Chamberlain PD220 - Connect Door Arm to Trolley

17
Installation
STEP 9 Connect the door arm to the trolley
IMPORTANT: The groove on the straight door arm MUST face away from the curved door arm.
1. Close the door. Disconnect the trolley bypulling the emergencyrelease handle.
2. Attach the straightdoor arm to the outer trolley using the clevispin. Secure with the ring fastener.
3. Attach the curved door arm to the door bracket using the clevispin. Secure with the ring fastener.
4. Bring arm sections together. Find two pairs of holes that line up and join sections.Selectholes as
far apart as possible to increase door arm rigidityand attach using the bolts and nuts.
5. Pull the emergency release handle toward the garage door opener until the trolley release arm
is horizontal. The trolley will re-engage automatically when the garage door opener isactivated.
HARDWARE
Clevis Pin 5/16"x1" Clevis Pin 5/16"x1-1/4"
Ring Fastener
Hex Bolt 1/4"-20x3/4"
Lock Nut 1/4"-20
Straight
Door Arm
Curved
Door
Arm
(Groove
facing
out)
CORRECT
Straight
Door
Arm
Curved
Door
Arm
INCORRECT
Lock Nut
1/4"-20
Hex Bolt 1/4"-20x3/4"
Clevis Pin 5/16"x1-1/4"
Ring Fastener
Clevis Pin
5/16"x1"