Assembly; Attach The Rail To The Motor Unit; Attach The Chain Spreader; Attach Chassis Support Bracket - Chamberlain 3595S 3/4 HP Owner's Manual

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.
Figure 3
Chain Spreader
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.
6-Tooth
Sprocket
Motor Unit Mounting Plate
To avoid SERIOUS damage to opener, ONLY use
bolts/fasteners mounted in the top of the opener.
Figure 1
Lock
Nut
Figure 2
Chain Spreader
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 4
Hex Bolts 1/4"-20x5/8"
with Lock Washers
Washered Bolt
5/16"-18x1/2"
Chassis
Support
Bracket
6
Washered Bolt
5/16"-18x1/2"
Hex Screws
8-32x1"
Washers
8-Tooth
Sprocket
Motor Unit Mounting Plate
Screw #8-32x3/8"
Washered Bolt
5/16"-18x1/2"
Opener Back
Flange
Opener Side
Flange
Chain
Spreader
Motor Unit
Sprocket