2. Disconnect front or rear mount from mounting bracket.
3. Pull operator away from mounting brackets and move gate.
Disconnect operator ONLY when the control box power
switch is OFF and the gate is NOT moving.
Serial Number: MM562-0000000
MMDDYY
GTO Access Systems, LLC - Tallahassee, Florida USA
Conforms to UL STD 325
Certified to CSA STD C22.2 No.247
Maximum Gate: 850 lb. (385.5 kg); 18 ft. (5.5 m)
Voltage: 12 Vdc; Frequency: 0 Hz; Power: 25 W
Class I Vehicular Swing Gate Operator.
MM500 SERIES DC Swing Gate Operator
P/N MM562
Control Box label with Manual Open and
Close instructions
TO MANUALLY OPEN AND CLOSE THE GATE
1. Turn opener power switch OFF.
2. Disconnect front and rear mount from mounting brackets.
3. Remove opener from mounting brackets and move gate.
Disconnect opener ONLY when the power switch is OFF and
the gate is not moving.
www.mightymule.com
1-800-543-GATE (4283)
®
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

8MM562 Installation Instructions
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 case hardened steel gear reducer. Motor speed reduced to 260 rpm.
• Maximum opening arc of 110º. Approximate opening time (90º): 20 seconds, depending on weight of gate.
POWER
• The system is powered by two 12 Vdc, 7.0 Ah, sealed, rechargeable acid batteries.
• Battery charge is maintained by a18 Vac output transformer or optional solar panel(s). One (1) blade-style control
board fuse rated for 25 A.
NOTE: The transformer should not be directly connected to any battery. Do not replace fuses
with higher ampere rated fuses; doing so will void your warranty and may damage your control board.
• Battery charge is maintained by GTO Solar Panel Charger kit (10 Watt minimum).
CONTROL
•GTO microprocessor-based control board is set for single leaf, pull-to-open gate installations. DIP switches can be
adjusted to accommodate an optional kit for push-to-open gates (see Accessory Catalog).
• A circuit on the control board regulates charging. "Sleep draw" is 40 mA; "active draw" is 2 to 5 A.
• Auto-memorization of digital transmitter code.
•GTO remote-mounted RF receiver tuned to 318 MHz.
• Opener length with push-pull tube fully retracted is 401/4", mounting point to mounting point. Max stroke 20".
• Adjustable auto-close timer and Dual Sense Technology stall force.
• Power terminal bock accommodates a transformer or solar panels.
• DIP switches simplify setup of gate opener.
• Accessory terminal block is fully compatible with push button controls, digital keypads, loops, etc.
• Control board allows connection of edge sensors and photoelectric sensors.
• Audio entrapment alarm sounds if the 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 12V 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 GATE OPENER
Technical Specifications
These specications are subject to change without notice.
IMPORTANT: BALL BEAR-
ING HINGES SHOULD
BE USED ON ALL GATES
WEIGHING OVER 250 Lbs.
NOTE: "NR" indicates this
size and weight combination
is not recommended for the
Mighty Mule gate openers.
To determine the number of cycles the gate opener will perform using solar panels (see page 22)
Gate Weight
Gate Length
Number of Cycles Per Day
Mighty Mule 562 Gate Capacity /Cycle Chart
Estimated number of daily cycles, based on use with a transformer and one(1) 12 Volt battery.
850 lbs.
750 lbs.
650 lbs.
550 lbs.
450 lbs.
350 lbs.
250 lbs.
150 lbs.
100 lbs.
50 lbs.
68
73
78
83
88
93
98
103
108
113
5’ - 6’
63
68
73
78
83
88
93
98
103
108
8’
63
68
73
78
83
88
93
98
103
10’
63
68
73
78
83
88
93
98
12’
63
68
73
78
83
88
93
14’
63
68
73
78
83
88
16’
NR
NR
NR
NR
NR
63
68
73
78
83
18’
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR = NOT RECOMMENDED

