Chamberlain LiftMaster SECURITY+ 3585S Owner's Manual page 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" (5 cm) 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.
IMPORTANT: The groove on the straight door arm MUST
face away from the curved door arm (Figure 4).
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" (15 cm) 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.
Pull the emergency release handle toward the opener at
a 45° angle so that the trolley release arm is horizontal.
Proceed to Adjustment Step 1, page 24. Trolley will
re-engage automatically when opener is operated.
HARDWARE SHOWN ACTUAL SIZE
Ring Fastener
Nut 5/16"-18
Clevis Pin
5/16"x1-1/4" (Door Bracket)
Clevis Pin
5/16"x1" (Trolley)
Lock Washer 5/16"
Hex Bolt
5/16"-18x7/8"
22
Outer Trolley
Ring
Fastener
Door
Bracket
Figure 1
Clevis Pin 5/16"x1-1/4"
Lock
Washers
5/16"
Nuts
5/16"-18
Door Bracket
Figure 2
Lock
Washers
5/16"
Nuts
5/16"-18
Figure 3
CORRECT
Straight
Door
Curved
Arm
Door
Arm
(Groove
facing out)
Figure 4
Inner Trolley
Clevis Pin
5/16"x1"
Straight
Door Arm
Curved Door Arm
Emergency
Release
Handle
Bolts
5/16"-18x7/8"
Bolts
5/16"-18x7/8"
Cut this end
INCORRECT
Straight
Door
Arm
Curved
Door
Arm