Mighty Mule Silver-md single User manual

©2004 Gates That Open, LLC
rev - 08/25/11
Installation Manual for the
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 Gates That Open, 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 Gates
That Open, 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 opener safety,
as established and made effective March 1, 2000, by Underwriters Laboratories Inc.
3121 Hartseld Road • Tallahassee, Florida, USA 32303
Telephone GTO Sales: 1-800-543-GATE (4283) or [phone] • Fax [phone]
or GTO Technical Service: 1-800-543-1236 or [phone] • Fax [phone]
www.gtoaccess.com
ANNIVERSARY
SERIES
MEDIUM DUTY
Printed in China for GTO

U.L. Gate Operator Classications
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 (ve 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 GTO 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.
The GTO Gate Operator system certied to be in compliance with the following safety standards (current edition as of
publication date):
Converting Metric Units to English Equivalents
When You Know Multiply By To Find Symbol
centimeters 0.3937 inches in. (or ")
meters 3.2808 feet ft. (or ')
kilograms 2.2046 pounds lb. (or #)
Converting English Units to Metric Equivalents
When You Know Multiply By To Find Symbol
inches 2.5400 centimeters cm
feet 0.3048 meters m
pounds 0.4535 kilograms kg
Converting Temperature
deg. Celsius (°C x 1.8) + 32 deg. Fahrenheit °F
deg. Fahrenheit (°F-32) ÷ 1.8 deg. Celsius °C
Serial Number: ___________________________________ Date of Purchase: ________________
Place of Purchase:___________________________________________________________________
Please record the following information product serial number (located on right side of control box), 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.
FOR YOUR RECORDS
Product in compliance with the latest UL-325 and UL-991 safety standards by ETL. Product in compliance with
CAN/CSA-C22.2 No. 247-92.
Product in compliance with IEC 60335-2-103:2003 and IEC 60335-1:2004, including A1:2004.

Gate Opener Class Categories -------------------------------------------------------------inside cover
Units and Standards Conversion Chart ---------------------------------------------------inside cover
PLEASE READ THIS FIRST! --------------------------------------------------page iii
Important Safety Instructions --------------------------------------------------page 1
Disconnecting the Opener -------------------------------------------------------------page 1
Important Safety Instructions for the Consumer------------------------------------page 2
Secondary Means of Protection Against Entrapment ------------------------------page 5
Required Safety Precautions for Gates-----------------------------------------------page 6
Warning Signs and Labels -------------------------------------------------------------page 7
Installation --------------------------------------------------------------------------page 8
Parts List ---------------------------------------------------------------------------------page 8
Technical Specifications -------------------------------------------------------------page 10
Installation Overview ------------------------------------------------------------------page 11
Installation of the Mounting Hardware ----------------------------------------------page 12
Mounting the Opener-------------------------------------------------------------------page 16
Installation of the Closed Position Stop ---------------------------------------------page 16
Powering the System --------------------------------------------------------------page 18
Solar Chart-------------------------------------------------------------------------------page 18
Installing the Battery Box -------------------------------------------------------------page 19
Connecting the Batteries ---------------------------------------------------------------page 20
Connecting Power Cable to Opener --------------------------------------------------page 21
Detailed Wire Routing Diagram ------------------------------------------------------page 22
Connecting the Transformer-----------------------------------------------------------page 23
Connecting Solar Panel(s) -------------------------------------------------------------page 25
Control Board Settings ----------------------------------------------------------page 25
DIP Switches ---------------------------------------------------------------------------- page 25
Setting the Closed Position ------------------------------------------------------------page 26
Obstuction Sensitivity and Auto-Close ----------------------------------------------page 27
Setting Your Personal Transmitter Code -------------------------------------page 28
Installing the Receiver -----------------------------------------------------------page 29
Connecting Accessories ----------------------------------------------------------page 30
Wiring Accessories ----------------------------------------------------------------page 31
Push to Open Installation --------------------------------------------------------page 33
Maintenance & Troubleshooting Guide --------------------------------------page 36
Repair Service ---------------------------------------------------------------------page 38
Column Installation Information ----------------------------------------------page 39
Accessory Catalog ----------------------------------------------------------------page 40
Table of Contents
KEEP THESE INSTRUCTIONS FOR FUTURE REFERENCE

