Sears 139.53930D owner manual Install the Chain/Cable

ASSEMBLY STEP 4

Install the Chain/Cable

1.Pull the cable around the idler pulley and toward the trolley.

2.Connect the cable to the retaining slot on the trolley, as shown (Figure 1):

•From below, push pins of master link bar up through cable link and trolley slot.

•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.

3.With the trolley against the screwdriver, dispense the remainder of the cable/chain along the rail toward the motor unit into the slot on the chain spreader, around the sprocket onto the chain spreader and continuing to the trolley assembly. The sprocket teeth must engage the chain (Figure 2).

4.Check to make sure the chain is not twisted, then connect it to the threaded shaft with the remaining master link.

5.Thread the inner nut and lock washer onto the trolley threaded shaft (Figure 3).

6.Insert the trolley threaded shaft through the hole in the trolley. Be sure the chain is not twisted (Figure 4).

7.Loosely thread the outer nut onto the trolley threaded shaft.

8.Remove the screwdriver.

Figure 4

Trolley

Threaded

Shaft

Round

Hole

To avoid possible SERIOUSINJURYto fingers from moving garage door opener:

•ALWAYSkeep hand clear of sprocket while operating opener.

•Securelyattach chain spreader BEFOREoperating.

Figure 3

._ Lock 5/16" Washer

5/16"