6
ASSEMBLY STEP 1
Attach the Rail to the Motor Unit
To avoid installation diffi culties, 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.
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.
To avoid SERIOUS damage to opener, ONLY use
bolts/fasteners mounted in the top of the opener.
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 fl ange and a matching hole in the bracket.
Complete the connection by inserting the #8-32x3/8"
screw through the back fl ange and the hole in rail
support (Figure 4).
Proceed to Assembly Step 4.
To avoid possible SERIOUS INJURY to fi ngers from
moving garage door opener:
• ALWAYS keep hand clear of sprocket while operating
opener.
• Securely attach chain spreader BEFORE operating.
Figure 1
Figure 2
Figure 4
Figure 3
Chain Spreader
Chain Spreader
8-Tooth
Sprocket
Screw #8-32x3/8"
Washered Bolt
5/16"-18x1/2"
Opener Back
Flange
Opener Side
Flange
Chassis
Support
Bracket
Washered Bolt
5/16"-18x1/2"
Hex Bolts 1/4"-20x5/8"
with Lock Washers
6-Tooth
Sprocket
Motor Unit Mounting Plate
Motor Unit Mounting Plate
Washered Bolt
5/16"-18x1/2"
Lock
Nut
Hex Screws
8-32x1"
Chain
Spreader
Washers
Motor Unit
Sprocket