Nortek Security & Control Mighty Mule MM372W User manual

Copyright©2019 Nortek Security and Control, LLC. 10022114 A
Mighty Mule®is the retail brand of Nortek Security and Control, LLC.
This product meets the requirements of UL325 7th Edition, the standard for gate operator safety.
Installation Manual
(For a single or dual gate installation)
Horizontal Support
Gate Swings Evenly and Freely
Hung Firmly and Plumb
Post Bracket Control Box
Fence Post Set in Concrete Fence Post Set in Concrete
Run 1000' (max.) of low
voltage wire to control
box from transformer
(wire not included).
Power Cable
PVC conduit (not included)
to protect wire from lawn
mowers and weed eaters.
PVC conduit (not included)
to run second opener power
cable under driveway.
Gate Bracket
Warning Sign
Secondary Opener Primary Gate Opener
Horizontal Support
Post Bracket
Gate Bracket
Warning Sign
120 Volt indoor
Transformer
(surge protector
not supplied)
12 Volt automotive or marine
type battery in weather proof
housing (not included).
Example of Dual Gate nished installation
(Installations vary slightly on different types of gates)
MM371W
MM372W
Single gate installation [MM371W]
Dual gate installation MM372W]

Product Usage
The Mighty Mule Gate Operator meets all of the safety requirements of a Class I Residential Vehicular Gate Operator and is intended for use solely
with vehicular swing gates in single-family residential applications that meet the Class I category listed in the table below.
Residential Vehicular Gate Operator-Class I:
A vehicular gate operator (or system) intended for
use in garages or parking areas associated with a
residence of one-to-four single families.
Commercial/General Access Vehicular Gate
Operator-Class II:
A vehicular gate operator (or system) intended for
use in a commercial location or building such as a
multi-family housing unit (ve or more single family
units), hotel, garages, retail store, or other buildings
accessible by or servicing the general public.
Industrial/Limited Access Vehicular Gate Operator–Class III:
A vehicular gate operator (or system) intended for use in an industrial
location or building such as a factory or loading dock area or other
locations not accessible by or intended to service the general public.
Restricted Access Vehicular Gate Operator – Class IV:
A vehicular gate operator (or system) intended for use in an industrial
location or building such as a factory or loading dock area or other
locations not accessible by or intended to service the general public.
Vehicular Gate Operator Class Categories
WARNING
This equipment meets Underwriters Laboratory Standard 325 (UL 325). However, gate equipment has
hazards associated with its use and therefore by installing this product the installer and user accept
full responsibility for following and noting the installation and safety instructions. Failure to follow
installation and safety instructions can result in hazards developing due to improper assembly. You agree
to properly install this product and that if you fail to do so Nortek Security and Control, LLC, shall in
no event be liable for direct, indirect, incidental, special or consequential damages or loss of prots
whether based in contract tort or any other legal theory during the course of the warranty or at any time
thereafter. The installer and/or user agree to assume responsibility for all liability and use of this product
releasing Nortek Security and Control, LLC, from any and all liability. If you are not in agreement with
this disclaimer or do not feel capable of properly following all installation and safety instructions you may
return this product for full replacement value.
READ ALL INSTRUCTIONS CAREFULLY AND COMPLETELY before attempting to install and
use this automatic gate operator. This gate operator produces a high level of force. Stay clear of the unit
while it is operating and exercise caution at all times.
ALL AUTOMATIC GATE OPERATORS ARE INTENDED FOR USE ON VEHICULAR GATES ONLY.

