Mighty Mule MM462 User manual

Printed in China for GTO Access Systems, LLC. Copyright©2016 GTO Access Systems, LLC
Document Number: R46208 REV A (04.27.16)
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
MM462
ACCESS SYSTEMS, LLC
Mighty Mule® is the retail brand of GTO Access Systems, LLC
3121 Hartseld Road • Tallahassee, FL 32303
This product meets and exceeds the requirements of UL325 6th Edition, 2016, the standard
which regulates gate operator safety.
Installation Manual
Example of nished installation
(installations vary slightly on different types of gates)
120 Volt indoor
Transformer
(surge protector
not supplied) Horizontal Support
Gate Swings Evenly and Freely
Hung Firmly and Plumb
Receiver
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
PVC conduit (not included)
to protect wire from lawn
mowers and weed eaters.
Gate Bracket
Warning Sign
First Gate Opener
Post Bracket
Second Gate Opener
Gate Bracket
Horizontal Support
PVC conduit (not included)
to run second opener power
cable under driveway.

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.

Mighty Mule FM462 Installation Instructions i
Table Of Contents
Please Read This First ...................................................................................................ii
Important Safety Instructions .................................................................................. iii–viii
How to Manually Open and Close the Gate:.............................................................. iii
For the Consumer.......................................................................................................iv
Required Safety Precautions for Gates ......................................................................vi
Secondary Means of Protection Against Entrapment ............................................... vii
Entrapment Alarm (UL 325; 30A.1.1A) ...................................................................... vii
Technical Specifications................................................................................................ 1
Before You Begin........................................................................................................... 2
Solar Panel and Gate Activity Chart............................................................................ 2
Parts List – Opener and Mounting Hardware ............................................................. 4
Tools and Materials..................................................................................................... 5
Installation Overview for Pull-To-Open Gates ............................................................. 6
Installation of the First Gate Opener ............................................................................. 7
Install Post Bracket Assembly and Gate Bracket ....................................................... 8
Attach Opener Arm................................................................................................... 10
Install the Closed Position Stop Plates..................................................................... 11
Mount the Battery Box and Control Box ................................................................... 12
Connecting the Battery ............................................................................................. 13
Remove the Control Box Cover ............................................................................... 13
Connect Opener Power Cables................................................................................ 14
Connect the Transformer ......................................................................................... 14
Set the Closed Position Limit.................................................................................... 16
Adjust the Stall Force Setting ................................................................................ 17
Set Auto-Close Time................................................................................................. 17
Personalize Your Transmitter Setting ........................................................................ 18
Push-To-Open Installation Instructions ....................................................................... 19
Solar Panel Instructions............................................................................................... 21
Connecting Accessories and Safety Devices............................................................. 22
Troubleshooting Guide................................................................................................ 24
Gate and Opener Maintenance .................................................................................. 25
Warranty Repair........................................................................................................... 25
Accessories................................................................................................................. 26

ii Mighty Mule FM462 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). 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 and weigh more than 350
pounds or exceed 8 feet in length and weigh more
than 850 pounds (please see Technical Specications
on page 9). 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 enclosed
Mighty Mule Accessory Catalog) are available at most
stores. Your store should be able to special order any
accessory not in stock. If your store cannot special
order accessories, please call the 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 to 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.

Mighty Mule FM462 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. 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 or 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

iv Mighty Mule FM462 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
I. Before Installation
1. Verify this operator is proper for the type and size of
gate, its 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 operator and safety
devices used with the system (see page 10).
3. Review the operation of the system to become familiar
with its safety features. Understand how to disconnect
the operator for manual gate
operations (see page 2).
4. This gate operator is intended for vehicular gates
ON LY. A separate entrance or gate must be
installed for pedestrian use (see page 7).
5. Always keep people and objects away from the gate and
its area of travel. NO ONE SHOULD CROSS THE
PATH OF A MOVING GATE.
6. Pay close attention to the diagram below and be aware
of these potential entrapment zones at all times.
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 increases the risk of injury. Entrapment
zones must be eliminated or protected with entrapment
protection devices such as photo beams or sensing edges
that connect to the gate operator.
For the Installer and End User
WARNING
1. READ AND FOLLOW ALL INSTRUCTIONS. Failure
to meet the requirements set forth in the instruction manual
could cause severe injury and/or death, for which the
manufacturer cannot be held responsible.
2. When designing a system that will be entered from a high-
way or main thoroughfare, make sure the system is placed
far enough from the road to prevent trafc congestion.
3. The gate must be installed in a location that
provides adequate clearance between it and
adjacent structures when opening and closing to
reduce the risk of entrapment. Swinging gates
must not open into public access areas.
4. The gate and gate operator installation must
comply with any applicable local codes.
To reduce the risk of injury or death:
Important Safety Information

