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To avoid possible SERIOUS INJURY to fingers from
moving garage door opener:
• ALWAYS keep hand clear of sprocket while operating
opener.
• Securely attach chain spreader BEFORE operating.
Leave Chain and Cable
Inside Dispensing
Carton to Prevent Kinking.
Dispensing Carton
Keep Chain and Cable
Taut When Dispensing
WARNING
CAUTION
WARNING
WARNING
Motor Unit
Sprocket
"U" Bracket
Bolt
Chain
Spreader
Figure 1
Figure 2
Trolley
Threaded
Shaft
Inner Nut
5/16"
Lock
Washer
5/16"
Figure 3
Figure 4
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.
Idler
Pulley
Round
Hole
Master Link
Clip-On Spring
Master
Link Cap
Trolley
Threaded
Shaft
Master
Link Bar
Cable
Link
Cable
Pin
Notch
Master Link
Clip-On Spring
Master
Link Cap
Slotted
Hole
Master
Link Bar
Round
Hole
Trolley
Threaded
Shaft