MM562 Installation Instructions 9
Preparation of the Gate
Step 1
The gates must be plumb, level, and swing freely on their hinges.
Wheels must not be attached to the gates. The gates must move
throughout their arc without binding or dragging on the ground.
Note that gates over 250 lb. should have ball bearing hinges with
grease ttings.
Step 2
The fence posts must be secured in the ground with concrete so
they will minimize twist or ex when the openers are activated.
We recommend you position the openers near the centerline of the
gates to keep the gates from twisting and exing and to avoid back
splash from rainwater. The addition of horizontal or vertical cross
members (if they are not already in place) to provide a stable area for
mounting the gate brackets is also important.
Installation Overview
Pull-to-Open Gates (Gate Opens into the Property)
The diagram shown below is an example of a pull-to-open installation on a chain link fence and dual gates. Mounting the openers on
a masonry column requires special procedures; see Column Installation Information on page 36 if you intend to mount the openers
on columns. Furthermore, if you have push-to-open gates, you will need to purchase two (2) push-to-open brackets (see Accessory
Catalog) to properly congure your system. See Push to Open Installation on page 30 before proceeding.
Horizontal Cross Member
Vertical Cross Member
500
UL325SERIES
®
E-ZGATEOPENER
1-800-543-GATE(4283)
www.mightymule.com
Gate swings evenly and freely
hung firmly and plumb
Receiver
PVC conduit (not included)
to protect second opener
power cable and low voltage wire
from lawn mowers and weed eaters.
Control box
with batteries
Concrete poured around gate post
6' Power cable
Closed position plates
120 Volt indoor
transformer
(surge protector
not supplied)
Second gate opener Master gate opener
Post bracket assembly
Gate bracket
Run 1000' (max.) of low
voltage wire to control
box from transformer
(wire not included).
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.
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

10 MM562 Installation Instructions
Dual Gate Opener Parts List
Opener and Mounting Hardware
Hairpin Clip (4)
3/8" x 1-1/2" Clevis Pin (4)
5/16" x 1-3/4" Bolt (2)
3/8" x 2" Bolt (2)
3/8" x 3" Bolt (4)
3/8" x 8" Bolt (8)
8" Nylon Cable Tie (20)
3/8" Washer (18)
3/8" Lock Washer (14)
5/16" Washer (2)
3/8" Nut (14)
5/16" Nut (2)
Hardware
Gate Opener (1)
w/ 6' Power Cable
Gate Opener (1)
w/ 32' Power Cable
Gate Bracket (2) Post Pivot Bracket (2)
Customer Support Card (1)
Post Bracket (4)
Closed Position
Stop Plate (2)
2" Mounting Screw (5)
®
E-Z GATE OPENER
3/8" Bushings (4)
Installation Video (1)

MM562 Installation Instructions 11
Tools Needed
• Power Drill
• Open End Wrenches — 9/16" and 1/2"
• Long 3/8" and 5/16" Drill Bit
• Hacksaw or Heavy Duty Bolt Cutters
• Small (Flat Bladed) Screwdriver
• Phillips Screwdriver
Dual Gate Opener Parts List (continued)
Control Box and Electrical Components
Transformer (1)
Battery (1)
Control Box (1)
Warning Signs (4)
GTO Transmitter(1)
1. KEEP CLEAR! Gate may move at any time.
2. Do not allow children to operate gate or
play in gate area.
3. This gate is for vehicles only. Pedestrians
must use a separate entrance.
Moving Gate Can Cause
Injury Or Death
WARNING
!
Receiver (1)
• Tape Measure
• Level
• Wire Strippers
• C-Clamps — small, medium, and large
• Center Punch
• An extra person will be helpful
YOU MAY ALSO NEED THESE ITEMS BEFORE YOU BEGIN THE INSTALLATION
(Some of these items can be found in the Accessory Catalog page 37):
• 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 Powering the System on page 21, and the Accessory Catalog.
• If your gate is more than 1000' away from an ac power source you will need to use at least 10 to 30 Watts of solar charging
power to trickle charge the battery. See the Accessory Catalog.
• If your fence post is made of wood and is less than 6" in diameter or 6" square, see page 12.
• If your fence post is larger than 6" in diameter you will need threaded rods or carriage bolts longer than 8". See page 15.
• PVC conduit.
• If you have thin walled tube or panel gates, see Recommended Reinforcement Examples on page 12.
• Depending on the type of gate, a horizontal cross member or mounting plate may be needed to mount the front of the
opener and gate bracket to the gate. See page 11, step 2; page 15, step 11.
• Surge protection for transformer.
• Some types of installations require U-Bolts.
• If the gate is a push-to-open refer to page 30
• Additional washers or a metal plate may be needed for wooden post.
• Weatherproof outlet and cover if transformer is plugged into an outside outlet.