PLEASE READ THIS FIRST!
iii
Thank you for purchasing a GTO/ACCESS SYSTEMS gate opener. When correctly installed and properly used,
your gate operator will give you many years of reliable service. Please read the following information to ensure
you have the correct system for your particular needs. This manual will enable you to properly install your
Automatic Gate Operator.
The gate operator is designed for installation on a Pull-To-Open (gate that opens into the property) single leaf
gate. By purchasing an optional Push-To-Open Bracket (347IH) the gate operator can accommodate a Push-To-
Open (gate that opens out from the property) single gate leaf. The gate must not exceed 16 feet in length nor
weigh more than 550 pounds* (please see Technical Specifications on page 10). The gate operator can be used on
vinyl, aluminum, chain link, farm tube, and wrought iron gates. Use on solid (wood) gates is not recommended.
Solid surface gates have a high resistance to the wind. If the wind is strong enough, the operator will obstruct,
stop, and blow fuses, or may damage equipment
The gate operator accommodates extra transmitters, digital keypads, solar panels, push buttons, automatic gate
locks, and other access control products. These optional accessories are shown in the back of this manual.
The gate operator features adjustable stall force. This safety feature makes the gate stop and reverse direction
within two 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.
The gate operator also has an adjustable auto-close feature. It can be set to remain open from 3 to 120 seconds
before automatically closing. Pressing the transmitter button at any time after the gate fully opens will cause it to
close immediately. “OFF” is the factory setting; meaning the gate will stay open until you press the transmitter
button (or keypad, etc.) again.
Please call GTO at (800) 543-GATE [4283] or [phone] for more information about our GTO/ACCESS
SYSTEMS professional line of gate operators and accessories.
BEFORE YOU BEGIN TO INSTALL YOUR AUTOMATIC GATE OPERATOR:
Read these instructions carefully and completely to become familiar with all parts and
installation steps. You must read the installation manual for detailed instructions on gate
operator safety and proper use of the gate operator.
24/7 Troubleshooting Wizard: http://support.gtoinc.com

1
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.
Precautions and warnings in this manual are identified with this warning symbol. The symbol 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.
Disconnecting the Opener
1. Turn opener power switch OFF.
2. Remove hairpin clip, clevis pin, and bushing
from the front mounting point.
3. Remove the opener from the mount.
The gate can be opened and closed manually
when the opener is disconnected.
To Manually Open and Close the
Gate, Follow the Procedure Below:
CAUTION: The gate will move freely and uncontrolled when the gate opener
is removed from the gate. ONLY disconnect the opener when the opener power
switch is OFF and the gate is NOT moving.
Clevis Pin
Hairpin Clip
Gate Bracket
Front Mount
Bushing
CAUTION: Because the Mighty Mule gate opener is
battery powered, disconnect the opener ONLY when the
power switch on the opener is turned OFF. Unplugging
the transformer does not turn power to the opener OFF.
IMPORTANT: NEVER allow opener arm to hang
by the front mount - it will break from the arm weight.
NOTE: Substitute included Pin Lock for the clevis pin on the
front mount of the gate opener to prevent unauthorized removal
of the opener from the gate.

2
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 (see page 1).
4. This gate opener is intended for vehicular gates ONLY. A separate entrance or gate must be installed for pedestrian
use (see page 6).
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.
Entrapment
Zones for a
Pull-To-Open
Application
Gate in the
Open Position
ZONE 2
ZONE 3
ZONE 4
ZONE 5
Driveway
ZONE 1

3
IMPORTANT SAFETY INSTRUCTIONS
Moving Gate
Area
Driveway
10'
10'
10'
10'
NEVER INSTALL
any control device
within gray area
Entrapment Zones for a proper Pull-To-Open installation:
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 opener and gate or post.
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 key switches 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.
Pull-To-Open
Application

4
IMPORTANT SAFETY 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 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 the
remote controls 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 opener OFF before performing any
maintenance. Spray a soft cloth with silicone spray and clean the push-pull tube at least once per month.
7. Service the gate and gate opener regularly. Grease hinges, spray push pull tube with high quality silicon spray.
8. To operate this equipment safely, YOU must know how to disconnect the opener for manual gate operation
(see page 1). If you have read the instructions and still do not understand how to disconnect the opener, contact the
GTO Service Department.
9. Disconnect the opener ONLY when the power is TURNED OFF and the gate is NOT moving.
10. Make arrangements with local fire and law enforcement for emergency access.
11. Distribute and discuss copies of the IMPORTANT SAFETY INSTRUCTIONS 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 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 GTO® Access Systems web site (www.gtoaccess.
com), by contacting Gates That Open, 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.