Table of Contents
Please Read This First! .......................................................................................................................... ii
Important Safety Information................................................................................................................ iii
Manually Opening and Closing Gate ................................................................................................................................................ iii
For the Installer and End User.......................................................................................................................................................... iv
Installing Warning Signs and Pedestrian Gates ...............................................................................................................................viii
Required Safety Precautions for Gates............................................................................................................................................. ix
Technical Specications ........................................................................................................................ x
Mighty Mule 371W/372W Gate Opener............................................................................................................................................. x
Powering Options............................................................................................................................................................................ xi
Solar Panel and Gate Activity Chart.................................................................................................................................................. xi
Before You Begin................................................................................................................................... xi
Check Existing Gate Size and Material............................................................................................................................................ xii
IMPORTANT: Check for Proper Gate Installation............................................................................................................................... xii
Items Included for Primary Gate Opener Installation (MM371W)......................................................................................................xiii
Items Included for Secondary Opener Installation (MM372W) .........................................................................................................xiii
Tools Needed .................................................................................................................................................................................xiv
Items Not Included .........................................................................................................................................................................xiv
Check Direction of Gate Swing .......................................................................................................................................................xiv
Mechanical Installation .......................................................................................................................... 1
Assessing the Gate for Installation ...................................................................................................................................................1
Pull-to-Open Operator Mounting (Most Common).............................................................................................................................2
Installing the Closed Position Stop Plate / Pull-to-Open.....................................................................................................................7
Push-to-Open Operator Mounting.....................................................................................................................................................8
Installing the Closed Position Stop Plate / Push-to-Open.................................................................................................................13
Control Box Installation...................................................................................................................................................................14
Connecting the Operator(s) and battery .........................................................................................................................................15
Connecting the Operator(s) and battery .........................................................................................................................................16
Transformer or Solar panel wiring Installation.................................................................................................................................17
Transformer or Solar panel wiring Installation.................................................................................................................................18
Transformer or Solar panel wiring Installation.................................................................................................................................19
Electrical Installation and Setup .......................................................................................................... 19
Dip Switches settings.....................................................................................................................................................................19
Transmitter Programming...............................................................................................................................................................20
Operator Limit Setting ....................................................................................................................................................................21
Auto Close Setting..........................................................................................................................................................................22
Optional Smart Control Setup.............................................................................................................. 22
Connecting Additional Devices ........................................................................................................... 23
Control Board Connections .............................................................................................................................................................24
Connecting Accessories .................................................................................................................................................................25
Troubleshooting Guide - Audible Feedback ....................................................................................... 26
Maintenance ......................................................................................................................................... 26
Troubleshooting Guide - Visual Feedback .......................................................................................... 28
For Your Records.................................................................................................................................. 30
Repair Service ...................................................................................................................................... 31
Accessories .......................................................................................................................................... 32
Appendix A ........................................................................................................................................ 34
Accessory Installation Instructions..................................................................................................................................................34
Gate Operator Installation Checklist ................................................................................................... 35

ii MM371W / MM372W Installation Instructions
BEFORE YOU BEGIN TO INSTALL YOUR AUTOMATIC GATE OPERATOR:
Read these instructions carefully to become familiar with all parts and installation steps.
The video is only designed as an overview of the installation procedure.
You must read the installation manual for detailed instructions
on gate operator safety and proper use of the gate operator.
Please Read This First!
Thank you for purchasing a Mighty Mule Gate Operator—
Nortek Security and Control's "do-it-yourself" automatic
gate operator! When correctly installed and properly used,
your Mighty Mule Gate Operator will give you many years
of reliable service. Please read the following information
to ensure you have the correct system for your particular
needs. If so, this manual and will enable you to properly
install your Mighty Mule Gate Operator.
The Mighty Mule Gate Operator is designed for installation
for single or dual gates. The gate(s) must not exceed 16
feet in length or weigh more than 550 pounds (please see
Technical Specications on page x). The Mighty Mule Gate
Operator can be used on vinyl, aluminum, chain link, farm
tube, and wrought iron gates.
Not rated for use on solid surface gates due to the
potential to damage the operator and/or injure someone.
The Mighty Mule Gate Operator accommodates extra
transmitters, digital keypads, solar panels, push buttons,
automatic gate locks, and other access control products.
These optional accessories (see the Mighty Mule Accessory
Catalog) are available at most stores. Your store should be
able to special order any accessory not in stock.
If your store cannot special order accessories, please call
the Mighty Mule Sales Department (800-543-4283).
The Mighty Mule Gate Operator features Dual Sense
Technology™. This feature makes the gate stop and
reverse direction when it comes in contact with an
obstruction.
The Mighty Mule Gate Operator also has an adjustable
auto-close feature. After the gate reaches the fully open
position, it can be set to remain open up to 120 seconds
before automatically closing. Pressing the transmitter
button at any time after the gate opens fully will cause it
to close immediately. OFF is the factory setting; meaning
the gate will stay open until you press the transmitter (or
keypad, etc.) again.
Visit www.mightymule.com for a retailer near you.
NOT FOR THE CONTAINMENT OF ANIMALS.

