Attach Opener Arm - Nortek Security & Control Mighty Mule HD272 Installation Manual

Step 5
Be sure the position of the gate opener and brackets
allows for 1" of clearance between the gate and the
opener in both the open and closed position, while
at the same time maintaining a stroke distance of 7"
to 13" from center of hole in the end of the retracted
opener arm to the center of the hole in the gate bracket
with the gate in the closed position. This mounting
position will give the opener the most efficient
leverage point for operation and provides the least
possible pinch area.
Step 6
After verifying that you have the best position for
the post pivot bracket in the open position, insert the
5 1
/ " x 1 / " bolt through the aligned holes of the
16 4
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. Again, check
the clearance and be sure that the gate opener is not
binding at the post pivot bracket.
If you don't have the required clearance, or if the gate
opener is binding on the post pivot bracket, remove the
5 / " x 1 1 / " bolt and readjust the post pivot bracket.
16 4
Reinstall the bolt and related hardware as shown in the
diagram to the right.
TIP: Turn the post pivot bracket over for more hole
alignment options. You can also move the entire post
bracket assembly to different positions on the post.
If you are mounting to a post or column larger than
8" or you can not achieve the mentioned clearances,
you can:
1) eliminate the post pivot to try and achieve the proper clearances.
2) install the unit as a push to open (bracket not included).
3) re-hang the gate within 4" inches of the back corner of the column.
NOTE: Re-hanging the gate, depending on the construction of a column, may
require additional expertise and tools/materials.
Step 7
When the post bracket assembly is in the optimum position, reattach the opener to
the gate bracket (gate in the open position); recheck the gate opener level; make sure
the brackets are clamped securely.
Step 8
Mark reference points for bolt holes on the post through
middle of post bracket assembly slots. Mark reference points
for bolt holes on the gate cross member through middle
of gate bracket slots. After marking your reference points,
remove the opener and brackets from the fence and gate.
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HD272 Installation Instructions
Gate in the
CLOSED POSITION
1" minimum
Pinch Area
7" to 13"
stroke
Be sure gate opener
and bracket don't bind.
Pinch Area
Gate in the
OPEN POSITION
1" minimum
Determine Best
5 / " x 1 1 / "
16 2
Hole Alignment
Bolt
to Achieve
1" Clearance
Post Pivot
Bracket
Post Bracket
5
/ " Washer
16
5 / " Lock Nut
16
Mark fence post through
middle of bracket slots
and drill 3 / " holes through
8
post.
Post Bracket
Assembly
Gate In Open Position
Arm Fully Retracted
Mark cross member through middle of gate
bracket slots and drill 3 / " holes through cross member.
8
Step 9
3
Drill / 8 " holes through post as marked. Fasten post bracket assembly to the
3 " x 8" bolts, washers, lock washers and nuts. You
fence post using two / 8
must use bolts that completely penetrate the post.
Step 10
3
Drill / " holes through the gate cross member as marked. Mount gate
8
3 3
bracket using two / " x 2 / " bolts, washers, lock washers and nuts.
8 4
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.
Gate Bracket Mounting Examples
FRONT VIEW SIDE VIEW FRONT VIEW
Round Tube & Chain Link Gate
Square Tube Gate

Attach Opener Arm

Step 1
Post Bracket Assembly
bolted to fence post
Attach the opener to the
securely bolted post bracket
assembly and gate bracket
Level Opener
using clevis pins, bushings,
and hairpin clips, or optional
Pin Lock [FM133] (page 28).
Verify that the opener is level
and adjust the post bracket
assembly, if necessary.
Clevis Pin, Washer, and Hairpin Clip
Fence Post
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 lawn mowers, heavy equipment, etc. (See illustration on page
performance problems and may damage the opener.
EXAMPLES
TOP VIEW
Post Bracket
Mounting
Examples
Round Metal Post
Square Metal Post
SIDE VIEW
Square Wood Post
Remove excess bolt length
Round Wood Post
with hacksaw or bolt cutters
SIDE VIEW
Mounting Plate
Created for
Decorative Gate
(required but not
supplied)
Remove excess bolt length
with hacksaw or bolt cutters
Gate Bracket bolted
to gate cross member
Clevis Pin, Bushing, and Hairpin Clip
Gate In Open Position
6.) NEVER SPLICE opener arm power cables. This will cause
HD272 Installation Instructions
10