Mighty Mule MM402 - Manual (Page 5)

rev 082211 Mighty Mule FM402 Installation Instructions iii
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.
How To Manually Open and Close the Gate:
CAUTION: The gate can be opened and closed manually when the opener is disconnected.
ONLY disconnect the opener when the opener power switch is OFF and the gate is NOT moving.
Disconnecting the Opener
1. Turn opener power switch (Control Box) OFF.
2. Remove hairpin clip, clevis pin, and bushing from both
the front and rear mounting points.
3. Remove the opener from the mount.
IMPORTANT: NEVER allow opener arm to hang
by the front or rear mount — it will break from
the arm weight.
CAUTION: Because the Mighty Mule gate opener is battery powered, disconnect the opener ONLY
when the power switch on the contol box is turned OFF. Unplugging the transformer does not turn power to
the opener OFF.
NOTE: Substitute a Pin Lock [FM133] for the clevis pin on the front
mount of the gate opener to prevent unauthorized removal of the opener
from the gate (page 26).
Clevis
Pin
Hairpin Clip
Gate Bracket
Front Mount
Bushing