Mighty Mule FM462 Installation Instructions v
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 entrapment.
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
Entrapment Zones are shown in the diagrams on page 3:
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

vi Mighty Mule FM462 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 GATES PROPERLY MAINTAINED.
Always turn power to operator OFF before
performing any maintenance. Clean the
push-pull tube with a soft, dry cloth and apply
silicone spray to it at least once per month.
7. Service the gate and gate operator regularly.
Lubricate hinges, spray push pull tube with high
quality silicone spray monthly and replace the
battery every 2-3 years.
8. To operate this equipment safely, YOU must
know how to disconnect the operator for manual
gate operation (see page 2). If you have read the
instructions and still do not understand how to
disconnect the operator, contact the Mighty Mule
Service Department.
9. Disconnect the operator ONLY when the power
is TURNED OFF and the gate is NOT moving.
10. Make arrangements with local re and law
enforcement for emergency access.
11. Distribute and discuss copies of the
IMPORTANT SAFETY INFORMATION
section of this manual with all persons
authorized to use your gate.
12. IMPORTANT: Save these safety instructions.
Make sure everyone who is using or will be
around the gate and gate operator are aware of
the dangers associated with automated gates.
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 call-
ing 1-800-543-4283 and requesting a duplicate
copy. One will be provided to you for a nomi-
nal fee.
For the Installer and End User
Important Safety Information
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

Mighty Mule FM462 Installation Instructions vii
For the Installer and End User
Important Safety Information
Mighty Mule gate operators utilize Dual Sense Tech-
nology™ entrapment protection. Dual Sense Technol-
ogy™ is build 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
operator 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
obstruction.
Entrapment Alarm
The Mighty Mule 562 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 re-
ceives 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 build in Dual Sense Technology™ entrapment protection, even when properly adjusted, may not be sen-
sitive enough to prevent bodily injury in some circumstances. For this reason, devices such as sensing edges (or photo-
electric sensors), which stop and reverse gate direction upon sensing an obstruction, are required for enhanced protection
against entrapment.
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

viii Mighty Mule FM462 Installation Instructions
Warning SignWarning Sign
Pedestrian Gate
Bulldog Pedestrian
Gate Lock
(recommended, not included)
Vehicular GateVehicular Gate
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.
!

Mighty Mule FM462 Installation Instructions ix
Product identification label (2)
installed under rear mount of each arm
Logo and warning labels (4)
installed on each side of opener housings
462®
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
MMDDYY
GTO Access Systems, LLC - Tallahassee, Florida USA
9901178
MM202 SERIES
DC Swing Gate Operator
P/N MM462
Conforms to UL STD 325
Class I Vehicular Gate
S/N: MM462-0000000
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.

Mighty Mule FM462 Installation Instructions 1
MIGHTY MULE FM462 GATE OPENER
_____________________________________ DRIVE _____________________________________
• Low friction screw drive (linear actuator) rated for -5 °F to +160 °F (-20 °C to +71 °C).
• Powered by a 12 V motor with integral case hardened steel gear reducer. Motor speed reduced to 260 rpm.
• Maximum opening arc of 110°. Approximate opening time (90°): 18 seconds, depending on weight of gate.
_____________________________________ POWER _____________________________________
• The system is powered by a 12 Vdc battery.
• Battery charge is maintained by a 120 Vac, 14 Vac output transformer (20 VA) through the GTO control board
or by optional GTO Solar Panels; the panel should generate minimum of 10 Watts. A diode on the control board
prevents battery discharge. 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 is set for dual leaf, pull-to-open gate installations. Jumper can be
removed to accommodate an optional kit for push-to-open gates.
• A circuit on the control board regulates charging. “Sleep draw” is 15 mA; “active draw” is 3 to 8 A.
• Auto-memorization of digital transmitter code.
• GTO RF receiver tuned to 318 MHz.
• Opener length with push-pull tube fully retracted is 26 3/8", mounting point to mounting point. Maximum stroke is
13".
• Adjustable auto-close timer (OFF to 3–120 seconds), and obstruction sensitivity (stall force).
• Power terminal block accommodates a transformer or solar panels.
• Accessory terminal block fully compatible with all Mighty Mule access controls.
• Control board allows connection of safety edge sensors and photoelectric sensors.
• Audio entrapment alarm sounds if unit encounters an obstruction twice while opening or closing.
_____________________________________ OPERATIONAL CAPACITY _____________________________________
• The Gate Capacity Chart shows approximate cycles, per day, you can expect from the Mighty Mule Automatic
Gate Opener when powered with a transformer. 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 specifications
listed on page 2.
* These specifications are subject
to change without notice.
Gate Weight
Gate Length
Number of Cycles Per Day
Mighty Mule FM462 Gate Capacity/Cycle Chart
Estimated number of daily cycles, based on use with a transformer.
300 lbs.
150 lbs.
100 lbs.
50 lbs.
39
41
44
46
5' - 6'
36
39
41
44
8'
34
36
39
42
10'
31
34
36
39
12'
An operation cycle is
one full opening and
closing of the gate.
Technical Specifications

