Craftsman 139.53960SRT Manual Del Propietário página 10

ASSEMBLY STEP 4
Install the Chain/Cable
and Attach the Sprocket Cover
1. Pull the cable around the idler pulley and toward
the trolley.
2. Connect the cable loop to the retaining slot on the
trolley, as shown (Figure 1):
• From below, push pins of master link bar up
through cable loop 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 pliers, dispense the
remainder of the cable/chain along the rail
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 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 locking pliers.
9. Align the tabs on the sprocket cover with the
slots in the mounting plate. Squeeze cover and
insert tabs in slots.
Slotted
Figure 2
Hole Sprocket
Cover
Master
Link Bar
Front
Tab Slot
To avoid possible SERIOUS INJURY to fingers from
moving garage door opener:
• ALWAYS keep hand clear of sprocket while operating
• Securely attach sprocket cover BEFORE operating.
Keep Chain and Cable
Taut When Dispensing
Idler
Pulley
Figure 3
Motor Unit
Sprocket
Back
Tab Slot
Mounting
Plate
Figure 4
10
WARNING
CAUTION
opener.
Dispensing Carton
Leave Chain and Cable
Inside Dispensing
Carton to Prevent Kinking.
Master Link
Master
Clip-On Spring Link Cap
Cable
Loop
Slotted
Hole
Master
Cable
Link Bar
Lock
Washer
5/16"
Figure 1
Master Link
Master
Clip-On Spring
Link Cap
Trolley
Pin
Threaded
Notch
Shaft
Master
Round Link Bar
Hole
Trolley
Threaded
Shaft
Inner Nut
5/16"
Trolley
Threaded
Shaft
Round
Hole