Installation Manual
Installation Manual
FM402
WARNING!
This equipment is similar to other gate or door equipment and meets or exceeds Underwriters
Laboratory Standard 325 (UL 325). However, gate equipment has hazards associated with its
use and therefore by installing this product the installer and user accept full responsibility for
following and noting the installation and safety instructions. Failure to follow installation and safety
instructions can result in hazards developing due to improper assembly. You agree to properly
install this product and that if you fail to do so GTO Access Systems, LLC shall in no event be liable
for direct, indirect, incidental, special or consequential damages or loss of profits whether based
in contract tort or any other legal theory during the course of the warranty or at any time thereafter.
The installer and/or user agree to assume responsibility for all liability and use of this product
releasing 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 opener. This gate opener produces a high level of force. Stay clear of the
unit while it is operating and exercise caution at all times.
All automatic gate openers are intended for use on vehicular gates only.
This product meets and exceeds the requirements of UL 325, the standard which
regulates gate operator safety, by Underwriters Laboratories Inc.
For more information on Mighty Mule’s full line of Automatic Gate Openers and Access Controls visit our website at www.mightymule.com
GTO Sales: 800-543-4283 • Fax 850-575-8912
GTO Technical Service 800-453-1236
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 Openers and Access Controls visit www.mightymule.com
Printed in China for GTO Access Systems
Copyright© 2015 GTO Access Systems, LLC rev 12.14.15
U.L. Gate Operator Classifications
Residential Vehicular Gate Operator—Class I: A vehicular gate operator (or system) intended for use in a home of
one-to-four single family dwelling, or a garage or parking area associated therewith.
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 multifamily housing unit (five or more single family units), hotel,
garages, retail store, or other building servicing the general public.
Industrial/Limited Access Vehicular Gate 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 intended to service the
general public.
Restricted Access Vehicular Gate Operator–Class IV: A vehicular gate operator (or system) intended for use in a
guarded industrial location or building such as an airport security area or other restricted access locations not servicing
the general public, in which unauthorized access is prevented via supervision by security personnel.
Product Usage
The Mighty Mule Gate Opener 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.
The Mighty Mule Gate Opener system certified to be in compliance with the following safety standards (current edition as
of publication date):
Product in compliance with the latest UL-325 and UL-991 safety standards by ETL.
Converting Metric Units to English Equivalents
When You Know
Multiply By
To Find
Symbol
centimeters
meters
kilograms
0.3937
3.2808
2.2046
inches
feet
pounds
in. (or ")
ft. (or ')
lb. (or #)
Converting English Units to Metric Equivalents
When You Know
Multiply By
inches
feet
pounds
2.5400 centimeterscm
0.3048meters m
0.4535 kilogramskg
Converting Temperature
deg. Celsius
deg. Fahrenheit
(°C x 1.8) + 32
(°F-32) ÷ 1.8
To Find
deg. Fahrenheit
deg. Celsius
Symbol
°F
°C
FOR YOUR RECORDS
Please record the following information product serial number (located on the rear of opener arm), be sure to
keep all receipts for proof of purchase. Refer to this information when calling GTO for service or assistance
with your automatic gate opener.
Serial Number:____________________________________
Date of Purchase:_________________
Place of Purchase:____________________________________________________________________
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
rev 12-14-15
Mighty Mule FM402 Installation Instructions
i
PLEASE READ THIS FIRST
Thank you for purchasing a Mighty Mule FM402 Gate Opener—GTO’s “do-it-yourself” automatic gate opener!
When correctly installed and properly used, your Mighty Mule Gate Opener will give you many years of reliable
service. Please read the following information and watch the enclosed video to ensure you have the correct
system for your particular needs. Furthermore, this manual and the video will enable you to properly install
your Mighty Mule Gate Opener.
The Mighty Mule Gate Opener is designed for installation on Pull-To-Open dual gate leaves (gates that
open into the property). By purchasing accessory brackets [FM148], the Mighty Mule Gate Opener can
accommodate Push-To-Open dual gate leaves (gates that open out from the property). Please see Pull-ToOpen/Push-To-Open diagram on page 3. The gates must not exceed 12 ft. or 300 lbs. per leaf (see Technical
Specifications on page 1). The Mighty Mule Gate Opener can be used on vinyl, aluminum, chain link, farm
tube, and wrought iron gates.
Use on solid (surface) gates is not recommended. Solid surface gates have a high resistance
to the wind. If the wind is strong enough, the opener will obstruct and stop, blow fuses, or
may damage the equipment.
The Mighty Mule Gate Opener features an adjustable stall force setting. This safety feature makes the gate
stop and reverse direction within 2 seconds when it comes in contact with an obstruction. The MIN setting
means the gate will exert the minimum force on an obstruction before it stops and reverses direction. You will
need to adjust the stall force for your particular application.
The Mighty Mule Gate Opener also has an adjustable auto-close feature. After the gate reaches the fully
open position, it can be set for OFF, or to remain open up from 3 to 120 seconds before automatically closing.
Pressing the transmitter button at any time after the gate opens fully will cause it to close immediately. The
auto-close factory setting is OFF, meaning the gate will stay open until you press the transmitter (or keypad,
etc.) again.
The Mighty Mule Gate Opener accommodates extra transmitters, digital keypads, solar panels, push buttons,
automatic gate locks, and other access control products. These optional accessories (page 26) are available
Special Order (if the accessory is not in stock). If your store cannot special order accessories, please call the
GTO Sales Department (850/575-0176) or visit www.mightymule.com.
PLEASE NOTE—If your application requires any of the following:
Column Mounting
Slide gates
Swing gates longer than 12 feet or weighing more than 300 pounds
Professional installation
please call GTO at 800-543-4283 for information about our GTO/ACCESS SYSTEMS professional line
of gate openers and accessories. Our Sales Department will be glad to give you the name and phone
number of a GTO/ACCESS SYSTEMS dealer near you.
BEFORE YOU BEGIN TO INSTALL YOUR AUTOMATIC GATE OPENER:
Read these instructions carefully and completely to become familiar with all parts and installation steps.
The video is only designed as an overview of the installation procedure. You must read the installation
manual for detailed instructions on gate opener safety and proper use of the gate opener.
ii Mighty Mule FM402 Installation Instructions
rev 12-14-15
IMPORTANT SAFETY INSTRUCTIONS
Because automatic gate openers produce high levels of force, consumers need to know the potential
hazards associated with improperly designed, installed, and maintained automated gate opener
systems. Keep in mind that the gate opener is just one component of the total gate operating system.
Each component must work in unison to provide the consumer with convenience, security, and
safety.
This manual contains various safety precautions and warnings for the consumer. Because there are
many possible applications of the gate opener, the safety precautions and warnings contained in this
manual cannot be completely exhaustive in nature. They do, however, provide an overview of the
safe design, installation, and use of this product. CAREFULLY READ AND FOLLOW ALL SAFETY
PRECAUTIONS, WARNINGS, AND INSTALLATION INSTRUCTIONS TO ENSURE THE SAFE
SYSTEM DESIGN, INSTALLATION, AND USE OF THIS PRODUCT.
warning symbol. The symbol
Precautions and warnings in this manual are identified with this
identifies conditions that can result in damage to the opener or its components, serious injury, or
death.
Because GTO automatic gate openers are only part of the total gate operating system, it is the
responsibility of the consumer to ensure that the total system is safe for its intended use.
How To Manually Open and Close the Gate:
CAUTION: The gate can be opened and closed manually when the opener is disconnected.
ONLY disconnect the opener when the opener power switch is OFF and the gate is NOT moving.
Disconnecting the Opener
1. Turn opener power switch (Control Box) OFF.
2. Remove hairpin clip, clevis pin, and bushing from both
the front and rear mounting points.
3. Remove the opener from the mount.
IMPORTANT: NEVER allow opener arm to hang
by the front or rear mount — it will break from
the arm weight.
