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Connect door arm to trolley, Sectional doors only, Installation step 13 – Chamberlain SECURITY 4620 User Manual

Page 26: Doorarmtrolleysecscrew 6/96, Hole alignment alternative

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Installation Step 13

Connect Door Arm to Trolley

Follow instructions which apply to your door type
as illustrated below and on page 27.

Make sure garage door is fully closed. Pull the manual 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

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 28.
Trolley will re-engage automatically when the
opener is operated.

26

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

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