Chamberlain GA400D User Manual

This operator comes with the hardware to install on a gate that 

pulls-to-open. If your application requires the gate to be 

pushed open, accessory kit 919GA is required.

Introduction 6

NOTE: Hardware quantities shown below are for GA400D. Quantities are doubled for GA420D.

KEEP CLEAR! Gate may move at any
time without prior warning.

Do not let children operate the gate or
play in the gate area.

This entrance is for vehicles only
Pedestrians must use separate entrance

Extension Bracket 
Model GA400D (1)
Model GA420D (2)

Control Box (1) with: 
 1 Battery (GA400D) 
 2 Batteries (GA420D)

Gate Operator
Model GA400D (1)
Model GA420D (2)

Watertight Connector
Model GA420D ONLY

Extension Cable
Model GA420D ONLY

Arm End Cap
Model GA400D (1)
Model GA420D (2)

Gate Bracket
 Model GA400D (1)
Model GA420D (2)

Post Bracket
Model GA400D (1)
Model GA420D (2)

Plug-In Transformer (1)

Cable Ties (4)

Warning Signs (2)

Installation DVD

SECURITY✚

®

3-Button Remote Control (1)

Wire Nuts (6)
Model GA420D ONLY

Flange Nut 5/16"-18 (1)

Flange Nut 3/8"-16 (1)

Ribbed Neck Bolt
3/8"-16x1-1/2" (1)

Ribbed Neck Bolt
5/16"-18x1-1/2" (1)

Carriage Bolt 3/8"-16x6" (2)

Lock Nut With
Nylon Insert (1)

Hex Head  Shoulder 
Bolt (1)

Release Pin (1)

Flat Washer 3/8" (2)

Lock Washer 3/8" (2)

Hex Nut 3/8"-16 (2)

Hairpin Clip (1)