Washered
Bolt
5/16"
-
1
8x
1/2"
Lock
N
ut
6
ASSEMBLY STEP 1
Attach the Rail to the Motor Unit
To avoid installation difficulties, do not run the
garage door opener until instructed to do so.
• Remove the bolt and lock nut from the top of the
motor unit.
• Place rail onto the bolt mounted on the motor unit
and align the back hole with the hole in the top of
the unit.
• Fasten rail with the washered bolt and lock nut
previously removed. Tighten securely. (Figure 1)
Remember to use only these bolts/fasteners!
Any other bolts/fasteners will cause serious
damage to the opener.
He
x
Screws
8-
32
x
1"
Chain
Spreader
Motor
U
nit
Sprocket
Washers
To avoid SERIOUS damage to opener, ONLY use
bolts/fasteners, mounted in top of motor unit.
WARNING
CAUTION
WARNING
WARNING
ASSEMBLY STEP 3
Attach the Chassis Support Bracket
• Position the rail support bracket on the unit.
• Attach the bracket to the rail with 1/4"-20x5/8" hex
bolts and lock washers.
Do not overtighten.
• Attach the bracket to the opener by inserting a
5/16"-18x1/2" washered screw through a hole in
each side flange and a matching hole in the
bracket. Complete the connection by inserting the
#8-32x3/8" screw through the back flange and the
hole in rail support (Figure 4).
Proceed to Assembly Step 4.
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.
WARNING
CAUTION
WARNING
WARNING
He
x
Bolts
1/
4
"
-
2
0x
5/
8
"
w/Lock
Washers
Chassis
Support
Bracket
Washered
Bolt
5/16"
-
1
8x
1/2"
Washered
Bolt
5/16"
-
1
8x
1/2"
Screw
#8-
32
x
3/
8
"
Opener
Back
F
lan
g
e
Opener
Side
F
lan
g
e
6
-
Tooth
Sprocket
Chain
Spreader
Motor
U
nit
Mountin
g
Plate
Figure 1
Figure 2
Figure 4
ASSEMBLY STEP 2
Attach the Chain Spreader
• Attach chain spreader to the motor unit with two
screws (Figure 2).
• Guide the chain around the selected groove in the
chain spreader, to engage either the 8-tooth
sprocket or the 6-tooth sprocket (Figure 3).
NOTE:
The 6-tooth sprocket is for use with
Carriage House Doors and the 8-tooth sprocket is
for use with Regular Doors.
8-
Tooth
Sprocket
Chain
Spreader
Motor
U
nit
Mountin
g
Plate
Figure 3
