Replacement Parts - Chamberlain 8810CB Guia De Inicio Rapido

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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 belt cap retainer and complete the re-installation and

adjustment of your opener according to your owner's manual.

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 the

owner's 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

Structural Supports

Hanging Bracket (Cross Brace)

Lock Washer 5/16"

Nut 5/16"-18

Lock Washer 5/16"

Nut 5/16"-18

Finished Ceiling

Hanging Bracket (Cross Brace)

Lock Washer 5/16"

Nut 5/16"-18

Lock Washer 5/16"

Nut 5/16"-18

Hex Bolt 5/16"-18x7/8"

Structural Supports

Hex Bolt 5/16"-18x7/8"

Figure 3

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.