Mighty Mule MM402 - Manual (Page 20)

10 Mighty Mule FM402 Installation Instructions rev 082211
Step 9
Drill 3 / 8 " holes through post as marked. Fasten post bracket assembly
to the fence post using two 3 / 8 " x 8" bolts, washers and lock nuts. You
must use bolts that completely penetrate the post.
Step 10
Drill 3 / 8 " holes through the gate cross member as marked. Mount gate
bracket using two 3 / 8 " x 2 3/4" bolts, washers, and lock nuts.
NOTE: After the gate opener installation is complete and operation
of the opener system has been tested, you should remove excess
bolt length extending beyond the tightened nuts with a hacksaw or bolt
cutters.
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
Gate Bracket Mounting Examples
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
Gate Bracket
Mounting
Examples
Attach Opener Arm
Step 1
Attach the opener
to the securely
bolted post bracket
assembly and gate
bracket using clevis
pins, bushings,
and hairpin clips, or
optional Pin Lock
[FM133] (page
26). Verify that the
opener is level and
adjust the post
bracket assembly, if
necessary.
Step 2
Install the SECOND gate opener and hardware on the second gate following the same procedures as the FIRST gate
opener and hardware ("Installing Post Bracket Assembly and Gate Bracket" Steps 1–10).
NOTE: The power cable for the Second Opener should be run in PVC conduit under the driveway to protect it from
damage due to lawnmowers, heavy equipment, etc. (See illustration on page 6.) NEVER SPLICE opener arm power
cables. This will cause performance problems and may damage the opener.
Level Opener
Gate In Open Position
LEVEL horizontal cross member
Post Bracket Assembly
bolted to fence post
Clevis Pin, Bushing, and Hairpin Clip
Clevis Pin, Washer, and Hairpin Clip
Gate Bracket bolted
to gate cross member
Fence Post