5
IMPORTANT SAFETY INSTRUCTIONS
ENTRAPMENT ALARM (UL 325; 30A.1.1A)
The GTO® 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
hardwired 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 opener arm OFF and back ON will also deactivate the alarm. Wireless controls such as
transmitters and wireless keypads will not deactivate the alarm.
Vehicular Gate
Leading 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 BeamPhoto Beam Photo BeamPhoto Beam
As specified by Gate Operator Safety Standard, UL 325 (30A.1.1), automatic gate operators 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. GTO gate openers utilizes Type A, an inherent (i.e., built-in) entrapment sensing system as the
primary type of entrapment protection. Also, the gate opener has provisions for the connection of Type B1 or B2 protection
to be used as the secondary type of entrapment protection, if desired.
1. For gate operators utilizing a non-contact sensor (e.g., photo-electric sensor– Type B1) in accordance with UL 325
(51.8.4 [h]):
A. Refer to the sensor manufacturer’s instructions on the placement of non-contact sensors for each type of application.
B. Care shall be exercised to reduce the risk of nuisance tripping, such as when a vehicle trips the sensor while the gate
is still moving.
C. One or more non-contact sensors shall be located where the risk of entrapment or obstruction exists, such as the
perimeter reachable by a moving gate or barrier.
2. For gate operators 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 operator is not subjected to mechanical damage.
C. A wireless contact sensor such as one that transmits radio frequency (RF) signals to the gate operator 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.

6
IMPORTANT SAFETY INSTRUCTIONS
Install Warning Signs
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.
Required Safety Precautions for Gates
Warning Signs
The warning signs (at right) must
be installed on both sides of the
gate (see page 7 for details).
Warning signs alert people of automatic gate operation and are required when installing the GTO® Access Systems Gate
Opener. 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 (Call the GTO Sales Department) for controlled access.
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
!
Warning Sign
Pedestrian Gate
Bu
lld
og Pe
d
estrian
Gate Lock
Vehicular Gate
Contact Sensor
(recommended, not included)
Contact Sensor
(recommended, not included)
Contact Sensor
(recommended, not included)
(recommended, not included )

7
IMPORTANT SAFETY INSTRUCTIONS
!
Warning signs (2 enclosed) to be installed on each side
of the gate (3–5 feet above the bottom of the gate).
Product identification label (1)
installed under rear mount on arm.
Logo and warning labels (2) installed on each side of opener housing.
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.
Can Cause Injury or Death
MOVING
GATE!
! !
TO MANUALLY OPEN AND CLOSE THE GATE
1. Turn opener power switch OFF.
2. Disconnect front or rear mount from
mounting bracket.
3. Pull opener away from mounting
bracket and move gate.
Disconnect opener ONLY when the power
switch is OFF and the gate is not moving.
Maximum Gate: 550 lbs. (249.4 kg); 16 ft. (4.9 m) • Voltage: 12 Vdc; Frequency: 0Hz; Power: 25W • Class I Vehicular Swing Gate Operator
ANNIVERSARY
SERIES
1-800-543-4283 www.gtoaccess.com
MEDIUM DUTY
GTO DC SWING SERIES
Conforms to UL325
5th Edition Standards
Serial No.
SSMD-0000000
XXXXXX
Gates That Open, LLC - Tallahassee, Florida USA
9901178
These warning labels should be found at the
locations specified below. If any of them
are missing, immediately contact GTO for
replacements.

8
Parts List - Opener and Mounting Hardware
Hairpin Clip (2)
3/8" x 1-1/2" Clevis Pin (2)
5/16" x 1-3/4" Bolt (1)
3/8" x 2" Bolt (1)
3/8" x 8" Bolt (4)
8" Nylon Cable Tie (14)
3/8" Washer (9)
3/8" Lock Washer (7)
5/16" Washer (1)
3/8" Nut (7)
5/16" Nut (1)
Hardware Bag Contents
Gate Opener (1)
Pin Lock (1)
Battery Box (1)
Batteries (2)
Gate Bracket (1)
Post Pivot Bracket (1)
3/8" Bushings (2)
Post Bracket (2)
Closed Position
Stop Plate (1)
2" Mounting Screw (5)
Transformer (1) 10’ Battery Wire
Harness (1)
Battery Connector
Harness (1)
Warning Signs (2)
GTO Transmitters(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
!
Receiver (1)
5
15
1
3/8" x 2-3/4" Bolt (2)