MM371W / MM372W Installation Instructions iii
CAUTION
The gate will move freely and uncontrolled when the gate operator is removed from the gate.
ONLY disconnect the operator when the control box power switch is OFF and the gate is NOT moving.
Clevis Pin
Hairpin Clip
Gate Bracket
Front Mount
Because automatic gate operators produce high levels
of force, consumers need to know the potential hazards
associated with improperly designed, installed, and
maintained automated gate operator systems. Keep in
mind that the gate operator is just one component of
the total gate operating system. Each component must
work in unison to provide the end user with convenience,
security, and safety.
This manual contains various safety precautions and
warnings for the installer and end user. Because there are
many possible applications of the gate operator, the safety
precautions and warnings contained in this manual cannot
Disconnecting the Operator
1. Turn control box power switch OFF.
2. Remove the hairpin clip and clevis pin.
3. Remove the operator’s front mount from the gate bracket.
The gate can be opened and closed manually when the operator
is disconnected.
be completely exhaustive in nature. It does, however,
provide an overview of the safe design, installation, and
use of this product. CAREFULLY READ AND FOLLOW ALL
SAFETY PRECAUTIONS, WARNINGS, AND INSTALLATION
INSTRUCTIONS TO ENSURE THE SAFE SYSTEM DESIGN,
INSTALLATION, AND USE OF THIS PRODUCT.
Warnings in this manual are identied with this
warning symbol. The symbol identies conditions that can
result in damage to the operator or its components, serious
injury, or death.
MANUALLY OPENING AND CLOSING GATE
Because Mighty Mule automatic gate operators are only part of the total gate operating system, it is the responsibility
of the installer and end user to ensure that the total system is safe for its intended use.
NOTE: Substitute a Pin Lock for the clevis pin on the front mount of
the gate operator to prevent theft of the operator from the gate (see
accessory pages in back of this book).
Important Safety Information
Part #: FM133

iv MM371W / MM372W Installation Instructions
WARNING
I. Before Installation
1. Verify this operator is proper for the type and size of gate, frequency of use
and class of the gate system.
2. Make sure the gate has been properly installed and swings freely in both
directions. Repair or replace all worn or damaged gate hardware prior to
installation. A freely moving gate will require less force to operate and will
enhance the performance of the entrapment protection devices used with
the system (see page xii).
3. Review the operation of the system to become familiar with its safety
features. Understand how to disconnect the operator for manual gate
operation (see page iii).
4. The gate and operator installation must comply with any applicable local
codes.
5. This gate operator is intended for vehicular gates only. A separate entrance
or gate must be installed for pedestrian use (see page viii).
6. Always keep people and objects away from the gate and its area of travel.
No one should cross the path of a moving gate.
7. Identify all of the entrapment zones for the type of installation. An
entrapment zone is an area around the automatic gate system where
a person or object could be caught that increase the risk of injury.
Entrapment zones should be eliminated, guarded or protected.
8. When designing a system that will be entered from a highway or main
thoroughfare, make sure the gate system is placed far enough from the
road to prevent trafc congestion.
FOR THE INSTALLER AND END USER
Gate in the
Open Position
ZONE 2
ZONE 3
ZONE 4
ZONE 5
Driveway
ZONE 1
Entrapment
Zones for a
Pull-To-Open
Application
MM371W
Gate in the
Open Position
Gate in the
Open Position
ZONE 2
ZONE 3
ZONE 4
ZONE 5
Driveway
MM372W
ZONE 1
ZONE 2
ZONE 4
ZONE 5
ZONE 3
Entrapment Zones
for a Pull-To-Open
Application
1. READ AND FOLLOW ALL INSTRUCTIONS.
2. Never let children operate or play with gate controls. Keep the remote control
away from children.
3. Always keep people and objects away from the gate. NO ONE SHOULD CROSS
THE PATH OF THE MOVING GATE.
4. Test the gate operator monthly. The gate MUST reverse on contact with a
rigid object or stop when an object activates the non-contact sensors. After
adjusting the force or the limit of travel, retest the gate operator. Failure to
adjust and retest the gate operator properly can increase the risk of injury or
death.
5. Use the manual/emergency release only when the gate is not moving.
6. KEEP GATES PROPERLY MAINTAINED. Read the user’s manual. Have
a qualied service person make repairs to gate hardware.
7. The entrance is for vehicles only. Pedestrians must use separate
entrance.
8. The gate must be installed in a location that provides adequate
clearance between it and adjacent structures when opening and
closing to reduce the risk of entrapment. Swinging gates must not
open into public access areas.
9. SAVE THESE INSTRUCTIONS.
To reduce the risk of injury or death:
Important Safety Information