Front Mount
Clevis
Pin
Bushing
Gate Bracket
Hairpin Clip
CAUTION: Because the Mighty Mule gate opener is battery powered, disconnect the opener ONLY
when the power switch on the contol box is turned OFF. Unplugging the transformer does not turn power to
the opener OFF.
NOTE: Substitute a Pin Lock [FM133] for the clevis pin on the front
mount of the gate opener to prevent unauthorized removal of the opener
from the gate (page 26). rev 12-14-15
Mighty Mule FM402 Installation Instructions
iii
IMPORTANT SAFETY INSTRUCTIONS
For The Consumer
WARNING: To reduce the risk of injury or death:
1.
READ AND FOLLOW ALL INSTRUCTIONS. Failure to meet the requirements set forth in the instruction manual
could cause severe injury or death, for which the manufacturer cannot be held responsible.
2. When designing a system that will be entered from a highway or main thoroughfare, make sure the system is
placed far enough from the road to prevent traffic congestion.
3. The gate must be installed in a location that provides adequate clearance between it and adjacent structures when
opening and closing to reduce the risk of entrapment. Swinging gates must not open into public access areas.
4. The gate and gate opener installation must comply with any applicable local codes.
I. Before Installation
1. Verify this opener is proper for the type and size of gate, its frequency of use, and the proper class rating.
2. Make sure the gate has been properly installed and swings freely in both directions. Repair or replace all worn
or damaged gate hardware prior to installation. A freely moving gate will require less force to operate and will
enhance the performance of the opener and safety devices used with the system.
3. Review the operation of the system to become familiar with its safety features. Understand how to disconnect the
opener for manual gate operation (page iii).
4. This gate opener is intended for vehicular gates ONLY. A separate entrance or gate must be installed for
pedestrian use (page vi).
5. Always keep people and objects away from the gate and its area of travel. NO ONE SHOULD CROSS THE
PATH OF A MOVING GATE.
6. Pay close attention to the diagram below and be aware of these areas at all times.
ZONE 1
ZONE 2
ZONE 2
ZONE 5
ZONE 3
ZONE 3
ZONE 4
Driveway
Gate in the
Open Position
ZONE 5
ZONE 4
Gate in the
Open Position
Entrapment Zones for a proper Pull-To-Open installation:
Zone 1 – leading edge of the gates.
Zone 2 – between the gate and the gate post.
Zone 3 – the path of the gate.
Zone 4 – the space between the gate in the open position and any object such as a wall, fence, etc.
Zone 5 – pinch points between the opener and gate.
iv Mighty Mule FM402 Installation Instructions
rev 12-14-15
IMPORTANT SAFETY INSTRUCTIONS
II. During Installation
1. Install the gate opener on the inside of the property and fence line. DO NOT install an opener on the outside of the
gate where the public has access to it.
2. Be careful with moving parts and avoid close proximity to areas where fingers or hands could be pinched.
3. Devices such as contact sensors (safety edges) and non contact sensors (photo beams) provide additional
protection against entrapment.
4. If push buttons or keypads are installed, they should be within sight of the gate, yet located at least 10 feet from
any moving part of the gate (see diagram below). Never install any control device where a user will be
tempted to reach through the gate to activate the gate opener.
5. Do not activate your gate opener unless you can see it and can determine that its area of travel is clear of people,
pets, or other obstructions. Watch the gate through its entire movement.
6. Secure outdoor or easily accessed gate opener controls in order to prohibit unauthorized use of the gate.
10'
10'
10'
Moving Gate
Area
10'
Moving Gate
Area
Driveway
10'
NEVER INSTALL
any control device
within gray area
10'
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
become damaged, illegible or missing, replace them immediately. Contact GTO for free replacements.
2. The gate is automatic and could move at any time, posing a serious risk of entrapment. No one should be in
contact with an activated gate when it is moving or stationary.
3. Do not attempt to drive into the gate area while the gate is moving; wait until the gate comes to a complete stop.
4. Do not attempt to “beat the gate” (drive through) while the gate is closing. This is extremely dangerous.
5. Do not allow children or pets near your gate. Never let children operate or play with gate controls. Keep ALL
gate controls away from children and unauthorized users; store controls where children and unauthorized users do
not have access to them.
6.
KEEP GATE AND GATE OPENER PROPERLY MAINTAINED. Always turn power to opener OFF before
performing any maintenance. Regularly grease the gate hinges. Clean the push-pull tube with a soft, dry cloth and
apply silicone spray to it at least once per month.
rev 12-14-15
Mighty Mule FM402 Installation Instructions
v
IMPORTANT SAFETY INSTRUCTIONS
7. To operate this equipment safely, YOU must know how to disconnect the opener for manual gate operation (page
iii). If you have read the instructions and still do not understand how to disconnect the opener, contact the GTO
Service Department.
8. Disconnect the opener ONLY when the power is TURNED OFF and the gate is NOT moving.
9. Make arrangements with local fire and law enforcement for emergency access.
10. Distribute and discuss copies of the IMPORTANT SAFETY INSTRUCTIONS section of this manual with all
persons authorized to use your gate.
11.IMPORTANT: Save these safety instructions. Make sure everyone who is using or will be around the gate
and gate opener are aware of the dangers associated with automated gates. In the event you sell the
property with the gate opener or sell the gate opener, provide a copy of these safety instructions to the
new owner.
Should you lose or misplace this manual, a copy can be obtained by downloading one from the Mighty
Mule web site (www.mightymule.com), by contacting GTO Access Systems, LLC., at 3121 Hartsfield Road,
Tallahassee, Florida 32303 or by calling 1-800-543-4283 and requesting a duplicate copy. One will be provided
to you free of charge.
Required Safety Precautions for Gates
Install Warning Signs
Warning signs alert people of automatic gate operation and are required when installing the Mighty Mule Gate Opener.
The Warning Signs included must be installed on both sides of each gate. Furthermore, a walk-through gate must be
installed if pedestrian traffic is expected near the vehicular gate. We recommend using the GTO Bulldog Pedestrian Gate
Lock [FM145] (page 26) for controlled access.
Entrapment Protection
GTO’s inherent obstruction settings, even when properly adjusted, may not be sensitive enough to prevent bodily
injury in some circumstances. For this reason, safety devices such as safety edge sensors (or photoelectric sensors),
which stop and reverse gate direction upon sensing an obstruction, are suggested for enhanced protection against
entrapment.
Bulldog Pedestrian
Gate Lock
(recommended, not included)
Warning Sign
Pedestrian Gate
Contact Sensor
(recommended, not included)
Vehicular Gate
Photo Beam
Contact Sensor
(recommended, not included)
vi Mighty Mule FM402 Installation Instructions
Warning Sign
Vehicular Gate
Contact Sensor
(recommended, not included)
Contact Sensor
(recommended, not included)
Photo Beam
rev 12-14-15
IMPORTANT SAFETY INSTRUCTIONS
Secondary Means of Protection Against Entrapment
As specified by Gate Opener Safety Standard, UL 325 (30A.1.1), automatic gate openers shall have an inherent
entrapment sensing system, and shall have provisions for, or be supplied with, at least one independent secondary
means to protect against entrapment. The Mighty Mule utilizes Type A, an inherent (i.e., built-in) entrapment sensing
system as the primary type of entrapment protection. Also, the Mighty Mule has provisions for the connection of Type
B2 protection to be used as the secondary type of entrapment protection, if desired.
1. For gate openers utilizing a contact sensor (e.g., safety edge sensor– Type B2) in accordance with UL 325 (51.8.4
[i]):
A. One or more contact sensors shall be located at the leading edge, bottom edge, and post edge, both inside and
outside of a vehicular swing gate system.
B. A hard wired contact sensor shall be located and its wiring arranged so that the communication between the
sensor and the gate opener is not subjected to mechanical damage.
C. A wireless contact sensor such as one that transmits radio frequency (RF) signals to the gate opener for
entrapment protection functions shall be located where the transmission of the signals are not obstructed or
impeded by building structures, natural landscaping or similar obstruction. A wireless contact sensor shall
function under the intended end-use conditions.
