Chamberlain 1000SDR 1/3 HP Garage Door Opener User Manual


 
Installation Step 13
Connect Door Arm to Trolley
Follow instructions which apply to your door type
as illustrated below and on page 23.
Make sure garage door is fully closed. Pull the emergency release handle to disconnect the outer trolley from the
inner trolley. Slide the outer trolley back (away from the door) about 2" as shown in Figures 1, 2 and 3.
Figure 2:
Bring arm sections together. Find two pairs of holes
that line up and join sections. Select holes as far apart
as possible to increase door arm rigidity.
Ring 
Fastener
Door
Bracket
Straight
Door Arm
Curved
Door Arm
Inner
Trolley
Outer
Trolley
Lock
Washers
5/16"
Nuts
5/16"-18
Door
Bracket
Screws
5/16"-18x7/8"
Cut this end
Manual
Release
Handle
Rope
Lock
Washers
5/16"
Nuts
5/16"-18
Screws
5/16"-18x7/8"
Clevis Pin
5/16"x1"
Clevis Pin
5/16"x1-1/4"
DoorArmTrolleySecScrew
6/96
Ring 
Fastener
Door
Bracket
Straight
Door Arm
Curved
Door Arm
Inner
Trolley
Outer
Trolley
Lock
Washers
5/16"
Nuts
5/16"-18
Door
Bracket
Screws
5/16"-18x7/8"
Cut this end
Manual
Release
Handle
Rope
Lock
Washers
5/16"
Nuts
5/16"-18
Screws
5/16"-18x7/8"
Clevis Pin
5/16"x1"
Clevis Pin
5/16"x1-1/4"
DoorArmTrolleySecScrew
6/96
Figure 3:
If holes in curved arm are
above holes in straight arm,
disconnect straight arm. Cut about 6" from the solid
end. Reconnect to trolley with cut end down as shown.
• Bring arm sections together.
• Find two pairs of holes that line up and join with
screws, lock washers and nuts.
Proceed to Adjustment Step 1, page 24.
Trolley will re-engage automatically when the
opener is operated.
22
Figure 1:
Fasten straight door arm section to outer trolley with
the 5/16"x1" clevis pin. Secure the connection with a
ring fastener.
• Fasten curved section to the door bracket in the same
way, using the 5/16"x1-1/4" clevis pin.
Figure 1
Figure 2
Figure 3
SECTIONAL Doors Only
Lock Washer 5/16"
Nut 5/16"-18
Ring Fastener
Hex Screw
5/16"-18x7/8"
Clevis Pin
5/16"x1" (Trolley)
Clevis Pin
5/16"x1-1/4" (Door Bracket)
Hdw for door EN/FR
Hardware Shown Actual Size
Hole Alignment Alternative