Install Trolley; Fasten T-Rail To Opener - Craftsman 139.53662SRT2 Owner's Manual

The Chamberlain Group, Inc.
The Chamberlain Group, Inc.
Step 2 Install Trolley & Attach Chain Retainer Bracket
Step 2 Install Trolley & Attach Chain Retainer Bracket
Assembly Step 2
Sears Chassis
Sears Chassis
Install the Trolley on the T-rail
4/12/92
4/12/92
• Attach the threaded shaft to the trolley with the
lock washer and nuts as shown.
Lock Washer
5/16"
Outer Nut
Outer Nut
5/16"
5/16"
Trolley
Trolley
Temporary Stop
Temporary Stop
Screwdriver
Screwdriver
Assembly Step 3
Fasten the T-rail to the Opener
• Place the opener on packing material to protect
the cover. For convenience, put a support under
the cable pulley bracket.
• Remove the (2) 5/16"-18x1/2" washered screws
mounted in the top of the opener.
Lock Washer
• Align the holes in the back section of the T-rail with
5/16"
the holes in the opener.
• Fasten the rail with the (2) washered screws
previously removed. Tighten securely.
Remember to use only these screws! Any other
screws will cause serious damage to the opener.
• Insert a 5/16"-18x7/8" hex screw into the cover
protection bolt hole in the T-rail as shown. Tighten
securely with a 5/16" lock washer and nut.
NOTE: This screw prevents trolley over-travel.
Keep a 2" minimum between the trolley and this
screw when adjusting travel limits (see page 28).
Hardware Shown Actual Size
Hex Screw
5/16"-18x7/8"
Lock Washer
5/16"
Trolley
Threaded Shaft
Threaded Shaft
Inner Nut
Inner Nut
5/16"
5/16"
Nut
5/16"-18
Lock Washer
Nut
5/16"
5/16"
Hardware Shown
Actual Size
Lock Washer
5/16"
Trolley
• As a temporary stop, insert a screwdriver into the
hole in the front end of the T-rail.
• Slide the trolley assembly along the rail to the
screwdriver stop.
Hex Screw
If trolley hits against any nuts on the T-rail, the
5/16"-18x7/8"
bolts and nuts were attached from the wrong
side and must be repositioned. Review Step 1.
To fasten rail, use only those screws mounted
in the top of the opener. Any other screws will
cause serious damage to the opener.
Washered Screw
5/16"-18x1/2"
Hex Screw
Hex Screw
5/16"-18x7/8"
5/16"-18x7/8"
Cover
Cover
Protection
Protection
Bolt Hole
Bolt Hole
T-rail
T-rail
(Back Section)
(Back Section)
Lock Washer
Lock Washer
5/16"
5/16"
Nut
Nut
5/16"-18
5/16"-18
9
Trolley
Nut
5/16"-18
WARNING
Nut Lock Washer
5/16"
5/16"
CAUTION
Washered Screw
5/16"-18x1/2"
Use Only This
Use Only This
Type and Size
Type and Size
Screw
Trolley
Screw