You may want to consider adding photo beams to your installation. GTO Photo Beams [R4222] provide a “non contact”
means of entrapment protection. Call Mightgy Mule Sales at 1-800-543-GATE (4283) for more information.
Leading Edge Contact Sensor
on both sides of the gate
Photo Beam
Post Edge Contact Sensor
on both sides of the gate
Bottom Edge Contact Sensor
on both sides of the gate
Post Edge Contact Sensor
on both sides of the gate
Photo Beam
ENTRAPMENT ALARM (UL 325; 30A.1.1A)
The Mighty Mule Gate Opener is designed to stop and reverse within 2 seconds when the gate comes
in contact with an obstruction. Additionally, these openers are equipped with an audio entrapment
alarm which will activate if the unit obstructs twice while opening or closing. This alarm will sound for a
period of 5 minutes, or until the opener receives an intended signal from a hard wired entry/exit source
(e.g. push button control or keypad) and the gate returns to a fully open or fully closed position. Turning
the power switch on the control box OFF and back ON will also deactivate the alarm. Wireless controls
such as transmitters and wireless keypads will not deactivate the alarm.
rev 12-14-15
Mighty Mule FM402 Installation Instructions
vii
IMPORTANT SAFETY INSTRUCTIONS
!
GTO DC SWING SERIES
Conforms to UL325
5th Edition Standards
9901178
XXXXXX
Serial No.
MM402-0000000
GTO Access Systeems, LLC - Tallahassee, Florida USA
Warning signs (4 enclosed) to be installed on both sides
of each gate (3–5 feet above the bottom of the gate)
Product identification label (2)
installed under rear mount of each arm
402
www.mightymule.com
DUAL GATE OPENER
1-800-543-GATE (4283)
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.
Control box label (1)
installed on front of the 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.
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
Logo and warning labels (4)
installed on each side of opener housings
viii Mighty Mule FM402 Installation Instructions
rev 12-14-15
Technical Specifications
MIGHTY MULE FM402 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.
Mighty Mule FM402 Gate Capacity/Cycle Chart
An operation cycle is
one full opening and
closing of the gate.
Gate Weight
Estimated number of daily cycles, based on use with a transformer.
300 lbs.
150 lbs.
100 lbs.
50 lbs.
Number of Cycles Per Day
39
36
34
41
39
36
44
41
39
46
44
42
5' - 6'
8'
10'
Gate Length
31
34
36
39
12'
* These specifications are subject
to change without notice.
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.
rev 12-14-15
Mighty Mule FM402 Installation Instructions
1
Before You Begin
1. Determine Charging Options for Battery: Transformer OR Solar
NEVER USE TRANSFORMER AND SOLAR PANEL(S) AT THE SAME TIME!
It will damage the control board!
IMPORTANT
• The 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.
Dual Gate
Winter Ratings
Zone 1
8
16
26
15 Watts
11
20
30
20 Watts
14
28
38
NOTE: UP to 250 ft. of dual conductor, 16
guage, stranded wire may be used to allow
installation of solar panels in direct sunlight.
Zone 3
Zone 1
Zone 2
Zone 3
Zone 3
2 Mighty Mule FM402 Installation Instructions
Zone 3
10 Watts
Accessories connected to your system
will draw additional power from the
battery and will require additional solar
panels.
See page 26:
10 Watt Solar Panel [FM123]
5 Watt Solar Panel [FM121]
Zone 2
Zone 3
rev 12-14-15
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.
Your Property
Your Property
Push-To-Open
Pull-To-Open
(arm
extends to open)
(arm retracts to open)
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).
Horizontal Cross Member
A
E
F
B
C
Vertical Cross Member
A – Level
B – Plumb
C – Free Swinging
rev 12-14-15
D – Posts Secured in Concrete
E – Centerline Mounting
F – Good Working Hinges
D
Mighty Mule FM402 Installation Instructions
3
Parts List – Opener and Mounting Hardware
! WARNING
Installation DVD (1)
Battery (1)
Moving Gate Can Cause
Injury Or Death
Transformer (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.
Control Box w/
Battery Box (1)
Warning Signs (4)
Wire Harness (1)
Gate Bracket (2)
Gate Opener (2)
®
8" Nylon Cable Tie (14)
Closed Position
Stop Plate (2)
E
E-Z GAT
Post Bracket (2)
Post Pivot Bracket (2)
NER
OPE
Customer Support Card (1)
Hardware Bag Contents
3/8" x 8" Bolt (4)
3/8" Washer (12)
3/8" x 2-3/4" Bolt (4)
5/16" Washer (2)
3/8" x 1-1/2" Bolt (2)
3/8" Lock Nut (10)
3/8" x 1-1/2" Clevis Pin (4)
Hairpin Clip (4)
4 Mighty Mule FM402 Installation Instructions
2" Mounting Screw (6)
5/16" x 1-1/2" Bolt (2)
5/16" Lock Nut (2)
3/8" Bushings (2)
rev 12-14-15
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)
rev 12-14-15
Mighty Mule FM402 Installation Instructions
5
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:
Control Box / Battery Box
120 Volt indoor
Transformer
Gate Swings Evenly and Freely
Hung Firmly and Plumb
First Opener
Second Opener
(surge protector
not supplied)
Gate Bracket
Closed Position Stop Plates
Run 1000' (max.) of low
voltage wire to control box
from transformer
(wire not included).
1" minimum
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.
Gate in the
CLOSED POSITION
Pinch Area
13" or less
Pinch Area
Fence Post
Set in Concrete
PVC conduit (not included)
to protect wire from lawn
mowers and weed eaters.
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.
Gate in the
OPEN POSITION
1" minimum
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
6 Mighty Mule FM402 Installation Instructions
rev 12-14-15
Installation of the FIRST Gate Opener
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
Wooden Post Metal Plate
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.
Post
Pivot Bracket
Post
Pivot Bracket
Metal Plate
Post Pivot
Bracket
Post
Bracket
Post
Bracket
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.
Wooden Post
Post
Bracket
Post Bracket
Assembly
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
(not supplied)
Gate Bracket
Muffler Clamp for
Gate Bracket
Thin Walled
Tube Gate
1" x 6" Wood
Reinforcement
Wood or Metal
Reinforcement
Gate Bracket
Wood or Metal
Reinforcement
(not supplied)
Gate
Bracket
Panel
Gate
1" x 6"
Wood
Reinforcement
rev 12-14-15
Mighty Mule FM402 Installation Instructions
7
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.
Clevis Pin
Rear Mount
3/8” Washer
Post Bracket Assembly
Install Post Bracket Assembly and Gate Bracket
3/8"
x 11/2" Bolt
Post Pivot Bracket
Post Bracket
3/8"
Washer
3/8"
Lock Nut
Opener
Hairpin Clip
Post Bracket Assembly
Front Mount
Step 3
Clevis
Pin
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.
Bushing
Gate Bracket
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.
Post Bracket Assembly
Gate in Open Position
Opener Arm Fully Retracted
Level Opener
LEVEL ho
rizontal c
ross mem
ber
Gate Bracket
Fence Post
8 Mighty Mule FM402 Installation Instructions
rev 12-14-15
Step 5
Gate in the
CLOSED POSITION
1" minimum
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.
Pinch Area
13" or less
Be sure gate opener
and bracket don't bind.
Pinch Area
Gate in the
OPEN POSITION
1" minimum
Determine Best
Hole Alignment
to Achieve
1" Clearance
5/16" x 11/2"
Bolt
Post Pivot
Bracket
Post Bracket
5/16" Washer
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.
5/16"
Lock Nut
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.
Mark fence post through
middle of bracket slots
and drill 3/8" holes through
post.
