Installation Instructions

9
Assembly
STEP 4 Install the chain
To avoid possible SERIOUS INJURY to finger from moving garage door opener:
l ALWAYS keep hand clear of sprocketwhile operating opener.
l Securelyattach sprocket cover BEFORE operating.
1. Pull the cable around the idler pulleyand toward the trolley.
2. Connect the cable to the retaining slot on the trolley,as shown.(Figure 1)
a. Push pins of master linkbar through cable linkand trolley slot.
b. Push master linkcap over pins and past pin notches.
c. Slide the closed end of the clip-on spring over one ofthe pins.Push the open end of
the clip-on spring onto the other pin.
3. With the trolley againstthe screwdriver, dispense the remainder of the cable/chain along the
rail toward the motor unit around the sprocketand continuing to the trolleyassembly. The
sprocket teeth mustengage the chain. (Figure 2)
4. Checkto make sure the chain is nottwisted, then connectitto the threaded shaft with the
remaining master link.
5. Thread the inner nut and lockwasher onto the trolley threaded shaft.
6. Insertthe trolleythreaded shaftthrough the hole in the trolley. Be sure the chain is not twisted.
(Figure 3)
7. Looselythread the outer nut onto the trolleythreaded shaft.
8. Remove the screwdriver.
Sprocket
Figure 1
Figure 2
HARDWARE
Master
Link
Threaded Shaft
Threaded
Shaft
Outer Nut
Inner Nut
Lock Washer
Master Link
Master
Link
Figure 3
a.
b.
c.