Connect Door Arm To Trolley (Sectional Door) - Craftsman 139.18687 Owner's Manual

Installation Step 12
Connect Door Arm to Trolley
Follow instructions which apply to your door
type as illustrated.
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 pulley) for 8" minimum as shown below.
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.
8" MIN.
Trolley
Stop Bolt
Ring
Fastener
Door
Bracket
Clevis Pin
5/16"x1-1/4"
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.
Hardware Shown Actual Size
Nut 5/16"-18 Lock Washer 5/16"
Clevis Pin
5/16"x1-1/4" (Door Bracket)
5/16"x1" (Trolley)
Proceed to Adjustment Step 1, page 28. Trolley will re-engage automatically when the opener is operated.
SECTIONAL Doors Only
Outer
Inner
Trolley
Trolley
Clevis Pin
5/16"x1"
Straight
Door Arm
Curved
Figure 1
Door Arm
Hole Alignment Alternative
Ring Fastener
Clevis Pin Hex Screw
5/16"-18x7/8"
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.
8" MIN.
Trolley
Stop Bolt
Lock
Washers
5/16"
Nuts
5/16"-18
Door Bracket
8" MIN.
Trolley
Stop Bolt
Lock
Washers
5/16"
Nuts
5/16"-18
26
Screws
5/16"-18x7/8"
Figure 2
Screws
5/16"-18x7/8"
Cut This End
Figure 3