Post Bracket
Assembly
Gate In Open Position
Arm Fully Retracted
LEVEL h
orizontal
cross me
mber
Mark cross member through middle of gate
bracket slots and drill 3/8" holes through cross member.
rev 12-14-15
Mighty Mule FM402 Installation Instructions
9
Step 9
Drill 3/8" holes through post as marked. Fasten post bracket assembly
to the fence post using two 3/8" x 8" bolts, washers and lock nuts. You
EXAMPLES
TOP VIEW
Gate Bracket
Mounting
Examples
must use bolts that completely penetrate the post.
Round Metal Post
Step 10
Drill 3/8" holes through the gate cross member as marked. Mount gate
bracket using two 3/8" x 2 3/4" bolts, washers, and lock nuts.
Square Metal Post
SIDE VIEW
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.
Square Wood Post
Remove excess bolt length
with hacksaw or bolt cutters
Round Wood Post
Gate Bracket Mounting Examples
FRONT VIEW
SIDE VIEW
SIDE VIEW
FRONT VIEW
Mounting Plate
Created for
Decorative Gate
(required but not
supplied)
Round Tube & Chain Link Gate
Remove excess bolt length
with hacksaw or bolt cutters
Square Tube Gate
Attach Opener Arm
Step 1
Attach the opener
to the securely
bolted post bracket
assembly and gate
bracket using clevis
pins, bushings,
and hairpin clips, or
optional Pin Lock
[FM133] (page
26). Verify that the
opener is level and
adjust the post
bracket assembly, if
necessary.
Post Bracket Assembly
bolted to fence post
Level Opener
LEVEL ho
rizontal c
ross mem
ber
Gate Bracket bolted
to gate cross member
Clevis Pin, Washer, and Hairpin Clip
Fence Post
Gate In Open Position
Clevis Pin, Bushing, and Hairpin Clip
Step 2
Install the SECOND gate opener and hardware on the second gate following the same procedures as the FIRST gate
opener and hardware ("Installing Post Bracket Assembly and Gate Bracket" Steps 1–10).
NOTE: The power cable for the Second Opener should be run in PVC conduit under the driveway to protect it from
damage due to lawnmowers, heavy equipment, etc. (See illustration on page 6.) NEVER SPLICE opener arm power
cables. This will cause performance problems and may damage the opener.
10 Mighty Mule FM402 Installation Instructions
rev 12-14-15
Install the Closed Position Stop Plates
The closed position stop plate is attached to the FIRST gate to help stabilize the gate leaf in the closed position. An
optional low profile ground stop, when used with the closed position stop plate, provides a secure point for the SECOND
gate to close against.
To further enhance the stability and security of your gate, install a Mighty Mule Automatic Gate Lock [FM143] page 26).If
you will be using the Mighty Mule Gate Lock with your gate opener system, the closed position ground stop is required.
For Pull-to-Open systems, install the closed position stop plates on the inside of the gates.
Optional Ground Stop
(beneath gate)
FIRST GATE
CONTROL BOX
SECOND GATE
Closed Position
Stop Plates
For Push-to-Open systems, install the closed position stop plates on the outside of the gates.
Step 1
Detach the gate opener arms from the gates and move the gates to the
closed position.
Step 2
Closed Position Stop Plate mounted
horizontally on metal post with U-bolts.
FACING VIEW
Using appropriate hardware for your type of gate (U-bolts for tube or
chain link; screw or bolts for wood or metal) attach the closed position
stop plate (horizontally) about mid-height on the FIRST gate frame. Do
not tighten it completely at this time. Slide the stop plate toward the
frame of the SECOND gate leaf until they touch. Once you have moved
the stop plate to the correct position, tighten its hardware completely.
FIRST Gate Frame
SECOND Gate Frame
OVERHEAD VIEW
Step 3
The low profile ground stop may be made
of metal or concrete and should be firmly
secured in the ground. The low profile ground
stop should be installed beneath the SECOND
gate, positioned near the leading edge.
Post Bracket Assembly
Gate Bracket
Closed Position
Stop Plates
rev 12-14-15
Low Profile Ground Stop
(not included)
Mighty Mule FM402 Installation Instructions
11
Step 4
Closed Position Stop Plate mounted
on the SECOND GATE
Mount Vertically
Using appropriate hardware for your type of gate, attach the vertical
closed position stop plate to the SECOND gate frame at the point
where it will come in contact with the low profile ground stop. Do not
tighten it completely at this time. You must slide the closed position
stop plate toward the low profile ground stop until they touch. Once
you have moved the stop plate to the correct position, tighten its
hardware completely.
SIDE VIEW
Closed Position Stop Plate
Low Profile Ground Stop
in Near the Center of Driveway
FACING VIEW
Step 5
Return the gates to their open positions and
reattach the gate openers to the gates.
Low Profile Ground Stop
Closed Position
Stop Plate
Closed Position
Stop Plate
Mount the Battery Box and Control Box
Step 1
Remove the Control box from the Battery Box
by removing the three screws as shown in
Illustration A.
Battery Box
Illustration A
Screw Placement Guides
Step 2
Mount the Battery Box using the screws
(provided) or another secure mounting method.
The battery/control box must be mounted at
least 3 feet above the ground to protect it from
rain splash, snow, etc., and at least 3 feet
from an AC power source to prevent electrical
interference.
Step 3
Control Box
Control Box
Slide the battery into position with the terminals at
the TOP (see Illustration B).
!W
AR
Piece of Wood
for Mounting
NI
NG
Mov
ing
InjuGate
1.
ry Can
KEE
Or
P CLE
2.
AR
Do
DeaCau
! Ga
not
th
3.
se
pla
y in allow te ma
y mo
gat chi
Thi
e are ldr
ve
s
en
at
mu gate
a.
to
st use is
ope any
for
tim
rat
a sep veh
e gat e.
ara icles
e or
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Illustration B
12 Mighty Mule FM402 Installation Instructions
rev 12-14-15
Connecting the Battery
Step 4
Verify that the ON/OFF switch is in the OFF position.
Battery
Connect the BATTERY WIRE HARNESS wires to the
battery --- RED wires to POSITIVE (+) battery terminal
and BLACK wires to NEGATIVE (–) battery terminal.
The BATTERY WIRES from the CONTROL BOARD
should extend through the KNOCK-OUT in the back
of the CONTROL BOX. Plug the BATTERY HARNESS
wires into the wires coming from the CONTROL BOX.
Battery Wire Harness
with In-Line Fuse
Step 5
Back of
Control Box
Battery Box
Tuck the excess battery leads into the battery box and
reattach the CONTROL BOX to the BATTERY BOX.
Control Box
Remove the Control Box Cover
Step 6
Control Board
Remove the four (4) control box cover screws and remove
the cover to access the CONTROL BOARD.
Step 7
Attach antenna to control
box cover. First, remove the
Phillips screw (labeled ANT)
from the control box cover.
Place one end of the antenna
coil over the antenna plug
(antenna wire will fit into
groove). Tighten the Phillips
screw to secure antenna.
rev 12-14-15
Control Box Cover
Mighty Mule FM402 Installation Instructions
13
Connect Opener Power Cables
Step 1
STATUS
1st OPR.
Bring FIRST power cable into the control box through a strain relief slot,
leaving enough wire to reach the FIRST OPR. terminal block.
OPEN < JOG > CLOSE
2nd OPR.
PWR.
Insert the individual power cable wires into appropriate terminals on the
FIRST OPR. terminal block (white to WHT; green to GRN; red to RED;
black to BLK). Tighten the set screws. A dab of petroleum jelly on each
terminal will help prevent corrosion.
MIN
MAX OFF
STALL FORCE
SET
LIMIT
120
SEC.
AUTO CLOSE
REMOVE JUMPER FOR
PUSH TO OPEN OPTION
SFTY.
VAR1
EXIT
JP1
VAR2
CYCLE
VAR3
EDGE
SENSOR
VAR4
COMMON
VAR5
LOCK+
LOCK–
PF1
K1
WHT
FIRST OPR.
Step 2
GRN
BLK
Pull the 36' second opener power cable through the PVC conduit and
secure in the driveway slot/trench (see pages 6 and 14).
BATT +
SECOND OPR.