MM371W / MM372W Installation Instructions v
II. During Installation
1. Install the gate operator on the inside of the property and
fence line. DO NOT install an operator on the outside of
the gate where the public has access to it.
2. Be careful with moving parts and avoid close proximity to
areas where ngers or hands could be pinched.
3. Devices such as contact sensors (sensing
edges) and non contact sensors (photo beams) provide
additional protection against vehicular damage.
4. If push buttons or key switches are installed, they should
be within sight of the gate, located at least 10 feet from
any moving part of the gate (see diagram below).
Never install any control device where a user will
be tempted to reach through the gate to activate the
gate operator.
5. Secure outdoor or easily accessed gate operator controls
in order to prohibit unauthorized use of the gate.
FOR THE INSTALLER AND END USER
Typical Entrapment Zones are shown in the diagrams on page iv:
Zone 1 – leading edge of the gate and the fence post.
Zone 2 – between the gate and the gate post.
Zone 3 – the path of the gate.
Zone 4 – the space between the gate in the open position and any object such as a wall, fence, tree, etc.
Zone 5 – pinch points between the operator and gate.
Moving Gate
Area
Driveway
10'
10'
10'
10'
NEVER install any control device
within the indicated area
MM371W
Pull-To-Open Application
Important Safety Information
Pull-To-Open
Application
Moving Gate
Area
Moving Gate
Area
Driveway
10'10'
10'10'
10'10'
NEVER INSTALL
any control device
within the indicated area
MM372W
Pull-To-Open Application

vi MM371W / MM372W Installation Instructions
III. After Installation
1. Attach the warning signs (included) to each side of the
gate to alert the public of automatic gate operation. It is
your responsibility to post warning signs on both sides
of your gate. If any of these signs or warning decals
becomes damaged,
illegible, or missing, replace them immediately.
Contact Nortek Security and Control for free
replacements.
2. The gate is automatic and could move at any time,
posing serious risk of entrapment. No one should be in
contact with the gate when it is
moving or stationary.
3. Do not attempt to drive into the gate area while the gate
is moving; wait until the gate comes to a complete stop.
4. Do not attempt to “beat the gate” while the gate is
closing. This is extremely dangerous.
5. Do not allow children or pets near your gate. Never let
children operate or play with gate controls. Keep the
remote control away from children and unauthorized
users; store controls where children and unauthorized
users do not have access to them.
6. KEEP GATE SYSTEMS MAINTAINED. Always turn power
to operator OFF before performing any maintenance. See
page 28 for maintenance procedures.
7. To operate this equipment safely, YOU must know how to
disconnect the operator for manual gate operation (see
page iii). If you have read the instructions and still do not
understand how to disconnect the operator, contact the
Mighty Mule Service Department.
8. Disconnect the operator ONLY when the power is
TURNED OFF and the gate is NOT moving.
9. Make arrangements with local re and law
enforcement for emergency access.
10. Distribute and discuss copies of the
IMPORTANT SAFETY INFORMATION
section of this manual with all persons
authorized to use your gate.
11. IMPORTANT: Save these safety instructions. Make sure
everyone who is using or will be around the gate and
gate operator are aware of the dangers associated
with automated gate systems. In the event you sell the
property with the gate operator or sell the gate operator,
provide a copy of these safety instructions to the new
owner.
Should you need a replacement manual, a copy can
be obtained by downloading one from the Mighty Mule
web site (www.mightymule.com), by contacting Nortek
Security and Control by calling 1-800-543-4283 and
requesting a duplicate copy.
FOR THE INSTALLER AND END USER
Important Safety Information

