Install The Chain/Cable - Craftsman 139.53997D 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
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 2 Chain
Spreader
"U" Bracket /'
Nut
Motor Unit
Sprocket
To avoid possible SERIOUSINJURYto fingers from
moving garage door opener:
• ALWAYSkeep hand clear of sprocket while operating
opener.
• Securely attach chain spreader BEFORE operating.
Dispensing Carton
_nea_eCih_inrandgCable
to Prevent Kinking.
Keep Chain and Cable
Taut When Dispensing
Figure 3
j"
_ Trolley
Threaded
j _ Inner Nut
Shaft
._ Lock 5/16"
Washer
5/16"
Figure 4
Trolley
Threaded
Shaft
Round
Hole
10