Connect Door Arm To Trolley - Chamberlain 1345M Owner's Manual

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.
• 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" 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.
• Proceed to Adjustment Step 1, page 28. Trolley will re-
engage automatically when opener is operated.
HARDWARE SHOWN ACTUAL SIZE
Nut 5/16"-18 Lock Washer 5/16"
Clevis Pin
5/16"x1" (Trolley)
Ring Fastener
Clevis Pin Hex Bolt
5/16"x1-1/4" (Door Bracket) 5/16"-18x7/8"
Outer Trolley
Ring
Fastener
Door
Bracket
Clevis Pin
5/16"x1-1/4"
Figure 1
Lock
Washers
5/16"
Nuts
5/16"-18
Door Bracket
Figure 2
Lock
Washers
5/16"
Nuts
5/16"-18
Figure 3
26
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