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Control Box
120 Volt indoor
Transformer
(surge protector
not supplied)
Run 1000' (max.) of low
voltage wire to control
box from transformer
(wire not included).
12 Volt automobile or marine
battery in a weatherproof
battery box (not included).
This product meets the requirements of UL325 6th Edition, 2016, the standard for gate
operator safety.
For 24 hour/day, 7 day/week Technical Service visit http://support.gtoinc.com
For more information on Mighty Mule's full line of Automatic Gate Operators and Access Controls visit
Mighty Mule® is the retail brand of GTO Access Systems, LLC
Printed in China for GTO Access Systems, LLC.
Installation Manual
Gate Swings Evenly and Freely
Hung Firmly and Plumb
Receiver
Single Gate Opener
Post Bracket
Power Cable
PVC conduit (not included)
to protect wire from lawn
mowers and weed eaters.
(installations vary slightly on different types of gates)
GTO Sales: 800-543-4283 • Fax 850-575-8912
GTO Technical Service 800-543-1236
3121 Hartsfield Road • Tallahassee, FL 32303
MM660
Gate Bracket
Example of finished installation
www.mightymule.com
Warning Sign
Horizontal Support
Closed Position Stop Plate
Fence Post Set in Concrete
ACCESS SYSTEMS, LLC
Copyright
©
2016 GTO Access Systems, LLC
Document Number: R66008 REV A (12-19.16)

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Do you have a question about the MM660 and is the answer not in the manual?

Questions and answers

Abel Cerda
March 4, 2025

I have the MM660 can I add another 660 to the same controler

Summary of Contents for Mighty Mule MM660

  • Page 1 GTO Technical Service 800-543-1236 For 24 hour/day, 7 day/week Technical Service visit http://support.gtoinc.com For more information on Mighty Mule’s full line of Automatic Gate Operators and Access Controls visit www.mightymule.com Mighty Mule® is the retail brand of GTO Access Systems, LLC 3121 Hartsfield Road •...
  • Page 2 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.
  • Page 3: Table Of Contents

    Table of Contents PLEASE READ THIS FIRST ________________________________________________________ 1 IMPORTANT SAFETY INFORMATION _______________________________________________ 2 TECHNICAL SPECIFICATIONS _____________________________________________________ 9 BEFORE YOU BEGIN ____________________________________________________________ 10 Check Direction of Gate Swing ___________________________________________________ 10 Check Existing Gate Size and Material _____________________________________________ 10 Check for Proper Gate Installation _________________________________________________ 10 Column Installation Information ___________________________________________________ 11 Items Included _________________________________________________________________ 11 Tools Needed _________________________________________________________________ 12...
  • Page 4: Please Read This First

    • Swing gates longer than 18 feet or weighing than 850 pounds (please see Technical Specifications more than 850 pounds on page 9). The Mighty Mule Gate Operator can be • Slide gates used on vinyl, aluminum, chain link, farm tube, and •...
  • Page 5: Important Safety Information

    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.
  • Page 6 Open Position Entrapment Zones for a Push-To-Open Application ZONE 5 ZONE 5 ZONE 3 ZONE 3 ZONE 4 ZONE 4 Entrapment Zones for a Pull-To-Open Application Driveway Driveway ZONE 1 Gate in the ZONE 2 Open Position MM660 Installation Instructions...
  • Page 7 NEVER install NEVER install any control device any control device within gray area within gray area Push-To-Open Pull-To-Open Application Application Moving Gate Area Moving Gate Area Driveway Driveway MM660 Installation Instructions...
  • Page 8 It is your responsibility to post warning disconnect the operator, contact the Mighty Mule signs on both sides of your gate. If any of these Service Department.
  • Page 9 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.
  • Page 10 Installing Warning Signs and Pedestrian Gates 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.
  • Page 11 Voltage: 12 Vdc; Frequency: 0 Hz; Power: 25 W Class I Vehicular Swing Gate Operator. 9901178 MM660-0000000 Serial Number: MMDDYY GTO Access Systems, LLC - Tallahassee, Florida USA Product identification label (1) installed on side of control box. MM660 Installation Instructions...
  • Page 12: Technical Specifications

    • The Gate Capacity Chart shows approximate cycles, per day, you could achieve prior to the battery depleting to a state where the unit will not function. This chart reflects a Mighty Mule Automatic Gate Opener when charging with a transformer.
  • Page 13: Before You Begin

