Mighty Mule FM143 - Manual (Page 6)

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Step 1: With the gate in the closed position, determine the best location for the lock and lock receiver. The lock
and receiver must be level and aligned with the opener. Also, the lock should have a solid surface or
cross member to provide stability.
Step 2: Clamp receiver and lock together (with receiver pin hole and lock slot aligned) to the gates, mark their
positions to drill holes (see Illustration E and F, page 6). The receiver must be mounted on the SLAVE
GATE with carriage bolts, not U-bolts, to allow lock to seat properly.
Step 3: Recheck the lock's position and alignment. Drill the holes on gate supports through the slots in the lock
bracket. U-bolts and saddles can be used to mount the lock on chain link gate supports. Secure the lock
to the MASTER GATE. Install clevis pin and locking cap by placing clevis pin through slots in lock
receiver and hammering the clevis pin into the locking cap (see Illustration G), secure the lock bracket
and check the alignment again.
With the sequencing set correctly follow the steps and diagrams below to mount the lock to the gates.
Lock and receiver must be level and aligned with opener.
Receiver pin hole and lock slot must line up.
Check alignment with pin out of receiver.
MASTER GATE SLAVE GATE
(second gate opener) (first gate opener)