2Mighty Mule FM462 Installation Instructions
1. Determine Charging Options for Battery: Transformer OR Solar
NEVER USE TRANSFORMER AND SOLAR PANEL(S) AT THE SAME TIME!
It will damage the control board!
IMPORTANT
• The battery charge is maintained by the 14 Volt transformer included OR optional solar panel(s). The transformer
OR solar panel is connected to the control board using low voltage, 16 gauge, dual conductor, stranded, direct
burial wire [RB509] (page 26).
• All low voltage wire used with the Mighty Mule Gate Opener must be 16 gauge dual conductor, stranded, direct
burial wire.
• The transformer is intended for indoor use. If the transformer can only be plugged into an outside electrical
outlet, a weatherproof cover or housing must be used.
• If your gate is more than 1000' from an AC power source, you will need to use a solar panel charging kit
(minimum 10 watts). Refer to the Solar Panels and Gate Activity Chart below.
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 10 to 20
watts of solar charging power.
The figures shown are for winter (minimum
sunlight) and do not account for the use of
any accessory items.
Accessories connected to your system
will draw additional power from the
battery and will require additional solar
panels.
NOTE: UP to 250 ft. of dual conductor, 16
guage, stranded wire may be used to allow
installation of solar panels in direct sunlight.
See page 26:
10 Watt Solar Panel [FM123]
5 Watt Solar Panel [FM121]
Dual Gate
Winter Ratings
Zone 1 Zone 2 Zone 3
10 Watts 8 16 26
15 Watts 11 20 30
20 Watts 14 28 38
Before You Begin
Zone 3
Zone 1
Zone 2
Zone 3
Zone 3
Zone 3

Mighty Mule FM462 Installation Instructions 3
2. Check Direction of Gate Swing
The Mighty Mule is designed for PULL-TO-OPEN installations. PUSH-TO-OPEN installations require two Push-To-Open
brackets [FM148]. Push-to-Open Installation Instructions begin on page 19.
3. Prepare the Gates
• 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 arcs without binding or dragging on the ground.
• Note that gates over 250 lb. should have ball bearing hinges with grease fittings.
• The gate post should be be secured in the ground with concrete so it will minimize twist or flex when the opener
is activated.
• The addition of a horizontal or vertical cross member (if one is not already in place) to provide a stable area
for mounting the gate bracket is also important.
• Trench the driveway in order to lay PVC conduit for the second opener power cable (see illustration on page 6).
Your Property Your Property
Pull-To-Open
(arm retracts to open)
Push-To-Open
(arm extends to open)
Horizontal Cross Member
Vertical Cross Member
E
A
B
C
D
F
A – Level D – Posts Secured in Concrete
B – Plumb E – Centerline Mounting
C – Free Swinging F – Good Working Hinges

4Mighty Mule FM462 Installation Instructions
Parts List – Opener and Mounting Hardware
Hairpin Clip (4)
3/8" x 1-1/2" Clevis Pin (4)
5/16" x 1-1/2" Bolt (2)
3/8" x 1-1/2" Bolt (2)
3/8" x 8" Bolt (4)
8" Nylon Cable Tie (14)
3/8" Washer (12)
5/16" Washer (2)
3/8" Lock Nut (10)
5/16" Lock Nut (2)
Hardware Bag Contents
Gate Opener (2)
Installation DVD (1)
Gate Bracket (2)
Post Pivot Bracket (2)
3/8" Bushings (2)
Customer Support Card (1)
Post Bracket (2)
Closed Position
Stop Plate (2)
2" Mounting Screw (6)
®
E-Z GATE OPENER
Transformer (1)
Warning Signs (4) Wire Harness (1)
Battery (1)
GTO Transmitter(2)
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
!
Control Box w/
Battery Box (1)
3/8" x 2-3/4" Bolt (4)