9
Tools Needed
• Power Drill
• Open End Wrenches — 1/2", and 9/16"
• 3/8" Drill Bit
• Hacksaw or Heavy Duty Bolt Cutters
• Small (Flat Bladed) Screwdriver
• Phillips Screwdriver/ Large
• Tape Measure
• Level
• Wire Strippers
• C-Clamps — small, medium, and large
• Center Punch
• Extra person will be helpful
YOU MAY ALSO NEED THESE ITEMS BEFORE YOU BEGIN THE INSTALLATION
(Some of these items can be found in the Accessory Catalog page 40):
• 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 opener arm. See Powering the System on page 18,
and the Accessory Catalog.
• If your gate is more than 1000' away from AC power source you will need to use at least one GTO 5 watt Solar
Panel (FM122) to charge the 12 Volt batteries. See the Accessory Catalog.
• If your fence post is made of wood and is less than 6" in diameter or 6" square, see page 12.
• If your fence post is larger than 6" in diameter you will need threaded rods or carriage bolts longer than 8". See
page 15.
• PVC conduit.
• If you have thin walled tube or panel gates, see Recommended Reinforcement Examples on page 12.
• Depending on the type of gate, a horizontal cross member or mounting plate may be needed to mount the front
of the opener and gate bracket to the gate. See page 11, step 2; page 15, step 10.
• Surge protection for transformer.
• Some types of installations require U-Bolts.

10
DRIVE
• Low friction screw drive (linear actuator) rated for -5 ºF to +160 ºF (-28 ºC to +71 ºC).
• Powered by a 12 V motor with integral case hardened steel gear reducer. Motor speed reduced to 260 rpm.
• Maximum opening arc of 110º. Approximate opening time (90º): 18 seconds, depending on weight of gate.
POWER
• The system is powered by two 12 Vdc 7.0 Ah, rechargable acid batteries.
• Battery charge is maintained by a 120 Vac, 18 Vac output transformer [rectied to 14.5 Vdc (40 VA) through the GTO
control board] or by optional GTO Solar Panels [the panel should generate minimum of 5 W at 300 mA]. 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 control board 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 single leaf, pull-to-open gate installations. DIP switches can be
adjusted to accommodate an optional kit for push-to-open gates (see Accessory Catalog).
• A circuit on the control board regulates charging. "Sleep draw" is 25 mA; "active draw" is 2 to 5 A.
• Auto-memorization of digital transmitter code.
•GTO remote-mounted RF receiver tuned to 318 MHz.
• Opener length with push-pull tube fully retracted is 371/4", mounting point to mounting point.
• Adjustable auto-close timer (OFF to 120 s), and obstruction sensitivity.
• Power terminal bock accommodates a transformer or solar panels.
• DIP switches simplify setup of gate opener.
• Accessory terminal block fully compatible with all GTO 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 gate opener when powered with
a transformer. Actual cycles may vary slightly depending upon the type and condition of gate and installation.
GTO® Access Systems Gate Opener
Technical Specifications
These specifications are subject to change without notice.
Gate Weight
Gate Length
Number of Cycles Per Day
Gate Capacity /Cycle Chart
Estimated number of daily cycles, based on use with a transformer.
550 lbs.
450 lbs.
350 lbs.
250 lbs.
150 lbs.
100 lbs.
50 lbs.
125
135
145
155
165
175
185
5’ - 6’
115
125
135
145
155
165
175
8’
115
125
135
145
155
165
10’
115
125
135
145
155
12’
115
125
135
145
14’
115
125
135
16’
NR
NR
NR
NR
NR
NR
NR
NR
NR
NR
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 18.
* An operation cycle is one full opening and closing of the gate.
NOTE: "NR" indicates this
size and weight combination
is not recommended for the
gate operator.

