Motor Unit
Sprocket
10
Figure 2
ASSEMBLY STEP 4
Install the Chain/Cable
and Attach the Sprocket Cover
INSTALLING THE CHAIN/CABLE
1. Pull the cable loop from the
carton and fasten it to the
trolley with a master link from
the hardware bag (Figure 1).
• Push pins of master link bar
through cable loop and hole
in front end of trolley.
• 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.
2. With the trolley against the screwdriver, dispense
the cable around the pulley.
3. Continue along the rail and around the motor unit
sprocket (Figure 2). The sprocket teeth must
engage the chain. Continue forward to the trolley
threaded shaft.
4. Use the second master link to connect the chain to
the flat end of the shaft (Figure 1). Check to make
sure the chain is not twisted.
5. Remove the screwdriver.
ATTACHING THE SPROCKET COVER
Insert the back tab in the slot on the back of the
mounting plate. Squeeze the cover slightly and insert
the front tab (Figure 3).
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.
WARNING
CAUTION
WARNING
WARNING
Sprocket
Co
v
er
Mo
u
nting
Plate
Front Ta
b
Slot
Back Ta
b
Slot
Figure 3
Ca
b
le
P
u
lley
Ca
b
le
Loop
Master
Link Bar
Master Link
Clip-On Spring
Trolley
Rail
Pin
Pin
N
otch
Chain
Flat end
of Trolley
Threaded Shaft
Master
Link Cap
Master
Link Cap
Master Link
Clip-On Spring
INSTALL CHAIN & CABLE
IN THIS DIRECTION
Figure 1
Lea
v
e Chain &
Ca
b
le Inside
Dispensing
Carton to
Pre
v
ent Kinking
Keep Chain and Ca
b
le
Ta
u
t
W
hen Dispensing
