Master Lock ATS 211 - Manual (Page 20)

Installation Step 12
Connect Door Arm to Trolley
Make sure garage door is fully closed. Pull the manual release handle to disconnect the outer trolley
from the inner trolley. Slide the outer trolley back (away from the door) about 2” as shown in Figures 1,
2 and 3.
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.
Ring
Fastener
Door
Bracket
Clevis Pin
Curved
Door Arm
Straight
Door Arm
Clevis
Pin
Inner Trolley
Outer Trolley
Lock
Washers
5/16"
Nuts
5/16"-18
Door Bracket
Screws
5/16"-18x7/8"
Manual
Release
Handle
Rope
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.
Lock
Washers
5/16"
Nuts
5/16"-18
Screws
5/16"-18x7/8"
Cut This End
Proceed to Adjustment Step 1, page 21. Trolley will re-engage automatically when the opener is operated.
20
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.
Lockwasher 5/16" Nut 5/16"-18 Ring Fastener
Hex Screw
5/16"-18x7/8"
Clevis Pin
5/16" x1"
Hardware Shown Actual Size
Figure 1 Figure 2
Figure 3
Hole Alignment Alternative