Position The Operator - Chamberlain LiftMaster LA412 Installation Manual

STEP 3

POSITION THE OPERATOR

NOTE: The post bracket assembly can be mounted several places on the
gate post.
1. Open the gate to desired open position (no greater than 100°) and
hold operator against gate.
2. Place the operator arm against gate post at the desired position.
Temporarily secure gate post bracket with clamp. The gate operator
(arm) must be level.
3. Mark mounting holes on gate for reference. Temporarily secure the
gate bracket using a clamp.
4. Align the pull-to-open bracket to a position as CLOSE AS POSSIBLE
above the screwdriver or dowel rod.
5. Insert hex bolt through pull-to-open bracket and post bracket and
secure with washer, lock washer and nut.
TEST GATE TRAVEL
NOTE: If gate does not open and close completely adjust the position of
the gate bracket and mark new mounting holes.
1. Manually open and close the gate.
2. Ensure that the operator does not bind against the pull-to-open
bracket.
3. Ensure that the piston does not bottom out.
INSTALLATION
1
2
3
12
Screwdriver
1/2" (1.3 cm)
Do not allow piston to fully extend or fully retract.
1/2" (1.3 cm)