WHT
K3
GRN
RED
K4
BLK
14 VAC
OR
SOLAR
Step 3
BATT –
R4722
GTO Inc. Ta l l a h a s s e e , F L
K2
RED
VAR6
Insert the SECOND power cable into a strain relief slot at the bottom
of the control box, leaving enough wire to reach the SECOND OPR.
terminal block.
Insert the individual power cable wires into appropriate terminals on
the SECOND OPR. terminal block (white to WHT; green to GRN; red to
RED; black to BLK). Tighten the set screws.
Correct
Wire Terminal
Block
ON OFF
FIRST Opener
Power Cable
SECOND Opener
Power Cable
Wrong
Wrong
Screwed into
wire insulation.
Exposed strands
of wire.
Strain Relief Slots
(Battery Wires Not Shown)
Connect the Transformer (*Solar Instructions on Page 21)
NEVER USE TRANSFORMER AND SOLAR PANEL(S) AT THE SAME TIME!
IMPORTANT INFORMATION ABOUT LOW VOLTAGE WIRE:
• The only wire acceptable for use with GTO products is 16 gauge stranded, low voltage, direct burial wire. This
particular gauge enables the transformer to provide an adequate charge through the control board to the battery
at distances up to 1000'.
• DO NOT use telephone wire or solid core wire. Unlike stranded wire, these types of wire are inadequate for use
with your gate opener system.
• NEVER splice wires together. Splicing permits corrosion and seriously degrades the wire's ability to carry an
adequate current.
Step 1
Make sure the power switch is OFF.
Step 2
Select the electrical outlet where you will plug the transformer. Measure
the distance from this outlet to the control box following the path
where the wire will be laid. After you have measured how much wire is
needed, cut the wire to the appropriate length (up to 1000').
14 Mighty Mule FM402 Installation Instructions
ON/OFF
Switch
ON/OFF
rev 12-14-15
Step 3
Control and Battery Box
First Gate Opener
120 Volt indoor
Transformer
Lay the measured length of low voltage wire
in a trench following a path from the selected
electrical outlet to the control box. Wires coming
up from the ground should be run through PVC
conduit to protect them from lawn mower blades,
weedeaters, and grazing animals. Be sure to
bury the wire laid in the trench.
(surge protector
not supplied)
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.
STATUS
1st OPR.
OPEN < JOG > CLOSE
2nd OPR.
PWR.
MIN
MAX OFF
STALL FORCE
SET
LIMIT
120
SEC.
AUTO CLOSE
REMOVE JUMPER FOR
PUSH TO OPEN OPTION
SFTY.
VAR1
EXIT
JP1
VAR2
Step 4
CYCLE
VAR3
EDGE
SENSOR
VAR5
LOCK+
LOCK–
PF1
K1
WHT
FIRST OPR.
Bring enough wire up through the PVC conduit to reach the control
board.
VAR4
COMMON
GRN
RED
R4722
GTO Inc. Ta l l a h a s s e e , F L
Step 5
K2
BLK
BATT +
Insert one transformer wire into a 14VAC OR SOLAR terminal. Insert the
other transformer wire into the remaining 14VAC OR SOLAR terminal.
The transformer wires can be connected to the 14VAC OR SOLAR
terminals regardless of color/polarity.
Tighten set screws against exposed end of wires.
SECOND OPR.
Strip 3/16" off the ends of the low voltage wire and twist tightly. Attach
these ends to the 14VAC OR SOLAR terminals located on the terminal
block). Be certain not to let the exposed wires touch each other!
WHT
K3
BATT –
GRN
RED
K4
BLK
14 VAC
OR
SOLAR
VAR6
ON OFF
Low Voltage Wire from
Transformer or Solar
BATT +
SECOND OPR.
WHT
Step 6
GRN
At the AC outlet, strip 1/2" of insulation from the ends of the low voltage
wire. Attach these stripped ends to the transformer terminals. We
suggest adding crimp on fork lugs to the end of each wire before
attaching it to the transformer.
rev 12-14-15
RED
K4
BLK
14 VAC
OR
SOLAR
Make sure the exposed wires do not
touch each other!
K3
Low Voltage Wire
from Transformer
or Solar Panel
VAR6
ON OFF
Mighty Mule FM402 Installation Instructions
15
Step 7
Plug the transformer into the electrical outlet. Use of a surge protector
with the transformer is strongly recommended. If electrical outlet is
located outdoors, outlet and transformer should be protected by a
weatherproof cover.
SURGE PROTECTOR
Transformer
Set the CLOSED Position Limit for PULL-TO-OPEN Installation
Your transmitter must be able to operate the gate. If not, see "Personalize Your Transmitter Setting" on page 18.
Note: The OPEN limit is when the opener is fully retracted and the gate is in the full open position. The open limit setting
can only be adjusted by moving the gate bracket. To achieve the optimum closed position, you must adjust the CLOSED
limit setting:
Step 1
Make sure the Control Box is ON and that
the gate is in the OPEN POSITION (arms fully
retracted).
Step 2
Press and HOLD the 2nd Opener CLOSE
button on the control board and be prepared
to RELEASE the button when the gate reaches
the desired closed position/limit. Use the JOG
OPEN and CLOSE buttons to "fine tune" the
gate position if neccessary.
FIRST Opener
JOG Buttons
SECOND Opener
JOG Buttons
STATUS
1st OPR.
OPEN < JOG > CLOSE
2nd OPR.
PWR.
SET LIMIT Button
SET
LIMIT
MIN
MAX OFF
STALL FORCE
120
SEC.
AUTO CLOSE
REMOVE JUMPER FOR
PUSH TO OPEN OPTION
SET LIMIT Light
Step 3
Press and HOLD the 1st Opener CLOSE button
on the control board and be prepared to RELEASE the button when the gate reaches the desired closed position/limit.
Use the JOG OPEN and CLOSE buttons to "fine tune" the gate position if neccessary.
Step 4
With the gates in in the desired closed positions PRESS and HOLD the SET LIMIT button until the alarm and RED Light
come on. Then release the button.
NOTE: The opener must be extended more than 7 inches to set limits.
Step 5
NOTE: When the control box cover is removed the receiver range is reduced to less than 5 feet.
Press the transmitter button once (within 5 feet of the control board) and allow the gates to fully open. The alarm will beep
once when both gates reach the OPEN LIMIT. This indicates the limits for both arms are programmed in memory.
Step 6
Press the transmitter button and allow the gates to fully close to verify that they stop at the desired positions. Repeat
Steps 2-5 if correction is needed.
16 Mighty Mule FM402 Installation Instructions
rev 12-14-15
Adjust the Stall Force Setting
The Stall Force potentiometer controls the the amount of force the
opener will apply against an obstruction before it stops and reverses
direction within two seconds.
IMPORTANT: The Stall Force setting will need to be adjusted to
compensate for the weight and size of your gates. For safety reasons,
use the lowest possible setting to operate the gate.
The Stall Force potentiometer on the control board operates like a
volume control on a radio. Use a small flat blade screwdriver to turn the
arrow in the center of the potentiometer. Adjust the sensitivity from the
MINIMUM position just to the point where the gates operate smoothly
without obstructing from their own weight or wind conditions.
STATUS
1st OPR.
OPEN < JOG > CLOSE
2nd OPR.
PWR.
MIN
MIN
MAX OFF
STALL FORCE
SET
LIMIT
120
SEC.
AUTO CLOSE
REMOVE JUMPER FOR
PUSH TO OPEN OPTION
MAX
SFTY.
STALL FORCE
JP1
VAR1
EXIT
VAR2
CYCLE
VAR3
EDGE
SENSOR
VAR4
COMMON
VAR5
LOCK+
NOTE: You may need to increase the stall force in cold weather due to increased resistance LOCK–
from gate hinges.
PF1
K1
WHT
FIRST OPR.
GRN
R4722
GTO Inc. Ta l l a ha s s e e , FL
K2
RED
BLK
Set Auto-Close Time
NOTE: Auto-Close timer is disabled (gate will not automatically close)
if gate is not at the fully open position.