MM371W / MM372W Installation Instructions vii
FOR THE INSTALLER AND END USER
Mighty Mule gate operators utilize Dual Sense Technology™
entrapment protection. Dual Sense Technology™is built
into every Mighty Mule and provides redundant methods of
entrapment protection for open and close gate directions.
In addition to Dual Sense Technology, every Mighty Mule
gate controller has provisions for the connection of
additional obstruction detection devices such as sensing
edges and photo beams.
These devices may be located where there is an increased
risk of obstruction. Refer to the diagram below.
One or more edge sensors may be located at the leading
edge, bottom edge, and post edge, both inside and outside
of a vehicular swing gate system.
Wiring to sensors must be located and arranged so the
wiring between the sensor and the gate operator is not
subjected to mechanical damage.
A wireless sensor such as one that transmits radio frequency
(RF) signals that promote safety shall be located where the
transmission of the signals is not obstructed or impeded by
building structures, natural landscaping or similar objects.
Vehicular GateVehicular Gate
Photo Beam
(recommended, not included)
Photo Beam
(recommended, not included)
Sensing Edges
(recommended, not included)
Sensing Edges
(recommended, not included)
Leading Edges
of gates
Gate Warning Sign Gate Warning Sign Control Box
Leading Edge
of the gate
Photo Beam
(recommended, not included)
Photo Beam
(recommended, not included)
Sensing Edges
(recommended, not included)
Vehicular Gate
Gate Warning Sign
Control Box
Entrapment and Obstruction Protection
Mighty Mules’s Dual Sense Technology™provides entrapment protection. Since all installations are different, you may need to add
photo beams or sensing edges to help prevent damage to vehicle or other items that could be hit by a moving gate.
Entrapment Alarm
The Mighty Mule Automatic Gate Operator is designed to stop and reverse the gate when the gate comes in contact with an
obstruction. Additionally, these operators are equipped with an audio entrapment alarm which will activate if the unit obstructs twice
while opening or closing. This alarm will sound for a period of 5 minutes, or until the operator receives an intended signal from a
hard wired entry/exit source (e.g. push button control or keypad). 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.
Important Safety Information
Example of MM372W Installation
(Installations vary slightly on different types of gates)
Example of MM371W Installation
(Installations vary slightly on different types of gates)
NOTE: Photo beams should
always be located on the
non-travel side of the gate.

viii MM371W / MM372W Installation Instructions
Bulldog Pedestrian
Gate Lock
(recommended, not included)
7 foot
minimum
Warning SignPedestrian Gate Warning SignControl Box
Vehicular Gate Vehicular Gate
Warning SignPedestrian Gate
Pedestrian Gate Lock
(recommended, not included)
7 foot
minimum
Control Box
Vehicular Gate
Important Safety Information
Warning signs alert people of automatic gate operation and are required when installing Mighty Mule Automatic Gate
Operators. A minimum of two WARNING SIGNS must be installed in the area of the gate. Each sign is to be visible by
persons located on the side of the gate on which the placard is installed.
The operator is intended for installation only on gates used for vehicles. Pedestrians must be supplied with a separate
access opening. The pedestrian access opening shall be designed to promote pedestrian usage. Locate the gate such that
persons will not come in contact with the vehicular gate during the entire path of travel of the vehicular gate.
We recommend using the Bulldog Pedestrian Gate Lock (Call the Nortek Security and Control Sales Department at 800-543-
4283) for controlled access.
INSTALLING WARNING SIGNS AND PEDESTRIAN GATES
Warning Signs
The gate operator is provided with two safety warning signs (four signs for dual operator installation).
The signs MUST be installed on the front and back of the gate where they will be visible in the area of
the gate.
Permanently secure each warning sign to the gate.
Immediately replace a damaged, eligible or missing warning sign.
Call Customer Service at 800-543-4283 for a free replacement.
!
Example of MM372W Installation
(Installations vary slightly on different types of gates)
Example of MM371W Installation
(Installations vary slightly on different types of gates)

