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Washered Bolt
5/16"-18x1/2"
Lock Nut
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.
Hex Screws
8-32x1"
Chain
Spreader
Motor Unit
Sprocket
Washers
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 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.
Hex Bolts 1/4"-20x5/8"
w/Lock Washers
Chassis
Support
Bracket
Washered Bolt
5/16"-18x1/2"
Washered Bolt
5/16"-18x1/2"
Screw
#8-32x3/8"
Opener
Back Flange
Opener
Side Flange
6-Tooth
Sprocket
Chain Spreader
Motor Unit
Mounting 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 Unit
Mounting Plate
Figure 3