SECOND OPR.
The Auto-Close determines how long the gate will remain open before
it automatically closes. The factory setting is OFF. Use a small flat
blade screwdriver, you can adjust the settings to OFF, or from 3 to 120
seconds.
BATT +
WHT
BATT –
K3
STATUS
GRN
1st OPR.
RED
K4
OPEN < JOG > CLOSE
2nd OPR.
14 VAC
OR
SET SOLAR
LIMIT
PWR.
OFF
BLK
120
SEC.
AUTO CLOSE
MIN
MAX OFF
STALL FORCE
120
SEC.
AUTO CLOSE
REMOVE
JUMPER FOR
VAR6
PUSH TO OPEN OPTION
ON OFF
SFTY.
VAR1
EXIT
JP1
VAR2
CYCLE
VAR3
EDGE
SENSOR
VAR4
COMMON
VAR5
LOCK+
LOCK–
PF1
K1
WHT
FIRST OPR.
GRN
K2
BLK
BATT +
SECOND OPR.
WHT
K3
GRN
RED
K4
BLK
14 VAC
OR
SOLAR
BATT –
R4722
GTO Inc. Ta l l a ha s s e e , F L
RED
VAR6
ON OFF
rev 12-14-15
Mighty Mule FM402 Installation Instructions
17
Personalize Your Transmitter Setting
All GTO transmitters have a standard setting and are ready to operate
your Mighty Mule Gate Opener. For your safety and security, we
strongly recommend that you replace the factory setting with your own
personal setting.
NOTE: If you have multiple transmitters, you should adjust all of them
at this time.
LE
Step 1
D
Use a small phillips head screw driver to remove the transmitter cover.
0
–
LK
AL
3S
IN
E
Set the transmitter DIP switches using a small screwdriver. There are
nine (9) transmitter DIP switches; each can be placed in three different
positions (+, 0, –). DO NOT set all the switches in the same position,
such as all +, all 0, or all –. Once the DIP switches have been reset,
replace and close the access cover.
Step 3.
Program the new setting in the control board memory.
A. Slide the control box ON/OFF switch to the OFF position.
B. Press and hold the transmitter button while sliding the ON/OFF
switch to the ON position.
C. Continue to hold the transmitter button until the alarm sounds
(3-5 seconds).
D. Release the transmitter button. The new transmitter setting is
now programmed.
E. Verify that the transmitter operates the gate.
1
2
3
4
5
A
A 2
Step 2.
WARNING: No other adjustments should be made inside the
transmitter.
+
12
BA
TT
ER
6
7
8
9
EC
E
V
Y
1 2 3 4 5 6 7 8 9
+
0
ECE
NOTE: It is NOT necessary to remove the cover of the control box to
program the new transmitter code, but when the control box cover is
removed the receiver range is reduced to less than 5 feet.
ON/OFF
Switch
ON/OFF
FCC WARNING: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s
authority to operate the equipment. In accordance with FCC Part 15, Section 15.21, the manufacturer is not responsible for any radio or TV
interference caused by unauthorized modifications to this equipment. Such modifications could VOID the user authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates,
uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to
radio communications. The external solid wire antenna was used during FCC testing. Substitutes should not be used.
However, there is no guarantee that interference will not occur in particular installations. If this equipment does cause harmful interference to radio
or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference
by one or more of the following measures: • Increase the separation between the equipment and the receiver. • Connect the equipment into an
outlet on a circuit different from that which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help.
18 Mighty Mule FM402 Installation Instructions
rev 12-14-15
Push-To-Open Installation Instructions
PUSH-TO-OPEN gates open out from the property (opener arms extend to open). Push-To-Open Brackets are required
for this type of installation, one for each gate [FM148] page 26. In a Push-To-Open installation, the opener is installed
while the gate is in the closed position and the opener fully retracted.
Swinging gates MUST NEVER open into public access areas!
Step 1: Read "Installation of the Gate Opener" on page 7.
Step 2: Determining The Mounting Position of The Post Bracket Assembly
A. 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). 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. 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.
B. With the gate in the closed position (up to 110º from its open
position), and the opener fully retracted, adjust the post
bracket assembly and gate bracket until the opener is level.
While holding the opener level, use C-clamps to temporarily
keep the post bracket assembly and gate bracket in their
respective positions on the fence post and gate.
IMPORTANT: 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 opener arm to the gate bracket with the gate in the open
position. This mounting position will give the opener the most
efficient leverage point for operation and provides the least
possible pinch area.
C. After verifying that you have the best position for the post
pivot bracket in the closed 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 open position. Again, check the
clearance and be sure that the gate opener is not binding at
the post pivot bracket.
IMPORTANT: If you don't have the required clearance, or if
the gate opener is binding, 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.
3/8" x 1 1/2" Bolt
Push-To-Open Bracket
(optional accessory FM148)
Post Bracket
3/8" Washer
3/8" Lock Nut
Push-To-Open Bracket Assembly
13" maximum
Gate in the Open Position
Pinch Area (gray)
1" minimum
Gate in the Closed Position
Pinch Area (gray)
1" minimum
D. When the post pivot bracket assembly is in the optimum
position, reattach the opener to the gate bracket (gate in the
closed position); recheck the gate opener level; make sure the brackets are clamped securely. Mark reference
points for bolt holes on the post through middle of post 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 post and gate.
E.Drill 3/8" holes through post as marked. Fasten post bracket assembly to the post using two 3/8" x 8" bolts,
washers and lock nuts. You must use bolts that completely penetrate the post. Drill 3/8" holes through the
gate cross member as marked. Mount gate bracket using two 3/8" x 2 3/4" bolts, washers, and lock nuts.
rev 12-14-15
Mighty Mule FM402 Installation Instructions
19
Step 3: Attach Opener Arm (page 10)
Step 4: Install Closed Position Stop Plates (page 11)
Step 5: Install the Control / Battery Box (page 12)
Step 6: Connect Battery Harness (page 13)
Step 7: Connect Opener Power Cables (page 14)
Step 7: Connect the Transformer (page 14) OR Solar Charger (page 21)
Step 8: Remove Push-To-Open Jumper
A. Make sure the control box power switch is OFF.
B. Use small pliers to remove the JUMPER for PUSH-TO-OPEN
applications.
C. Turn power switch ON. The control board is now configured to
push the gate open. (Keep the jumper, as it is necessary if there
is ever a need to convert the opener for Pull-To-Open.)
STATUS
1st OPR.
OPEN < JOG > CLOSE
2nd OPR.
MIN
120
SEC.
MAX OFF
STALL FORCE
SET
LIMIT
PWR.
AUTO CLOSE
REMOVE JUMPER FOR
PUSH TO OPEN OPTION
Step 9: Set the Open Position Limit (Push-to-Open)
Push-To-Open Jumper
The CLOSED limit is when the opener is fully retracted and the gate is
in the closed position. The closed limit setting can only be adjusted by moving the gate bracket. To acheive the optimum
open position, you must adjust the OPEN Limit setting:
A. If not already ON slide the ON/OFF switch on the Control Box to the ON position and make sure the arms are in
the CLOSED POSITION (fully retracted).
B. Press and HOLD the FIRST Opener OPEN button on the control board and be prepared to RELEASE the button
when the gates reached the desired open position/limit. Use the JOG OPEN and CLOSE buttons to "fine tune"
the gate position if neccessary.
C. Press and HOLD the SECOND Opener
OPEN button on the control board and
be prepared to RELEASE the button
when the gates reached the desired
open position/limit. Use the JOG
OPEN and CLOSE buttons to "fine
tune" the gate position if neccessary.
FIRST Opener
JOG Buttons
SECOND Opener
JOG Buttons
D. NOTE: The opener arms must be
extended more than 7 inches to set
limits. With the gates in in the desired
open positions PRESS and HOLD the
SET LIMIT button until the alarm and
RED Light come on. Then release the
button.
