Connect Door Arm To Trolley (Sectional Door); Connect Door Arm To Trolley (One-Piece Door) - Craftsman 139.18867 Owner's Manual

Installation Step 13
Connect Door Arm to Trolley
Follow instructions which apply to your door type
as illustrated below and on page 27.
The Chamberlain Group, Inc.
Make sure garage door is fully closed. Pull the emergency release handle to disconnect the outer trolley from the
Step 12 Connect Door Arm to Trolley Sectional
inner trolley. Slide the outer trolley back (away from the door) about 2" as shown in Figures 1, 2 and 3.
Liftmaster Screw Drive #114A1794
6/3/94, 6/15/94
Figure 1:
• Fasten straight door arm section to outer trolley with a
clevis pin. Secure the connection with a ring fastener.
• Fasten curved section to the door bracket in the same
way as shown.
Figure 1
Clevis Pin
Hole Alignment Alternative
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.
Figure 3
Nuts
5/16"-18
SECTIONAL Doors Only
Inner Outer
Trolley
Trolley
Clevis
Ring
Pin
Fastener
Straight
Door
Door Arm
Bracket
Curved
Door Arm
Lock
Washers
5/16"
Screws
5/16"-18x7/8"
Cut this end
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 2
Nuts
5/16"-18
Hardware Shown Actual Size
Nut 5/16" - 18
Hex Screw
5/16"- 18 x 7/8"
Proceed to Adjustment Step 1, page 28.
Trolley will re-engage automatically when the
opener is operated.
Écrou 5/16 pouce-18
26
Vis à tête hexagonale
5/16 pouce-18x7/8 pouce
Lock
Washers
5/16"
Screws
5/16"-18x7/8"
Door
Bracket
Ring Fastener
Lockwasher 5/16"
Clevis Pin
5/16" x 1"
Anneau d'arrêt
Rondelle-frein 5/16 po
Axe de chape
5/16 po x 1 pouce
Rope
Emergency
Release
Handle