    (not recommended for solid surface gates). IMPORTANT: Check for Proper Gate Installation For the Mighty Mule to work properly, gate must be plumb, level, set in concrete, swing freely and not touching the ground and have good working hinges. A - Level...
  • Page 14: Column Installation Information

    Hairpin Clip (2) 3/8” Washer (9) 3/8” x 2-3/4” Bolt (2) 5/16” x 1-3/4” Bolt (1) 3/8” Nut (7) 5/16” Nut (1) 2” Mounting Screw (5) 3/8” x 1-1/2” Clevis Pin (2) 3/8” x 2” Bolt (1) MM660 Installation Instructions...
  • Page 15: Tools Needed

    • Weatherproof cover for outdoor outlet and power source you will need to use at least one transformer. Mighty Mule® 5 watt solar panel to trickle charge the battery. See the accessory catalog (Do not use • Strain relief bushing for wiring accessory devices to both transformer and solar).
  • Page 16: Gate Opener Installation

    Remove clevis pin from the gate bracket and support loose clearance/binding by inspecting alignment. Arm stroke should opener. be maximum of 20”. TIP: Turning the pivot bracket over gives more hole alignment options for the post pivot bracket assembly. MM660 Installation Instructions...
  • Page 17 Drill 3/8” holes completely through gate post and gate cross Attach post bracket assembly to fence post. NOTE: Must be support. through bolted. MM660 Installation Instructions...
  • Page 18: Closed Position Stop Plate Installation

    • U-bolts—tube and chain link gates (Not included) fasteners. Cut off excess bolt length. • Wood/lag screws—flat aluminum/wood supports (Not included). Return the gate to the full open position and reinstall the Mighty Mule. To complete a pull-to-open installation, proceed to page 19. MM660 Installation Instructions...
  • Page 19: Mounting Push-To-Open Opener To Gate

    Step 7 on the next page, when clearance is OK Remove clevis pin from the gate bracket and support loose in both open and closed positions. TIP: Turning the pivot bracket over opener. gives more hole alignment options for the post pivot bracket assembly. MM660 Installation Instructions...
  • Page 20 Drill holes completely through gate post and gate cross support. Attach post bracket assembly to fence post. NOTE: Must be through bolted. MM660 Installation Instructions...
  • Page 21: Closed Position Stop Plate Installation

    Cut off excess bolt length. • U-bolts—tube and chain link gates (Not included) • Wood/lag screws—flat aluminum/wood supports (Not included). Return the gate to the full closed position and reinstall the Do not tighten. Mighty Mule. MM660 Installation Instructions...
  • Page 22: Control Box Installation

    MASTER OPERATOR CONTROL INPUTS CONTROL OUTPUTS POWER LOCK CONTROL INPUTS INPUT 2ND OPERATOR MASTER OPERATOR GTO 18VOLT TRANSF. OR LOCK SOLAR PANEL MASTER OPERATOR Correct Wrong Wrong Insert 7 wires into corresponding color terminals. Secure wires in terminals. MM660 Installation Instructions...
  • Page 23: Receiver Installation

    • Standard receiver cable length is 10 feet (receivers with a longer cable are available as special order items; call the Mighty Mule Sales Department). NEVER splice receiver cable! • Run the cable through PVC conduit to protect it from damage.
  • Page 24: Connecting The Battery

    NOTE: If OUTLET is OUTSIDE use weatherproof cover. Use only 16 gauge multi-stranded, low voltage, direct burial wire (RB509). NOTE: DO NOT use telephone wire or solid core wire. NEVER splice wires together. We recommend running wire in PVC conduit. MM660 Installation Instructions...
  • Page 25 OR SOLAR Feed 4” of low voltage wire through strain relief with the battery Insert one wire into each 18VAC terminal. The Mighty Mule harness wire into box and tighten strain relief to secure wires. power input is not polarized. The wires can be inserted into either terminal regardless of color.
  • Page 26: Solar Panel Installation

    NOTE: A minimum of 5 watts of solar charging power is required for Mighty Mule single gate systems, with a maximum of 30 watts. A second battery 12V 7Ah, tractor, auto or deep cycle marine battery is recommended for solar and/or high traffic applications, if needed.
  • Page 27 GTO 18VOLT TRANSF. OR SOLAR PANEL Secure with terminal screws. Insert one wire into each 18VAC terminal. The Mighty Mule power input is not polarized. The wires can be inserted into either terminal regardless of color. Multiple Panel Installations Solar Panels connect in PARALLEL...
  • Page 28: Control Box Settings

