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Connect door arm to trolley, Installation step 12 – Chamberlain 2580 1/2 HP User Manual

Page 22

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22

INSTALLATION STEP 12

Connect Door Arm to Trolley

Follow instructions which apply to your door type as
illustrated below and on the following page.

SECTIONAL DOORS ONLY

• 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 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 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.

• Figure 3, Hole alignment alternative:

– 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

bolts, lock washers and nuts.

• Proceed to Adjustment Step 1, page 24. Trolley will

re-engage automatically when opener is operated.

Ring
Fastener

Door
Bracket

Clevis Pin
5/16"x1-1/4"

Curved
Door Arm

Straight
Door Arm

Clevis Pin
5/16"x1"

Inner Trolley

Outer Trolley

Lock
Washers
5/16"

Nuts
5/16"-18

Door Bracket

Bolts
5/16"-18x7/8"

Emergency
Release
Handle

Lock
Washers
5/16"

Nuts
5/16"-18

Bolts
5/16"-18x7/8"

Cut This End

Figure 1

Figure 2

Figure 3

Lock Washer 5/16"

Nut 5/16"-18

Ring Fastener

Hex Bolt
5/16"-18x7/8"

Clevis Pin
5/16"x1" (Trolley)

Clevis Pin
5/16"x1-1/4" (Door Bracket)

HARDWARE SHOWN ACTUAL SIZE