Chamberlain 459950 User Manual
26
INSTALLATION STEP 13
Connect Door Arm to the Trolley
Follow instructions which apply to your door type as
illustrated below and on the following page.
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 pulley) about 8" (20 cm) (Figures 1, 2
and 3).
trolley from the inner trolley. Slide the outer trolley back
(away from the pulley) about 8" (20 cm) (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.
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).
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.
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.
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 28. Trolley will
re-engage automatically when opener is operated.
Proceed to Adjustment Step 1, page 28. Trolley will
re-engage automatically when opener is operated.
HARDWARE SHOWN ACTUAL SIZE
Straight
Door
Arm
Door
Arm
Curved
Door
Arm
Door
Arm
(Groove
facing out)
facing out)
Straight
Door
Arm
Door
Arm
Curved
Door
Arm
Door
Arm
CORRECT
INCORRECT
Figure 1
Figure 2
Figure 3
Figure 4
Pulley
Pulley
Pulley
Trolley
Stop Bolt
Stop Bolt
Trolley
Stop Bolt
Stop Bolt
Trolley
Stop Bolt
Stop Bolt
8" (20 cm) min.
8" (20 cm) min.
8" (20 cm) min.
Outer
Trolley
Trolley
Inner
Trolley
Trolley
Clevis Pin
5/16"x1"
5/16"x1"
Ring
Fastener
Fastener
Emergency
Release
Handle
Release
Handle
Curved Door Arm
Door
Bracket
Bracket
Straight
Door Arm
Door Arm
Nuts
5/16"-18
5/16"-18
Nuts
5/16"-18
5/16"-18
Lock
Washers
5/16"
Washers
5/16"
Lock
Washers
5/16"
Washers
5/16"
Lock Washer 5/16"
Bolts
5/16"-18x7/8"
5/16"-18x7/8"
Bolts
5/16"-18x7/8"
5/16"-18x7/8"
Door Bracket
Cut this end
Clevis Pin 5/16"x1-1/4"
Clevis Pin
5/16"x1" (Trolley)
5/16"x1" (Trolley)
Clevis Pin
5/16"x1-1/4" (Door Bracket)
5/16"x1-1/4" (Door Bracket)
Hex Bolt
5/16"-18x7/8"
5/16"-18x7/8"
Nut 5/16"-18
Ring Fastener