    OFF position (factory setting). If your gate opens out from the property the DIP Switch must be set to the ON position. NOTE: if you have a Push-to- Open gate application you will need a Push-to-Open bracket (see Push-to-Open Instructions on page 16). MM660 Installation Instructions...
  • Page 29: Setting Pull-To-Open (Closed) Gate Limit

    Press and hold the “LEARN MAST LIMIT” button for Press button on opener remote to open gate. 10 seconds, or until the alarm sounds to clear. Go back to the setting closed limit steps on the top of this page. MM660 Installation Instructions...
  • Page 30: Setting Push-To-Open (Open) Gate Limit

    Hold the “LEARN MAST LIMIT” button for 10 seconds, or un- Press button on opener remote to close gate. til the alarm sounds to clear. Go back to setting open gate limit step 1 at the top of this page. MM660 Installation Instructions...
  • Page 31: Setting Obstruction Stall Force And Auto Close Time

    CAUTION For safety reason the Dual Sense Stall Force setting on the Mighty Mule control board comes from the factory set at MIN (minimum). This setting may need adjustment depending on the size and weight of the gate.
  • Page 32 SLV OPEN DLY. SIMULT. MODE1 MODE2 Go to control box. Press and hold the remote and “LEARN RMT” Replace and secure back cover of the opener remote. buttons simultaneously for 5 seconds or until the alarm sounds. MM660 Installation Instructions...
  • Page 33 This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. MM660 Installation Instructions...
  • Page 34: Connecting Additional Devices

    Input Connections Mighty Mule strongly recommends the use of additional obstruction detection devices however we do not endorse any spe- cific brand names. Only use products that are listed to be in compliance with any applicable UL safety standards and national and regional codes.
  • Page 35: Connecting Accessories

    Push Button Control Mighty Mule Vehicle Sensor Refer to Vehicle Sensor manual for additional connections. Mighty Mule Keypad NOTE: Connections are for typical applications. There may be additional connection options for applications that are not illustrated here. MM660 Installation Instructions...
  • Page 36: Maintenance & Troubleshooting

    Monthly, turn off the power switch and disconnect the Mighty Mule and move the gate to make sure the gate is moving freely without sticking or binding. Lubricate the hinges or repair the gate as required before reattaching the Mighty Mule.
  • Page 37: Troubleshooting Guide

    • Connections to Master Inputs pause and repeats Error • Master Arm Power Cable 3 beeps with 2 seconds, then Master Arm Rev Counter • Connections to Master Inputs pause and repeats Error • Master Arm Power Cable • Rev Counter MM660 Installation Instructions...
  • Page 38 Charge (red) ON or Unit in fast, soak or Battery voltage increasing slowly or stead at aprox 13.8 -14.1. Normal FLASH float charge condition. Charge (red) OFF Battery Not Being AC power Charged Transformer Solar Panel Charging Circuit MM660 Installation Instructions...
  • Page 39 BOLD PRINT on the outside of the package WILL NOT be accepted. Also, items returned to GTO freight collect WILL NOT be accepted. 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 MM660 Installation Instructions...
  • Page 40 Refer to this information when calling GTO for service or assistance with your automatic gate opener. Serial Number ____________________ Date of Purchase ____________________ Place of Purchase ____________________ Remember to keep all receipts for proof of purchase. MM660 Installation Instructions...
  • Page 41 (sold separately). 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 operator from the gate, while allowing quick release of the operator.
  • Page 42 GTO. Any reprinting of GTO publications is by permission only. Copyright infringement is a violation of federal law. Mighty Mule¨, E-Z Gate¨, GTO¨, Dual Sense Technology, Linear PRO Access, are registered trademarks of GTO Access Systems, LLC, America’s DIY Automatic Gate Openers is a trademark of GTO and are the exclusive property of GTO Access Systems, LLC.
  • Page 43: Gate Operator Installation Checklist

    Gate Operator Installation Checklist The gate has been checked to make sure it is level and moves freely in both directions. Potential pinch areas have been guarded so as to be inaccessible OR have sensing edges and/or photo beam obstruction detection devices installed. The installer has installed one or more contact or non-contact obstruction sensing devices, if required for this installation.
  • Page 44 Monday – Friday 8:00 – 5:00 (Eastern Time) A.M. P.M. For technical service Call toll free: 1-800-543-1236 The Mighty Mule Technical Service Department is open Monday – Friday 8:00 – 7:00 (Eastern Time) A.M. P.M. 3121 Hartsfield Road • Tallahassee, Florida, USA 32303...

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