Craftsman 139.53919 Manuel du propriétaire télécharger pdf (Page 10)

ASSEMBLY STEP 4

Install the Belt and Attach the

Belt Cap Retainer

1. Pull the belt around the idler pulley and toward the

trolley. The ribbed side must contact the pulley.

2. Hook the trolley connector into the retaining slot on

the trolley, as shown.

3. With the trolley against the screwdriver, dispense the

remainder of the belt along the rail length toward the

motor unit and around the sprocket. The sprocket

teeth must engage the belt.

4. Check to make sure the belt is not twisted and the

FLAT side of the trolley threaded shaft is facing the

rail. Connect the trolley threaded shaft with the master

link, as illustrated:

• 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.

5. Insert the trolley threaded shaft through the hole in

the trolley. Be sure the belt is not twisted, and the

FLAT side of the trolley threaded shaft faces the rail.

6. Hold the belt at the trolley shaft as you thread the

spring nut by hand onto the shaft until finger tight

against the trolley. Do not use any tools.

7. Remove the screwdriver.

8. Position the belt cap retainer over the motor unit

sprocket as shown and fasten to the mounting plate

with 8x3/8" hex screws provided.

To avoid possible SERIOUS INJURY to fingers from moving

garage door opener:

• ALWAYS keep hand clear of sprocket while operating

opener.

• Securely attach sprocket cover BEFORE operating.

WARNING

CAUTION

WARNING

Hex Screw 8x3/8"

HARDWARE SHOWN ACTUAL SIZE

Spring/Trolley Nut

Spring Nut

Hex Screws

8x3/8"

Belt Cap

Retainer

Motor Unit

Sprocket

Mounting

Plate

Trolley

Connector

Idler Pulley

Retaining

Slot

Hole

Master Link

Clip-On Spring

Master Link Cap

Trolley

Threaded

Shaft

Master

Link Bar

Notch

1 2 ... 5 6 7 8 9 10 11 12 13 14 15 ... 79 80

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Craftsman 139.53919 Manuel du propriétaire Page 10

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