MM371W / MM372W Installation Instructions ix
Product identication label (1) installed on the side of the Control box.
Labels (1) installed on the front of control box
Control arm label (2) installed on operator arm
mightymule.com
MM571W
10019674A
1. KEEP CLEAR! Gate may move at any time.
2. Read all SAFETY INSTRUCTIONS in the user’s manual.
3. Do not allow children to operate gate or play in gate area.
4. This gate is for vehicles only. Pedestrians must use separate entrance.
Moving gate can cause injury or death!
1. TENEZ-VOUS LOIN! La barrière peut se déplacer à tout moment.
2. Lisez toutes les instructions de sécurité dans le manuel de l'utilisateur.
3. Ne laissez pas les enfants utiliser la barrière ou jouer à proximité de la barrière.
4. Cette barrière est uniquement réservée aux véhicules. Les piétons doivent
utiliser une autre entrée.
AVERTISSEMENT
WARNING
La barrière en mouvement peut provoquer des
blessures graves ou la mort!
10019665A
GEN7 SERIES – DC Swing Gate Operator
P/N MM571W
Conforms to UL STD 325 • Certied to CSA STD C22.2 No.247
Maximum Gate: 300 lb. (136 kg); 12 ft. (3.65 m)
Voltage: 12 Vdc; Frequency: 0 Hz; Power: 25 W
Class I Vehicular Gate
S/N: YYYYMMDDx0000
Nortek Security & Control – Carlsbad, CA USA
E472888
Important Safety Information
These warning labels should be found at the locations specied below. If any of them are missing, immediately contact
Nortek Security and Control for replacements.
REQUIRED SAFETY PRECAUTIONS FOR GATES

xMM371W / MM372W Installation Instructions
Technical Specifications
• Low friction screw drive (linear actuator) rated for -5 ºF to +160 ºF (-20 ºC to +71 ºC).
• Opener length with push-pull tube fully retracted is 37.25", mounting point to mounting point. Maximum stroke is 17".
• Maximum opening arc of 110º. Approximate opening time (90º): 14 seconds, depending on weight of gate.
• The system is powered by a 12Vdc automotive or marine battery (not included).
• Battery charge is maintained by Mighty Mule transformer or optional Mighty Mule Solar Panels.
• The system uses 25 A Mini ATC blade-style fuses.
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.
• Adjustable auto-close timer (OFF, 3 to 120 seconds), and Dual Sense Technology Entrapment Protection.
• Accessory terminal block fully compatible with all Mighty Mule access controls.
• Audio entrapment alarm sounds if unit encounters an obstruction twice while opening or closing.
MIGHTY MULE 371W/372W GATE OPENER
NOTE: Ball bearing hinges should be used on all gates weighing over 250 lb.
OPERATIONAL CAPACITY
The Gate Capacity Chart below shows the recommended maximum gate length to weight. The minimum recommended gate length
is 5 ft.
Maximum Weight (lbs.) Maximum Length (ft.)
550 8
500 10
450 12
400 14
350 16

MM371W / MM372W Installation Instructions xi
1. Determine Charging Option for Battery: Transformer OR Solar
IMPORTANT:
●The transformer is designed for indoor use. If the transformer can be plugged only into an outside electrical outlet, a
weatherproof cover/housing (available at local electrical supply stores) must be used.
●If your gate is more than 1000 ft. from an AC power source, you will need to use at least 10 watt solar charging power
to charge the battery [FM123]. Refer to the Solar Panel and Gate Activity chart below.
●All low voltage wire used with the Mighty Mule gate operator must be 16 gauge dual conductor, stranded, direct burial
wire [RB509]. Do not run more than 1000 ft. of wire.
NEVER USE TRANSFORMER AND SOLAR PANEL(S) AT
THE SAME TIME. It will damage the control board.
The table and map illustrate
the maximum number
of gate cycles to expect
per day in a particular
area when using from
10 to 30 watts of solar
charging power prior to the
battery depleting to a state where the unit will
not function. The gures shown are for winter
(minimum sunlight). Accessories connected to
your system will draw additional power from the
battery.
Deep cycle marine battery is recommended for
solar and/or high trafc applications.
Before You Begin
POWERING OPTIONS
SOLAR PANEL AND GATE ACTIVITY CHART
Single Gate Winter Ratings Zone 1 Zone 2 Zone 3
12 v single gate (10 watts) solar charger 816 26
12 v single gate (20 watts) solar charger 14 28 38
12 v single gate (30 watts) solar charger 20 44 54
* Power increments are for reference only.
* If the gate operator controller is OFF, the system will NOT charge the battery.