12 MM562 Installation Instructions
Installation of Mounting Hardware
POST BRACKET
The position of the post bracket determines the leverage and efciency of the
opener. The post bracket position also sets the clearance between the opener and
gate in the open and closed positions (minimum 2 inches).
The curved design of the post bracket works well for installations on round and
square fence posts. Because the post bracket carries the entire thrust of the active
opener, bolts that completely penetrate the fence post must be used.
On wooden posts, place a metal plate or washer (not supplied) between the nuts
and the fence post to prevent the thrust of the opener from pulling the bolts and
washers through the wood.
On round posts of 6" diameter or larger, the post pivot bracket may not be
necessary for the installation. In this instance, the two post brackets are mounted
by themselves.
NOTE: A fence post smaller than 6" in diameter or 6" square should be made of
metal instead of wood so that it will remain stable while the opener is moving the
gate. See examples below.
Post
Bracket
Metal
Plate
Wooden
Post
Wooden
Post
Metal
Plate
Post
Bracket
Gate Hinge
Post Bracket
without Pivot
Bracket
Pull-to-Open Installation
Larger than
6" diameter
post
GATE BRACKET
IMPORTANT: We strongly recommend using steel pipe, wood or metal to reinforce thin walled tube gates or wood to reinforce
panel gates as shown. These reinforcement methods will prevent damage to the opener and gate when the opener is installed.
Thin Walled
Tube Gate
Gate Bracket
Muffler Clamp
(not supplied)
Gate Bracket
Wood or Metal
Reinforcement
(not supplied)
Gate
Bracket
Panel
Gate
1" x 6" Wood
Reinforcement
Example using mufer clamp
for installation of gate bracket
on thick walled tube gate
(does not require drilling and is
adjustable)
Example using wood
or metal to reinforce
installation of gate
bracket on thin
walled tube gate.
Example using wood
or metal to reinforce
installation of gate
bracket on panel
gates.
Round Metal PostSquare Metal Post
Square Wood Post Round Wood Post
SIDE VIEW
TOP VIEW

MM562 Installation Instructions 13
Clevis Pin
Hairpin Clip
Post Bracket Assembly
Rear Mount
Opener
Bushing
Determining the Mounting Position
of the Post Bracket Assembly and the Gate Bracket
Step 3
With the gate in the open position (up to 110º from its closed position) and the gate opener arm fully retracted, adjust the post bracket
assembly and gate bracket until the opener is level. While holding the opener level, use C-clamps to temporarily secure the post
bracket assembly and gate bracket to the fence post and gate.
Step 1
Insert the 3/8" x 2" bolt through the
center hole of the post brackets and
post pivot bracket as shown. Fasten a
3/8" lock washer, 3/8" washer and 3/8"
nut on the end of the bolt. DO NOT
overtighten the nut because the post
pivot bracket will have to be adjusted
later.
Step 2
Attach post bracket assembly and gate bracket to the opener with the clevis pins and bushings. Secure the clevis pins with
hairpin clips.
Level Opener
Fence Post
Gate In Open Position
Opener Arm Fully Retracted
LEVEL horizontal cross member
Post Bracket Assembly
Gate Bracket
Clevis Pin
Hairpin Clip
Bushing
Gate Bracket
Front Mount
3/8" x 2" Bolt
3/8" Nut
Push-To-Open Bracket
(optional accessory)
Post Bracket
Post Bracket
3/8" Lock Washer
Post Bracket Assembly
3/8" Washer
NOTE: The following steps are
intended for pull-to-open gate
installations. If you are mounting
your gate openers on a push-to-
open gate (e.g., a gate on a sloped
driveway) you will need to purchase
two Push To Open brackets (see
Accessory catalog). Also, see Push-
to-Open Installation beginning on
page 30.