11
Preparation of the Gate
Step 1
The gate must be plumb, level, and swing freely on its
hinges. Wheels must not be attached to the gate. The
gate must move throughout its arc without binding or
dragging on the ground. Note that gates over 250 lb.
should have ball bearing hinges with grease fittings.
Step 2
The fence post must be secured in the ground with
concrete so it will minimize twist or flex when the
opener is activated. We recommend you position the
opener near the centerline of the gate to keep the gate
from twisting and flexing. 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.
Horizontal Cross Member
Gate Swings Evenly and Freely
Hung Firmly and Plumb
Receiver
Post Bracket Assembly
Battery Box
Gate Bracket
Single Gate Opener
Fence Post Set in Concrete
Run 1000' (max.) of low
voltage wire to control
box from transformer
(wire not included).
10’ Battery Harness
Closed Position Stop Plate
120 Volt indoor
Transformer
(surge protector
not supplied)
PVC conduit (not included)
to protect wire from lawn
mowers and weed eaters.
Warning Sign
Installation Overview
Pull-to-Open Gates (Gate Opens into the Property)
The diagram shown below is an example of a pull-to-open installation on a chain link fence and single gate. Mounting the
opener on a masonry column requires special procedures; see Column Installation Information on page 39 if you intend
to mount the opener on a column. Furthermore, if you have a push-to-open gate, you will need to purchase a push-to-open
bracket (347IH) (see Accessory Catalog) to properly configure your system. See Push to Open Installation on page 33
before proceeding.
Horizontal Cross Member
Vertical Cross Member

12
Installation of Mounting Hardware
The position of the post bracket determines the leverage and efficiency of the opener. The post bracket position also sets the
clearance between the opener and gate in the open and closed positions (minimum 2 inches for safety reasons).
The curved design of the post bracket works well for installations on round and square fence posts. Because the post bracket
carries the entire thrust of the active opener, bolts that completely penetrate the fence post must be used.
On wooden posts, place a metal plate or washer
(not supplied) between the nuts and the fence
post to prevent the thrust of the opener from
pulling the bolts and washers out of the wood.
NOTE: A fence post smaller than 6" in diameter
or 6" square should be made of metal instead
of wood so that it will remain stable while the
opener is moving the gate.
On round posts of 6" diameter or larger, the post pivot bracket may
not be necessary for the installation. In this instance, the two post
brackets are mounted by themselves.
Post 
Bracket
Post 
Pivot Bracket
Metal Plate
Wooden Post
Post
Bracket
Post
Pivot Bracket
Metal Plate
Wooden Post

Center of Gate Hinge
Pull-to-Open Installation
Larger than 6" diameter post
Recommended Reinforcement Examples
IMPORTANT:
We strongly recommend using steel pipe, wood or metal to reinforce thin walled tube gates or wood to reinforce panel gates
as shown. These reinforcement methods will prevent damage to the opener and gate when the opener is installed.
Thin Walled
Tube Gate
Gate Bracket
Muffler Clamp
(not supplied)
Gate Bracket
Wood or Metal
Reinforcement
(not supplied)
Gate
Bracket
Panel
Gate
1" x 6"
Wood
Reinforcement
Muffler Clamp for
Gate Bracket
Wood or Metal
Reinforcement
1" x 6" Wood
Reinforcement

13
Determining the Mounting Position
of the Post Bracket Assembly and the Gate Bracket
Step 5
With the gate in the open position (up to 110º from its closed 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.
Step 3
Insert the 3/8" x 2" bolt through
the center hole of the post
brackets and post pivot bracket
as shown. Fasten a 3/8" lock
washer, 3/8" washer and 3/8" nut
on the end of the bolt. DO NOT
overtighten the nut because the
post pivot bracket will have to be
adjusted later.
Step 4
Attach post bracket assembly and gate bracket to the opener with the clevis pins and bushings. Secure the clevis pins with
hairpin clips.
3/8" x 2" Bolt
3/8" Nut
Post Pivot Bracket
Post Bracket
Post Bracket
3/8" Lock Washer
Post Bracket Assembly
3/8" Washer
NOTE: The following steps are
intended for pull-to-open gate
installations. If you are mounting
your opener on a push-to-open gate
(e.g., a gate on a sloped driveway)
you will need to purchase a Push
To Open bracket (347IH) (see
Accessory catalog). Also, see Push-
to-Open Installation beginning on
page 33.
Clevis Pin
Hairpin Clip
Post Bracket Assembly
Bushing
Rear Mount
Opener
Level Opener
Fence Post
Gate In Open Position
LEVEL horizontal cross member
Post Bracket Assembly
Gate Bracket
Clevis Pin
Hairpin Clip
Gate Bracket
Front Mount
Bushing

