Chamberlain RESIDENTIAL GATE OPERATOR GA420D - Manual (Page 17)

17 Installation
Position Gate Bracket
Hold the gate operator against the gate. The gate operator (arm) must be level. Clamp bracket to gate. Some
installations require a reinforcement be installed on the gate.
Attach Brackets to Gate Operator
Attach post bracket to gate operator using hex head shoulder bolt and lock nut with nylon insert. Attach gate
bracket to operator using release pin and hairpin clip.
6
7
Post Bracket
Hex Head Shoulder Bolt
Lock Nut with
Nylon Insert
Release Pin
Gate Bracket
Hairpin Clip
Piston Range
“After adjustments have been made,
make sure the piston is still within
marked range.”