Craftsman 139.53669SRT Owner's Manual download pdf (Page 9)

Assembly Step 4

Attach the Chain

& Rail Support Bracket

1/4"-20x5/8" Hex Screws

with Lock Washers

Rail Support

Bracket

5/16"-18x1/2"

Washered Screw

5/16"-18x1/2"

Washered Screw

#8-32x3/8"

Screw

Opener

Side Flange

Opener

Back Flange

Sprocket

Chain

Spreader

Opener

To attach the rail support bracket:

• Position the rail support bracket on the opener.

• Attach the bracket to the rail with 1/4"20x5/8" hex

screws and lock washers.

• Attach the bracket to the opener by inserting a

5/16"-18x1/2" washered screw through a hole in

each side flange and a matching hole in the

bracket. Complete the connection by inserting the

#8-32x3/8" screw through the back flange and the

hole in the rail support.

• Remove the chain end from the carton and fasten

it to the trolley with a master link from the

hardware bag. See master link procedure,

Figure 1.

• With the trolley against the screwdriver, dispense

the chain around the pulley.

• Proceed back around the rail to the opener,

Figure 2. Guide the chain around the chain

spreader and sprocket. Be sure sprocket teeth

engage the chain.

• Continue forward to the trolley threaded shaft,

Figure 3.

• Use the second master link to connect the chain

to the flat end of the shaft. If necessary, loosen the

outer nut on the trolley to obtain more chain slack.

Check to make sure the chain is not twisted.

• Remove the screwdriver.

Figure 2

Figure 1

Serious injury can result if fingers become

entangled in moving opener sprocket. Attach

sprocket cover securely. Never operate opener

while your hand is near the opener sprocket.

WARNING

CAUTION

WARNING

AVERTISSEMENT

ATTENTION

AVERTISSEMENT

Washered Screw

5/16"-18x1/2"

Hex Screw

1/4"-20x5/8"

Screw

#8-32x3/8"

Lock Washer

Hardware Shown Actual Size

Chain

Pulley

Bracket

Chain

Master

Link Bar

Trolley

Chain

Rail

Pin Notch

Master Link

Clip-On Spring

Master

Link Cap

Master Link

Clip-On Spring

Master

Link Cap

Install Chain

In This Direction

Flat End

of Trolley

Threaded

Shaft

Figure 3

Master Link Procedure:

Push pins of master link bar through

chain end and hole in front end of

trolley. Push cap over pins and past

notches. Slide clip-on spring over

cap and into notches until both pins

are securely locked.

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Craftsman 139.53669SRT Owner's Manual Page 9

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