STATUS
1st OPR.
OPEN < JOG > CLOSE
2nd OPR.
PWR.
SET LIMIT Button
SET
LIMIT
MIN
MAX OFF
STALL FORCE
120
SEC.
AUTO CLOSE
REMOVE JUMPER FOR
PUSH TO OPEN OPTION
SET LIMIT Light
E. NOTE: When the control box cover is removed the receiver range is reduced to less than 5 feet. Press the
transmitter button once and allow the gates to fully close. The alarm will beep once when both gates reach the
CLOSED LIMIT. This indicates the LIMITS for both arms are learned and stored in memory.
F. Press the transmitter button and allow the gates to fully open to verify that they stop at the desired positions.
Repeat Steps B – E if correction is needed.
Note: Must have a transmitter that operates the gate. If not, see Personalize Your Transmitter Setting on page 18.
Step 10: Adjust Stall Force Setting (page 17)
Step 11: Set Auto Close Time (page 17)
Step 12: Personalize Transmitter Settings (page 18)
20 Mighty Mule FM402 Installation Instructions
rev 12-14-15
Solar Panel Instructions
NEVER USE TRANSFORMER AND SOLAR PANEL(S) AT THE SAME TIME!
It will damage the control board!
IMPORTANT INFORMATION ABOUT LOW VOLTAGE WIRE:
• The only wire acceptable for use with GTO products is 16 gauge stranded, low voltage, PVC sheathed wire. This
particular gauge enables the solar panel to provide an adequate charge through the control board to the battery
at distances up to 250'.
• DO NOT use telephone wire or solid core wire. Unlike stranded wire, these types of wire are inadequate for use
with your gate opener system.
Step 1
Make sure the power switch is OFF.
ON/OFF
Switch
ON/OFF
Step 2
Strip 3/16" off the ends of the low voltage wire and twist tightly. Attach
these ends to the 14VAC OR SOLAR terminals located on the terminal
block. Be certain not to let the exposed wires touch each other!
STATUS
1st OPR.
OPEN < JOG > CLOSE
2nd OPR.
PWR.
MIN
MAX OFF
STALL FORCE
SET
LIMIT
120
SEC.
AUTO CLOSE
REMOVE JUMPER FOR
PUSH TO OPEN OPTION
BATT +
K3
GRN
RED
K4
BLK
14 VAC
OR
SOLAR
VAR6
ON OFF
SFTY.
VAR1
EXIT
JP1
VAR2
CYCLE
Insert one solar panel wire into a 14VAC OR
SOLAR terminal. Insert the other solar panel
wire into the remaining 14VAC OR SOLAR
terminal. The wires can be connected to the
14VAC OR SOLAR terminals regardless of
color/polarity.
VAR3
EDGE
SENSOR
VAR4
COMMON
VAR5
LOCK+
LOCK–
PF1
K1
WHT
FIRST OPR.
Low Voltage Wire
from Transformer
or Solar Panel
Step 3
GRN
RED
K2
BLK
BATT +
SECOND OPR.
WHT
K3
BATT –
GRN
RED
K4
BLK
14 VAC
OR
SOLAR
R4722
GTO Inc. Tall ahassee, FL
SECOND OPR.
WHT
VAR6
Step 4
ON OFF
Tighten set screws against exposed end of wires. A dab of household
petroleum jelly on each terminal will help prevent corrosion.
NOTE: For multiple panels, wire the panels in
parallel as shown in this diagram.
Solar Panels connect in PARALLEL
RED
BLACK
rev 12-14-15
Low Voltage Wire from
Transformer or Solar
RED
BLACK
Mighty Mule FM402 Installation Instructions
21
Connecting Accessories and Safety Devices
Although GTO strongly recommends the use of additional safety devices, we do not endorse any specific brands.
Only use products that are certified and listed to be in compliance with any applicable UL standards
(Underwriters Laboratories) and national and regional safety codes.
Call GTO Sales at 1-850-575-0176 for information on compatible products for your specific application.
Step 1
Turn control box OFF before connecting safety device wires to the control board. (Unplugging the transformer does not
turn power to the opener OFF.)
Step 2
120
SEC.
AUTO CLOSE
REMOVE JUMPER FOR
PUSH TO OPEN OPTION
SFTY.
VAR1
EXIT
JP1
VAR2
CYCLE
VAR3
EDGE
SENSOR
VAR4
COMMON
VAR5
LOCK+
LOCK–
PF1
2
3
4
5
FIRST OPR.
RED
GRN
WHT
BLK
RED
GRN
LOCK–
8
WHT
LOCK+
COMMON
EDGE
SENSOR
EXIT
SFTY.
SET
LIMIT
MAX OFF
STALL FORCE
7
SECOND OPR.
6
8
7
PWR.
MIN
SET
LIMIT
1st OPR.
2nd OPR.
PWR.
2nd OPR.
STATUS
1st OPR.
OPEN < JOG > CLOSE
OPEN < JOG > CLOSE
MIN
Follow directions in Accessory Installation Manuals.
CYCLE
Step 3:
STALL FORCE
Run wires from safety devices and other accessories through the strain relief openings in the bottom of the control box.
ATIC
OM CK ®
AUTE LOLOCK
GASETCURITY
K1
IC
WHT
TRON
FIRST OPR.
ELEC
GRN
K2
BLK
BATT +
SECOND OPR.
WHT
K3
BATT –
GRN
RED
K4
BLK
14 VAC
OR
SOLAR
Automatic Gate Lock
R4722
GTO Inc. Tallahas s e e , F L
RED
5
6
Edge Sensor
VAR6
ON OFF
6
Accessory Wire
2
4
6
Push Button Control
1
4
GHI
7
PRS
2
ABC
5
JKL
8
TUV
Blue
3
Black
6
Red
+
Yellow
Shield
3
DEF
6
MNO
Photo Beams
-
6
9
WXY
Gate Opening Sensor
0
4
Digital Keypad
Refer to Sensor manual for
additional information if needed.
NOTE: Connections are for typical applications. For additional connection options not
illustrated here refer to the accessory manual for details.
22 Mighty Mule FM402 Installation Instructions
rev 12-14-15
STATUS
1st OPR.
OPEN < JOG > CLOSE
2nd OPR.
PWR.
SET
LIMIT
• Activation of this input while the gate is closing will cause the
gate to stop and return to the opened position.
1
SFTY.
2
EXIT
• Activation of this input while the gate is opening has no effect.
(gate will continue to open)
3
CYCLE
• Activation of this input while gate is idle will prevent gate from
closing.
4
EDGE
SENSOR
5
COMMON
• Activation of this input while at open limit will restart the auto
close time (if enabled).
6
LOCK+
7
LOCK–
2 EXIT: Typically for use with exit loop or wand
• Activation of this input while gate is idle will prevent gate from
closing.
GRN
4 RED
K2
BLK
BATT +
WHT
K3
BATT –
GRN
• Each activation at this input will cycle the operation as follows:
PF1
K1
3 CYCLE: Typically for use with doorbell button or hardwired
keypad
VAR4
WHT
SECOND OPR.
• Activation of this input while at open limit will restart the auto
close time (if enabled).
VAR3
VAR5
• Activation of this input will open the gate if it’s not already at the
open position.
JP1
VAR1
VAR2
FIRST OPR.
120
SEC.
AUTO CLOSE
REMOVE JUMPER FOR
PUSH TO OPEN OPTION
1 SAFETY: Typically for use with photo beam device, loop
detector or other non-contact sensors
MAX OFF
STALL FORCE
R4722
GTO Inc. Ta lla h a ssee, FL
Accessory Inputs
MIN
RED
K4
BLK
…→ OPEN → STOP → CLOSE → STOP → OPEN → …
EDGE SENSOR: Typically for use with contact edge sensor
• Activation of this input while gate is moving will cause it to
reverse direction for 2 seconds.
• Activation of this input while idle will prevent gate from running.
8
14 VAC
OR
SOLAR
VAR6
ON OFF
5 COMMMON: Common/Negative terminal for accessory
devices.
