Chamberlain 8808CB Manual

Chamberlain Ikke kategoriseret 8808CB

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Side 1/4

BEFORE YOU BEGIN:

• The trolley must be in down (closed door) position during assembly and

installation. If you have a completely installed garage door opener, the rail/

opener assembly must be taken down. UP and DOWN Limits must be

readjusted after installation.

• Opener hanging brackets will require repositioning and the addition of an

extra bracket for stability due to increased rail length.

IF THIS IS A NEW INSTALLATION:

Use the front (header) rail section, belt assembly, and longer emergency

release rope in this kit in place of those packaged with your garage door

opener. Complete the assembly, installation,and adjustment of your opener

according to your owner’s manual,with the exception of adding an additional

hanging bracket for stability.

IF THIS IS AN EXISTING INSTALLATION, CONTINUE AS FOLLOWS:

1. Pull down on the emergency release handle, then disconnect the trolley

from the door arm.

2. Disconnect the rail/opener assembly from the header bracket and

hanging brackets, and place it on the floor.

3. Remove the belt cap retainer from the opener sprocket and set aside.

4. Disconnect the master link from the trolley threaded shaft and belt;

discard .(Figure 1)

5. Remove the spring/nut from the trolley and discard.

6. Remove idler pulley assembly and set aside.

7. Remove the belt assembly and discard.

8. Push the trolley back toward the opener. Disconnect the front rail

section by using a screwdriver tip to pry up the outer tab on each side of

the rail, then slide it off the center rail. Discard the front rail .(Figure 2)

9. Align the new front rail with the existing rail assembly, keeping the cut

out “window” at the front (header) end. Be sure to keep it right side up:

the idler pulley bolt hole above the window is larger on top of the rail

than on the bottom. Slide the front rail onto the assembly; tabs along

the side will lock into place.

10. As a temporary stop, insert a screwdriver into the hole 10" (25 cm)

from the front end of the rail . Slide the trolley assembly to (Figure 1)

this point.

11. Lay the new belt beside the rail. Grasp the end with the hooked trolley

connector and pass approximately 12" (30 cm) of belt through the

window. Keeping the ribbed side toward the rail, and allow it to hang

while you complete the next two steps.

12. Replace the idler pulley, lock washer and nut. Rotate it to be sure it

spins freely. Grease the center if necessary.

13. Locate the rail tab. Use a flathead screwdriver and lift the rail tab until

the tab is vertical (90°) . (Figure 2)

14. Pull the belt around the idler pulley and hook the trolley connector into

the retaining slot on the trolley . The ribbed side must contact (Figure 1)

the pulley.

15. With the trolley against the screwdriver, dispense the remainder of the

belt along the rail length toward the motor unit and around the sprocket

(Figure 1). The sprocket teeth must engage the belt.

16. Check to make sure the belt is not twisted, then connect it to the flat end

of the trolley threaded shaft with the master link :(Figure 1)

• Push pins of master link bar through holes in end of belt and trolley

threaded shaft.

• Push master link cap over pins and past pin notches.

• Slide clip-on spring over cap and onto pin notches until both pins are

securely locked in place.

To prevent possible SERIOUS INJURY or DEATH:

• Disconnect ALL electric and battery power BEFORE performing ANY

service or maintenance.

Figure 1

Figure 2

The garage door MUST be in the fully closed position during

installation.

To remove rail pry both

end tabs of front

rail slightly outward

Idler Bolt hole

(KEEP LARGER

ONE ON TOP)

NEW

FRONT RAIL

CORRECT

INCORRECT

Rail Tab

Eight-Foot (2.4 m) Rail Extension Kit

Model 8808CB

Threaded

Shaft

Front Rail

Section

Master

Link

Master

Link

Idler Pulley

Trolley

Connector

Retaining

Slot

Retaining

Slot

Trolley

Connector

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) Do not use onto the shaft until finger tight against the trolley.

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.

Figure 3

Nut Ring

BEFORE

1" (2.5 cm)

Nut Ring

AFTER

1-1/4" (3.18 cm)

Nut Ring Slot

Spring Trolley Nut

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.

Lock Washer 5/16"

Nut 5/16"-18

Bolt 5/16"-18x7/8"

Hanging Bracket (Cross Brace)

Lock Washer 5/16"

Nut 5/16"-18

Lock Washer 5/16"

Nut 5/16"-18

Lock Washer 5/16"

Nut 5/16"-18

Bolt 5/16"-18x7/8"

Hanging Bracket (Cross Brace)

REPLACEMENT PARTS

Part No. Description Qty

183C158-14 Header Rail Extension 1

41A5250-1 8' (2.4 m) Belt Assembly 1

41A3021 Rope 1

4A1008 Master Link Kit 1

Hex Bolt

5/16"-18x7/8" Nut 5/16"-18 Lock Washer 5/16"

Hanging Bracket (Cross Brace) Not shown actual size

HARDWARE SHOWN ACTUAL SIZE

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.

Structural Supports

Finished Ceiling

Unfinished Ceiling

Produkt Specifikationer

Mærke:	Chamberlain
Kategori:	Ikke kategoriseret
Model:	8808CB

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