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17. Insert the trolley threaded shaft through the hole in the trolley. Be sure the
belt is not twisted, and the ribbed side faces the rail.
18. Hold the belt at the trolley shaft as you thread the spring nut by hand
(Figure 3) onto the shaft until finger tight against the trolley. Do not use any
tools.
19. Remove the screwdriver.
20. Insert a flathead screwdriver tip into one of the nut ring slots and brace it
firmly against the trolley.
21. Tighten the spring trolley nut with an adjustable wrench or a 7/16" open end
wrench about a quarter turn until the spring releases and snaps the nut ring
against the trolley. This sets the spring to optimum belt tension (Figure 3).
22. Replace the sprocket cover. Refer to your garage door opener manual to
complete the assembly, re-installation and adjustment of your opener. NOTE:
Before hanging the opener, an additional hanging bracket is necessary for
stability.
23. Replace the old emergency release rope with the new, longer replacement
rope.
24. Reconnect power.
25.
Make adjustments and test the safety reversal system according to your
garage door opener manual.
ADDING AN ADDITIONAL HANGING BRACKET:
Cut the enclosed hanging bracket (cross brace) to fit across the installed hanging
brackets. Fasten the cross brace to the top and bottom hole of the hanging brackets
using 5/16" -18x7/8" hex bolts, 5/16 lock washers and 5/16" -18 nuts.
Unfinished Ceiling
Lock Washer 5/16"
Nut 5/16"-18
Lock Washer 5/16"
Nut 5/16"-18
Finished Ceiling
Lock Washer 5/16"
Nut 5/16"-18
Lock Washer 5/16"
Nut 5/16"-18
Hanging Bracket
(Cross Brace)
Bolt 5/16"-18x7/8"
Hanging Bracket
(Cross Brace)
Bolt 5/16"-18x7/8"
Figure 3
Nut Ring
BEFORE
1" (2.5 cm)
To avoid possible SERIOUS INJURY from a falling garage door opener, fasten it
SECURELY to structural supports of the garage. Concrete anchors MUST be
used if installing any brackets into masonry.
Hardware Shown Actual Size
Hex Bolt
5/16"-18x7/8"
Hanging Bracket (Cross Brace) Not shown actual size
REPLACEMENT PARTS
Part No.
Description
041A5250-1
8' (2.4 m) Belt Assembly
041A3021
Rope
004A1008
Master Link Kit
Nut Ring Slot
Spring Trolley Nut
Nut Ring
AFTER
1-1/4" (3.18 cm)
Lock Washer 5/16"
Nut 5/16"-18
Qty
1
1
1
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