xii MM371W / MM372W Installation Instructions
E
A
B
C
D
F
Gate Grounding
●For reference only.
Cooper Clad Ground Rod
(not included)
Use an 8 foot, 5/8 inch ground rod,
positioned two feet or less from the
post and 2 inches or less above the
ground. Available at local home center
or hardware stores.
NOTE: No grounding system absolutely
protects against lightning strikes. If
installed correctly, a grounding system
will help minimize damage to your
gate operator.
●The gate must be plumb, level, and swing freely on its hinges.
●The gate must move throughout its arc without binding or dragging on the ground.
●Wheels must NOT be attached to the gate.
●Gates over 250 lb. should have ball bearing hinges with grease ttings.
●Post must be secured in the ground with concrete (minimizes twist/ex when the operator is activated).
●Make sure there is a stable area for mounting the gate bracket (this may require the addition of a horizontal or vertical cross
member).
●We recommend you position the operator near the center-line of a gate to keep the gate from twisting and exing, and to
avoid back-splash from rain.
Copper clad ground rod
(not included)
Ground
Ground
2 Inches or
Less above
ground
Copper ground
rod clamp
Copper Single
Conductor Lug
3/16” Drilled
Pilot Hole
6 ft. deep
or more
Metal gate post
Metal Gate Post
12awg or Larger
Gate Opener
Control Box
2 ft. or Less
from post
IMPORTANT: CHECK FOR PROPER GATE INSTALLATION
CHECK EXISTING GATE SIZE AND MATERIAL
• Gate size: Up to 16 feet and up to 50 lbs. — See
Operational Capacity chart on page x.
Not rated for use on solid surface gates.
• Type of gate material: Vinyl, aluminum, chain link,
farm tube, wrought iron, wood.
A- Level
B
- Plumb
C
- Free Swinging
D
- Secured Posts in
Concrete
E- Center line Mounting
F- Good Working Hinges (ball bearing
hinges are recommended on gates
over 250 pounds)

MM371W / MM372W Installation Instructions xiii
Control Box, Antenna
& Battery Harness
Operator
Arm
Gate Bracket
Post Pivot Bracket Post Brackets (2)
Transformer
Literature kit
with gate
warning signs
Closed Position
Stop Plate
Transmitter
A
F
GI
E
BC
H
D
8” Nylon Cable Tie (10)
J
3/8” Washer (9)
5/16” Clipped Washer (1)
KL
3/8” x 8” Bolt (4)
M
3/8” x 1-1/2” Clevis Pin (2)
2” Mounting Screw (4)
S
R
3/8” Nut (7) 5/16” Lock Nut (1)
U
T
5/16” x 1-1/2” Bolt (1)
Q
W
P
3/8” x 2-3/4” Bolt (2)
3/8” Lock Washer (7)
V
3/8” x 1-1/2” Bolt (1)
Hairpin Clip (2)
#10-14 x 3/4” Screw (8)
NO
3/8” x 1-1/2” Clevis Pin (2)
3/8” x 8” Bolt (4)
8” Nylon Cable Tie (10)
Operator
Arm
Gate Bracket Post Pivot Bracket Post Brackets
Closed Position
Stop Plate
3/8” x 1-1/2” Bolt (1)
5/16” x 1-1/2” Bolt (1)
3/8” Washer (9)
5/16” Washer (1)
3/8” Nut (7) 5/16” Lock Nut (1)
Hairpin Clip (2)
2” Mounting Screw (4)
FG
E
B
H
J K
N
L
QS
O
P
M
R
U
T
3/8” x 2-3/4” Bolt (2)
3/8” Lock Washer (7)
V
ITEMS INCLUDED FOR PRIMARY GATE OPENER INSTALLATION (MM371W)
ITEMS INCLUDED FOR SECONDARY OPENER INSTALLATION (MM372W)