12 Volt Power (Maximum Current: 100 mA)
5 COM: Common/Negative terminal for accessory power source.
6 LOCK +: Power source for GTO/Mighty Mule accessories, i.e. Gate Opening Sensor [FM138].
Lock Outputs
6 LOCK +: Positive terminal to connect Automatic Gate Lock [FM143].
7 LOCK – : Negative terminal to connect Automatic Gate Lock.
Charge Power Inputs
8 14VAC or SOLAR: Power Input Terminals:
• Input terminals for transformer or solar panel.
• Non-polarity sensitive.
rev 12-14-15
Mighty Mule FM402 Installation Instructions
23
Troubleshooting Guide
If your gate opener does not function properly, use this guide or use the online troubleshooter at
http://support.gtoinc.com before calling the GTO Service Department.
VISUAL AND AUDIBLE DIAGNOSTIC INDICATORS
1. VISUAL INDICATORS:
a. Power LED (Green):
•ON: AC power or Solar power is present.
•OFF: There is no input power.
b. Status LED (Yellow): (while unit is running this LED will be OFF)
•Rapid blinking in random pattern: GTO’s transmitter 318 MHz signal is detected.
•Continuously ON: Battery is in fast charge mode.
•1 Blink every 2 seconds: Battery is in float charge mode (battery is fully charged)
•OFF: Switch is in the OFF position or there is no input power for at least 60 seconds.
2.AUDIBLE INDICATORS (ALARM/BUZZER):
a. Beeps upon power up:
•This is normal self test when the unit is turned on.
b. Continuous beep after power up:
•Unit has learned new transmitter code, releasing the transmitter button will shut off
the alarm.
c. Rapid beeping:
•Unit has encountered two (2) obstructions without reaching either limit. (Power cycle to reset the alarm)
•Transmitter will not operate the gate.
•Alarm will automatically shut off after 5 minutes; gate will remain disabled until control box is restarted.
d. 1 beep every 20 seconds:
•Low battery is detected.
e. 1 beep every 2 second:
•Position sensor is open circuit. Call GTO Service department.
f. 2 beeps every 2 second:
•Position sensor is short circuit. Call GTO Service department.
g. 1 beep when attempting to activate the opener:
•Blown fuse.
•Battery is extremely low or damaged.
•Loose connection from battery to circuit board.
3.IF THE GATE STOPS AND REVERSES DIRECTION
1. Check the gate for binding or hinge damage.
2. Adjust stall force if necessary.
3. Reprogram closed position limits.
4. Check the position of the mounting brackets and readjust if necessary.
24 Mighty Mule FM402 Installation Instructions
rev 12-14-15
VOLTAGE READINGS
14 Vac Transformer______________ 13.0 to 16.0 Vac
10 W Solar panel ________________ 18.0 to 22.0 Vdc 600 mA
Measure voltage at panel and control box.
12 V Battery_____________________ 12.5 to 13.5 Vdc
Charging circuit _________________ 13.8 to 14.8 Vdc
Measure voltage at battery terminals with battery connected.
Gate and Opener Maintenance:
1. Keep gates properly maintained. Grease hinges. Make sure gates remain level. Replace worn or damaged
hardware. On gates over 250 lbs, grease ball bearing hinges at least 4 times annually (more if in a coastal area).
2. Service the gate opener regularly (make sure control box is OFF). Clean extended opener arm with a soft, dry, cloth
and apply high quality silicone spray once a month. Replace battery every 1–2 years.
Warranty Repair
If your Mighty Mule Gate Opener is not operating properly, please follow the steps below:
1. First use the procedures found in the Visual and Audible Diagnostic Indicators section (page 24).
2. Use the 24/7 Troubleshooting "Wizard" at http://support.gtoinc.com.
3. If you are unable to solve the problem, call the GTO Service Department at (800) 543-1236, or (850) 575-4144.
Refer to the serial number (located on the back of opener arm) and date of purchase when calling for assistance.
4. If replacement of your gate opener is necessary, the Service Department will assign a Return Goods
Authorization (RGA) number to you for all warranty repairs.
5. Securely pack the component(s) authorized for return to the factory. Write the RGA number issued to you on the
outside of the package in LARGE BOLD PRINT and include a copy of the proof of purchase. Ship the package(s)
freight prepaid to: GTO, 3121 Hartsfield Road, Tallahassee, Florida, USA 32303.
NOTE: Products returned to GTO without a Return Goods Authorization (RGA) number in LARGE BOLD
PRINT on the outside of the package WILL NOT be accepted. Also, items returned to GTO freight collect
WILL NOT be accepted.
After the eighteen (18) month warranty expires, GTO, or one of its authorized service
centers will perform necessary repairs for a nominal fee. Call GTO's Technical Service
Department.
GTO Technical Service and Installation Assistance
8:00am–7:00pm • Monday–Friday (EST)
Toll Free Support: 800-543-1236 • Fax: 850/575-8950
24/7 Troubleshooting Wizard: http://support.gtoinc.com
GTO Access Systems, LLC
3121 Hartsfield Road, Tallahassee, Florida, USA 32303
www.mightymule.com
rev 12-14-15
Mighty Mule FM402 Installation Instructions
25
Accessories
Please visit www.mightymule.com for photos and detailed descriptions of
Mighty Mule Accessories or call 1-850-575-0176.
Solar Panel (FM123) 10 watt
If your gate is more than 1000' from an AC power source, you can choose to maintain the
battery charge with the Solar Panel Charging Kit. Installation in some regions of the world will
require multiple solar panels for adequate charging power.
Pin Lock (FM133)
The Pin Lock substitutes for the clevis pin at the front end of the Mighty Mule gate openers.
Helps prevent theft of the opener from the gate.
Single Button Transmitter (FM135)
The Mighty Mule entry transmitter, with adjustable settings, is standard equipment with all Mighty
Mule systems. Purchase one for every vehicle in your family.
1
4
2
ABC
5
GHI
JKL
7
PRS
TUV
8
Digital Keypad (FM137)
Allow friends and delivery personnel to pen the gate using a personal identification code that
you provide. Easily program up to 25 different personal identification number (PIN) codes. The
digital keypad can be wireless or wired to your opener.
3
DEF
6
MNO
9
WXY
0
Keypad Mounting Post (FM100)
This black powder coated pedestal is designed to provide convenient access to your keypad,
wireless intercom, or other access control device from your vehicle. Surface Mount Flanges
(F102) and Extensions (F103) for added height are available.
Gate Opening Sensor (FM138)
The Sensor is an electromagnetic sensor, which offers "hands free" operation of the Mighty
MuleGate Openor with a 12 ft. radius of detection of vehicles in motion. A wireless version of the
Gate Opening Sensor is available. (FM130)
ATIC®
CK
TOM
LOLO
AUTE
CK
ITY
GASEC
UR
NIC
CTRO
ELE
Automatic Gate Lock (FM143)
A MUST for added security. Solenoid driven, with a steel housing. Unlocks and locks
automatically as gates open and close. Comes with a keyed manual release. Recommended for
gates over 8 ft. long.
Wireless Driveway Alarm (FM231)
This device alerts you of vehicles entering and exiting your property. When a vehicle passes the
sensor, the receiver emits an audible tone and lets you know someone’s there. Functional range
of up to 400 ft. Easy-to-install.
Low Voltage Wire (RB509)
The 16 gauge, stranded, dual conductor Low Voltage Wire is for connecting the AC powered
transformer, or the Solar Panel to the control board. Also used for the connection of accessories,
such as locks, keypads, push buttons and other wired control devices. This specially designed
wire is UV treated, PVC coated and ready for direct burial.
Push to Open Bracket (FM148)
Required when Mighty Mule gate opener must push the gate open, such as on a sloping
driveway or where space prevents gate(s) from opening inward (pulled open). Order two
brackets for conversion of a dual swing gate installation.
26 Mighty Mule FM402 Installation Instructions
rev 12-14-15
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