Mighty Mule FM462 Installation Instructions 5
Tools and Materials
Tools Needed:
• Power Drill
• Open End Wrenches — 1/2" and 9/16"
• Adjustable Wrench
•
3/8" Drill Bit
• Hacksaw or Heavy Duty Bolt Cutters
• Small Flat Bladed Screwdriver
• Large Phillips Screwdriver
• Tape Measure
• Level
• Wire Strippers
• C-Clamps — small, medium, and large
• Center Punch
• Hammer (for center punch)
• Extra person will be helpful
Materials You May Need for the Installation:
These items are NOT included with the gate opener kit. Some of these items can be purchased or special ordered
through your retailer. Please see page 26 or www.mightymule.com.
• Low voltage wire [RB509] will be needed to run from the transformer to the opener control board; length
depends upon the distance between the transformer power supply and the control box. (Page 14 & 26)
• If your gate is more than 1000' away from an AC power source you will need to use at least one 10 Watt solar
panel [FM123] or two 5 Watt panels (FM121) to charge the 12 Volt battery. (Page 2 & 26)
• PVC conduit for protecting wiring. (Page 6)
• Push-To-Open Brackets [FM148] are required if gates open out from property. (Page 3 & 26)
• Materials to reinforce thin walled tube or panel gates. (Page 7)
• 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. (Page 3 & 7)
• Some installations may require muffler clamps for the gate bracket. (Page 7)
• (2)16 AWG crimp on fork lugs (Page 15)
• Surge protection for transformer. (Page 16)
• Weather proof outlet is required if transformer is plugged into outside outlet. (Page 16)
• Some types of installations require U-Bolts for closed position stop plate. (Page 11)
• A low profile ground stop is required for dual gates when using the Mighty Mule gate lock. (Page 11)

6Mighty Mule FM462 Installation Instructions
If the gate post is larger than
6" the Post Pivot Bracket can
be removed and the center
hole of the Post
Bracket can be the
mounting point
for the gate
opener.
Center hole of
post bracket
Installation Overview for Pull-To-Open Gates
PUSH-TO-OPEN installation instructions begin on page 19.
Example of an installation on a chain link fence:
IMPORTANT: To achieve the most efficient
leverage for the gate opener and ensure long
trouble free service, the gate opener needs to
be installed within the following parameters.
The diagram at left shows the optimum
position for gate opener arm in relation to
the gate in the open and closed positions.
Be sure the position of the gate opener and
brackets allows for 1" of clearance between
the gate and the opener in both the open and
closed position, at the same time maintaining
a maximum distance of 13" from the end of the
retracted opener arm to the gate bracket with
the gate in the closed position.
36' power cable allows the control
board to control the SECOND
gate opener (run in PVC conduit)
You will need to trench across the
driveway in order to lay conduit for
the second opener power cable.
120 Volt indoor
Transformer
(surge protector
not supplied)
Fence Post
Set in Concrete
Run 1000' (max.) of low
voltage wire to control box
from transformer
(wire not included).
PVC conduit (not included)
to protect wire from lawn
mowers and weed eaters.
Gate Swings Evenly and Freely
Hung Firmly and Plumb
Control Box / Battery Box
First Opener Second Opener
Closed Position Stop Plates
Gate Bracket
1" minimum
Gate in the
OPEN POSITION
Pinch Area
Gate in the
CLOSED POSITION
Pinch Area
1" minimum
13" or less