14 MM562 Installation Instructions
Gate in the
CLOSED POSITION
Pinch Area
Gate in the
OPENED POSITION
Pinch Area
2" minimum
2" minimum
20" maximum
Be sure gate opener
and bracket don't bind.
Step 4
When you feel that you have the best position for the post pivot bracket in the open
position, insert the 5/16" x 1-3/4" bolt through the aligned holes of the post bracket and
post pivot bracket to hold it in place. Remove the clevis pin from the front mount and
while supporting the gate opener, swing the gate and gate opener to the closed position.
With the gate and gate opener in the closed position check the clearance (see diagram
below) and be sure that the gate opener is not binding at the post pivot bracket.
If you don't have 2 inches of clearance or the gate opener is binding on the post pivot
bracket, remove the 5/16" x 1-3/4" bolt and readjust the pivot bracket until you can
achieve these important clearances. Reinstall the bolt and related hardware as shown.
With the post pivot bracket in the optimum position for clearance and freedom of movement while maintaining 19 inches or
less on the stroke. Reattach the opener to the gate bracket in the open position and recheck the gate opener level and make
sure the brackets are clamped securely.
If you are mounting to a post or column larger
than 8" or you can not achieve the mentioned
clearances, you can:
1) eliminate the post pivot to try and achieve
the proper clearances.
2) install the unit as a push to open (bracket not
included).
3) re-hang the gate within 4" inches of the back
corner of the column.
NOTE: Re-hanging the gate, depending on
the construction of a column, may require
additional expertise and tools/materials.
IMPORTANT:While determining the mounting point for the post pivot bracket assembly, be sure that the position allows
for minimum 2 inches of clearance between the gate and the opener in both the open and closed positions, as shown in the
diagrams below. This clearance will give the opener the most efcient leverage point for opening and closing the gate and
more importantly provides the least possible pinch area.
TIP: Turning the pivot bracket
over gives more hole alignment
options for the post pivot bracket
assembly. You can also move the
entire post pivot bracket assembly
to different positions on the gate
post to help achieve the proper
clearances.
5/16” bolt
Post Bracket Assembly
Opener

MM562 Installation Instructions 15
Installing the Post Bracket Assembly and Gate Bracket
Step 1
Mark reference points for bolt holes on the fence post through middle of bracket slots. Mark reference points for bolt holes
on the gate cross member through middle of gate bracket slots. After marking your reference points, remove the opener and
brackets from the fence and gate.
Step 2
Drill 3/8" holes into fence post
as marked.
Step 3
Fasten post bracket assembly to
the fence post using
(4) 3/8" x 8" bolts, washers,
lock washers, and nuts
(provided).
NOTE: In cases where the
fence post has a diameter larger
than 6", threaded rods or
carriage bolts longer than 8"
(not supplied) must be used.
Step 4
Drill 3/8" holes into the gate
cross member as marked.
Mount gate bracket using (2)
3/8" x 2-3/4" bolts, washers, lock washers, and nuts (provided).
NOTE: After the gate opener installation is complete and operation
of the opener system has been tested, you should remove excess bolt
length extending beyond the tightened nuts with a hacksaw or bolt
cutters.
Gate Bracket Mounting Examples
Post Bracket
Assembly
Mark fence post through 
middle of bracket slots
and drill 3/8" holes
Round Metal Post
Round Wood Post
Square Metal Post
Square Wood Post
Remove excess bolt length
with hacksaw or bolt cutters
SIDE VIEW
TOP VIEW
EXAMPLES
Round Tube & Chain Link Gate
Square Tube Gate
Mounting Plate
Created for
Decorative Gate
(required but not
supplied)
Remove excess bolt length
with hacksaw or bolt cutters
FRONT VIEW SIDE VIEW
FRONT VIEW
SIDE VIEW

16 MM562 Installation Instructions
Mounting the Master Opener
Attach the opener to the securely bolted post bracket assembly and gate bracket using clevis pins, bushings, and hairpin clips,
or the optional Pin Locks (FM133). Verify that the opener is level and adjust the post bracket assembly if necessary.
Installing the Second Opener
Install the second opener on the remaining gate leaf by repeating the same process for installing the Master Opener starting
on page 12 through page 16.
NOTE: You will need to run the Second Opener power cable and any hard wired sensor or photo beam wires under the
driveway to the control box.
After you have mounted the second opener, proceed to Installation of the Closed Position Stops on the next page.
Level Opener
Gate In Open Position
LEVEL horizontal cross member
Post Bracket Assembly
bolted to fence post
Clevis Pin, Bushing, and Hairpin Clip
Clevis Pin, Bushing, and Hairpin Clip
Gate Bracket bolted
to gate cross member
Fence Post