xiv MM371W / MM372W Installation Instructions
7/16” Bit
1/2” Bit
7/32” Bit
Drill
Pliers
Level
Clamps Adjustable
Wrench
Pen Center
Punch
Hammer
Tape
Measure
Small
Flat Head
Philips Head
Screwdriver
Flat Head
Screwdriver
Wire
Stripper
Hack Saw 1/2”
wrench
9/16”
wrench
●Low voltage wire will be needed to run from the
transformer to the control box; length depends
upon the distance between the transformer power
supply and the control box. See Transformer/Solar
and Battery Power Installation on page 16, and
the accessory catalog.
●PVC conduit.
●If you have thin-walled tube or panel gates, see
Reinforcing Gates for the Gate Brackets, next
page.
●Depending on the type of gate, a horizontal cross
member or mounting plate may be needed to
mount the front of the operator and gate bracket to
the gate. See the Reinforcing Gates for the Gate
Brackets examples, next page.
●Surge protection for transformer.
●Some types of installations require u-bolts.
●Additional washers or a metal plate may be
needed for wooden post.
●Weatherproof cover for outdoor outlet and
transformer.
●If the post is larger than 6”, bolts longer than 8”
are needed.
ITEMS NOT INCLUDED
TOOLS NEEDED
CHECK DIRECTION OF GATE SWING
Pull-to-Open Option
Instructions begin on page 2.
Push-to-Open Option
Instructions begin on page 8.
Your Property Your Property
(Requires Push-To-Open Bracket
#FM148—NOT INCLUDED)

MM371W / MM372W Installation Instructions 1
Mechanical Installation
ASSESSING THE GATE FOR INSTALLATION
Your gate operator can be mounted to a variety of gate types. This section shows some of the most common, along with the
reinforcement methods recommended prior to or while mounting your gate operator.
Reinforcing Gates for the Gate Brackets
We recommend using a mufer 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. Additional hardware necessary but not included.
Gate
Bracket
Panel
Gate
1" x 6"
Wood
Reinforcement
Gate Bracket
Wood or Metal
Reinforcement
(not supplied)
Thin Walled
Tube Gate
Gate Bracket
Muffler Clamp
(not supplied)
Mufer Clamp for Gate Bracket
Wood or Metal Reinforcement 1” x 6” Reinforcement

2MM371W / MM372W Installation Instructions
S
E
S
F
B
N
N
!
G
L
O
F
G
V
T
S
FB
S
E
N
!
G
L
O
F
G
T
Minimum 80˚ Open
N
PULL-TO-OPEN OPERATOR MOUNTING (MOST COMMON)
●Assemble the gate post bracket sub
assembly as displayed.
●Attach the gate post bracket
subassembly and gate bracket to the
operator as shown.
Step 1
Step 2
Your Property

MM371W / MM372W Installation Instructions 3
S
FB
S
E
N
!
G
L
O
F
G
T
N
PULL-TO-OPEN OPERATOR MOUNTING
●Disconnect the operator arm from
the gate bracket.
●While supporting the operator,
swing the gate and operator to the
closed position.
●Check for recommended
clearances and binding as shown.
●Ensure that the necessary arm
stroke does not exceed 17 inches.
●Make adjustments to the
mounting brackets to achieve the
recommended clearances.
TIP: Turning the pivot bracket over
gives more hole alignment options
for the gate post pivot bracket
assembly.
●With the gate in the OPEN
position, use clamps to secure
the operator to the gate post and
center cross member of the gate.
●Ensure that the operator is level.
●With the operator arm temporarily
secured to the gate, check
to ensure there is at least 2
inches of clearance between
the operator arm and gate. (See
illustration in Step 4 below).
2" Min. - Pinch-Point Clearance
Top View
2" Min.
17" MAX.
2
1
Closed
Position
Open
Position
Step 3
Step 4
Your Property

4MM371W / MM372W Installation Instructions
M
L
T
V
Q
K
U
●Using a permanent marker, mark the center of
the mounting locations for the gate post bracket
subassembly.
●Remove the operator arm from the gate post and
gate brackets.
●Mark the center of the mounting locations for the
gate bracket.
●Open the gate and reattach the operator to the gate
bracket.
●Ensure that the operator arm is level and the
brackets are securely clamped.
●Secure the post pivot bracket in place by installing
the hardware shown. Tighten both bolts (O and Q).
●Remove the gate post and gate brackets.
●Use a hammer and center punch to mark the center of
the mounting locations.
Step 6
Step 5
Step 7
PULL-TO-OPEN OPERATOR MOUNTING
Your Property