Install The Chain/Cable - Craftsman 139.30437 Owner's Manual

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 length toward the
motor unit and around the sprocket. The sprocket teeth must
engage the chain (Figure 2).
4. Check to make sure the chain is not twisted, then connect it to
the trolley threaded shaft with the remaining master link.
5. Thread the inner nut and lock washer onto the trolley threaded
shaft.
6. Insert the trolley threaded shaft through the hole in the trolley.
Be sure the chain is not twisted (Figure 3).
7. Loosely thread the outer nut onto the trolley threaded shaft.
8. Remove the screwdriver.
Figure 1
HARDWARE SHOWN ACTUAL SIZE
Trolley Threaded Shaft
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.
Dispensing Carton
Keep Chain and Cable
Taut When Dispensing
Figure 2
Figure 3
Lock Washer
Outer Nut
Master Link
10
Leave Chain and Cable
Inside Dispensing
Carton to Prevent Kinking.
Sprocket
Master Link
Inner Nut
Master Link
Threaded Shaft
Nut 5/16"-18
Lock Washer 5/16"