Sigma ML750 Garage Door Opener User Manual


 
Install the Belt
Remove belt from carton and lay out on floor (do not allow
belt to twist). Hook the trolley connector (6) into the slot (7)
on the trolley (8).
6
ASSEMBLY
5
2
3
4
5
2
1
5
7
6
8
1
2
3
4
5
7
7
Insert Trolley & Idler Pulley Bracket
into Rail
Slide idler pulley bracket (1) and inner trolley (2)
into back (opener) end of rail assembly (3), be
sure to insert idler pulley bracket as shown. Arrow
on trolley (7) must face toward front (header) end
of rail (4). Push idler pulley bracket toward front
(header) end of rail (4). Insert carriage bolt (5) into
bolt cut out in the idler pulley bracket (6).
5
4
6
Assemble the Rail
Grease inside edges of rail sections using grease (1). Place rail pieces (2) on flat surface for assembly. All four rail sections are interchangeable.
Slide rail brace (3) onto rail section. Connect rail by sliding rail brace onto next rail section. Tap rail assembly (4) on piece of wood (5) until rail
sections are flush. Repeat with remaining rail sections.