Craftsman 139.3043 owner manual Install the Belt

ASSEMBLY STEP 4

Install the Belt

1.Pull the belt around the idler pulley and toward the trolley. The ribbed side must contact the pufley.

2.Hookthe trolley connector into the retaining slot on the trolley as shown.

3.With the trolley against the screwdriver, dispensethe remainder of the belt along the rail length toward the motor

unit and around the sprocket. The sprocket teeth must engage the belt.

4.Checkto make sure the belt is not twisted. Connectthe 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 aresecurely locked in place.

To avoid possible SERIOUSINJURYto fingers from moving garagedoor opener:

•ALWAYS keep hand clear of sprocket while operating opener.

•Securely attach sprocket cover BEFOREoperating.

5.Insert the trolley threaded shaft through the hole in the trolley. Be sure the belt is not twisted.

Trolley Connector

BeltSprocket

Y

Threaded

Shaft

Slot

Trolley

Connector

Idler

Pulley

HARDWARESHOWN ACTUALSIZE

[©

Master Link

Clip-On Spring

Master

Link Cap

	Notch
Trolley	Master
Threaded	Link Bar
Shaft

i i

Master Link

Trolley Threaded Shaft

10