Mighty Mule FM462 Installation Instructions 7
IMPORTANT: Determine which side of the driveway you will mount the control box. From this point on, the gate and
gate opener on the same side as the control box will be referred to as the FIRST gate and gate opener. The gate and
gate opener on the opposite side of the driveway from the control box will be referred to as the SECOND gate and gate
opener.
We recommend you position the opener near the centerline of the gate to keep the gate from twisting and flexing
and to avoid backsplash from rain water.
The Post Bracket Assembly
The position of the post bracket assembly
determines the leverage and efficiency of the
opener. The post bracket assembly position
also sets the clearance between the opener
and the gate in the open and closed positions.
The post bracket works well for
installations on round and square fence
posts. Because the post bracket carries the
entire thrust of the active opener, bolts must
completely penetrate the post.
On wood posts, place a metal plate or
washer (not supplied) between the nuts and
the post to prevent the thrust of the opener
from pulling the bolts and washers out of the
wood.
The post pivot bracket may not be necessary on posts larger than 6" in diameter (see page 6). Fence posts smaller
than 6" in diameter or 6" square should be made of metal instead of wood to remain stable while the opener is moving
the gate.
Reinforcing Gates for the Gate Brackets
We recommend using a muffler clamp, wood, or metal, to reinforce thin-walled tube gates, or wood to reinforce panel
gates as shown. These reinforcement methods will prevent damage to the opener and gate. Additional hardware may be
needed depending on the installation.
Muffler Clamp for
Gate Bracket
Wood or Metal
Reinforcement
1" x 6" Wood
Reinforcement
Post
Bracket
Post
Pivot Bracket
Metal Plate
Wooden Post
Post
Bracket
Post
Pivot Bracket
Metal Plate
Wooden Post
Post Pivot
Bracket
Post
Bracket
Post Bracket
Assembly
Thin Walled
Tube Gate
Gate Bracket
Muffler Clamp
(not supplied)
Gate Bracket
Wood or Metal
Reinforcement
(not supplied)
Gate
Bracket
Panel
Gate
1" x 6"
Wood
Reinforcement
Installation of the FIRST Gate Opener

8Mighty Mule FM462 Installation Instructions
Install Post Bracket Assembly and Gate Bracket
Step 1
Insert the 3/8" x 11/2" bolt through the center hole of the post brackets
and post pivot bracket. Secure with a 3/8" washer and 3/8" lock nut.
DO NOT overtighten the lock nut (the post pivot bracket will have to be
adjusted later).
Step 2
Attach post bracket assembly to the rear mount of the opener with a
clevis pin and a 3/8" washer. Secure the clevis pin with a hairpin clip.
Step 3
Attach gate bracket to the front mount of the opener with a clevis pin
and a 3/8" bushing. Secure the clevis pin with a hairpin clip.
Step 4
With the gate in the fully open position and the 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 post and gate.
3/8" x 11/2" Bolt
3/8" Lock Nut
Post Pivot Bracket
Post Bracket
Post Bracket Assembly
3/8" Washer
Clevis Pin
Hairpin Clip
Post Bracket Assembly
3/8” Washer
Rear Mount
Opener
Clevis
Pin
Hairpin Clip
Gate Bracket
Front Mount
Bushing
Fence Post
Gate in Open Position
Opener Arm Fully Retracted
LEVEL horizontal cross member
Post Bracket Assembly
Gate Bracket
Level Opener

Mighty Mule FM462 Installation Instructions 9
Step 5
Be sure the position of the gate opener and
brackets allows for 1" of clearance between
the gate and the opener in both the open
and closed position, while at the same time
maintaining a maximum distance of 13"
from the end of the retracted opener arm to
the gate bracket with the gate in the closed
position. This mounting position will give the
opener the most efficient leverage point for
operation and provides the least possible
pinch area
Step 6
After verifying that you have the best position
for the post pivot bracket in the open position,
insert the 5/16" x 11/2" 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. Again,
check the clearance and be sure that the gate
opener is not binding at the post pivot bracket.
If you don't have the required clearance, or if
the gate opener is binding on the post pivot
bracket, remove the 5/16" x 11/2" bolt and
readjust the post pivot bracket.
TIP: Turn the post pivot bracket over for more
hole alignment options. You can also move the
entire post bracket assembly to different positions on the post.
Step 7
When the post bracket assembly is in the optimum position, reattach the opener to the gate bracket (gate in the open
position); recheck the gate opener level; make sure the brackets are clamped securely.
Step 8
Mark reference points for bolt holes on the post through middle of post bracket assembly 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.
1" minimum
Gate in the
OPEN POSITION
Pinch Area
Gate in the
CLOSED POSITION
Pinch Area
1" minimum
13" or less
Be sure gate opener
and bracket don't bind.
5/16" x 11/2"
Bolt
Post Pivot
Bracket
Determine Best
Hole Alignment
to Achieve
1" Clearance
Post Bracket
5/16" Lock Nut
5/16" Washer
Post Bracket
Assembly
Mark fence post through
middle of bracket slots
and drill 3/8" holes through
post.
Gate In Open Position
Arm Fully Retracted
LEVEL horizontal cross member
Mark cross member through middle of gate
bracket slots and drill 3/8" holes through cross member.