14
Gate in the
CLOSED POSITION
Pinch Area
Gate in the
OPENED POSITION
Pinch Area
2" minimum
2" minimum
Be sure gate opener
and bracket don't bind.
7” - 19” stroke
Step 6
When you feel that you have the best position for the post pivot bracket in the open position, insert the 5/16" x 1-3/4" bolt
through the aligned holes of the post bracket and post pivot bracket to hold it in place. Remove the clevis pin from the front
mount and while supporting the gate opener, swing the gate and gate opener to the closed position. With the gate and gate
opener in the closed position check the clearance and be sure that the gate opener is not binding at the post pivot bracket.
If you don't have 2 inches of clearance or the gate opener is binding on the post pivot bracket, remove the 5/16" x 1-3/4" bolt
and readjust the pivot bracket until you can achieve these important clearances.
With the post pivot bracket in the optimum position for clearance and freedom of movement, reattach the opener to the gate
bracket in the open position and recheck the gate opener level and make sure the brackets are clamped securely.
IMPORTANT:While determining the mounting point for the post pivot bracket assembly, be sure that the position allows
for minimum 2 inches of clearance between the gate and the opener in both the open and closed positions, as shown in the
diagrams below. This clearance will give the opener the most efficient leverage point for opening and closing the gate and
more importantly provides the least possible pinch area.
TIP: Turning the pivot bracket over gives
more hole alignment options for the post
pivot bracket assembly. You can also move
the entire post pivot bracket assembly to
different positions on the gate post to help
achieve the proper clearances.

15
Installing the Post Bracket Assembly and Gate Bracket
Step 7
Mark reference points for bolt holes for the gate bracket on
the fence post through middle of bracket slots. Also mark the
holes for the gate bracket holes on the cross member of the gate
(shown in Step 10). Marking reference points in this manner
allows room for adjustment when mounting the post bracket
assembly and gate bracket. After marking your reference points,
remove the opener and brackets from the fence and gate.
Step 8
Drill 3/8" holes into fence post as marked.
Step 9
Fasten post bracket assembly to the fence post using
(4) 3/8" x 8" bolts, washers, lock washers, and nuts (provided).
Remove excess bolt length extending beyond the tightened nuts
with a hacksaw or bolt cutters.
NOTE: In cases where the fence post has a diameter larger than
6", threaded rods or carriage bolts longer than 8"
(not supplied) must be used.
Step 10
Drill 3/8" holes into the gate cross member as marked.
Mount gate bracket using (2)
3/8" x 23/4" bolts, washers, lock washers,
and nuts (provided). Cut off excess bolt
length extending beyond the tightened
nuts.
Gate Bracket Mounting Examples
Round Tube & Chain Link Gate
Square Tube Gate
Mounting Plate
Created for
Decorative Gate
(required but not
supplied)
Remove excess bolt length
with hacksaw or bolt cutters
FRONT VIEW SIDE VIEW
FRONT VIEW
SIDE VIEW
Round Metal Post
Round Wood Post
Square Metal Post
Square Wood Post
Remove excess bolt length 
with hacksaw or bolt cutters
SIDE VIEW
TOP VIEW
EXAMPLES
Post Bracket
Assembly
Mark fence post through 
middle of bracket slots
and drill 3/8" holes
Gate In Open Position
LEVEL horizontal cross member
Mark cross member through middle of
gate bracket slots and drill 3/8" holes

16
Mounting the Opener
Step 11
Attach the opener to the securely bolted post bracket assembly and gate bracket using clevis pins, bushings, and hairpin clips,
or Pin Lock (included). Verify that the opener is level and adjust the post bracket assembly if necessary.
Installation of the Closed Position Stop
The GTO® Gate Opener firmly holds the gate in the closed position using the positive stop plate. The positive stop
helps stabilize the gate leaf in the closed position. To further enhance the stability and security of your gate, install
the optional GTO Automatic Gate Lock (see Accessory Catalog).
Level Opener
Gate In Open Position
LEVEL horizontal cross member
Post Bracket
A
ssembly
bolted to fence post
Clevis Pin, Bushing, and Hairpin Clip
Clevis Pin, Bushing, and Hairpin Clip
Gate Bracket bolted
to gate cross member
Fence Post
Step 12
Remove hairpin, clevis pin, and washer from front mount
and close the gate (remember to support opener). Fasten
the closed position stop plate to the end of the gate frame on
the gate centerline, but do not tighten it completely. Slide
the stop plate toward the fence post until they touch (see
illustration). Once you have moved the stop plate to the
correct position, tighten its hardware completely.
Use the appropriate hardware for your type of gate (use
U-bolts if you have a tube or chain link gate; wood or lag
screws for wood gates; etc.). This hardware is not provided.
Closed Position
Stop Plate
Closed Position Stop Plate mounted
on metal post with U-bolts.
Gate Hinge
The gate opens to 110º (max.)
Fence Post
Gate Post
TOP VIEW
SIDE VIEW