Install Trolley; Fasten T-Rail To Opener - Craftsman 139.18847 Owner's Manual

Step 2 Install Trolley & Attach Chain Retainer Bracket
The Chamberlain Group, Inc.
Assembly Step 2
Sears Chassis
Step 2 Install Trolley & Attach Chain Retainer Bracket
4/12/92
Install the Trolley on the T-rail
Sears Chassis
4/12/92
• Attach the threaded shaft to the trolley with the
lock washer and nuts as shown.
Outer Nut
5/16"
Lock Washer
5/16"
Outer Nut
5/16"
Trolley
Trolley
Temporary Stop
Screwdriver
Temporary Stop
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
5/16"
• Align the holes in the back section of the T-rail with
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"
Threaded Shaft
Inner Nut
Trolley
5/16"
Threaded Shaft
Inner Nut
5/16"
Nut
5/16"-18
Nut Lock Washer
5/16"-18 5/16"
Hardware Shown
Lock Washer
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.
Rondelle-frein
de 5/16 de po
Cover
Protection
T-rail
Bolt Hole
(Back Section)
T-rail
(Back Section)
Lock Washer
5/16"
Nut
5/16"-18
Vis à tête hexagonale
de 5/16 de po-18x7/8 de po
9
Actual Size
Nut
5/16"
5/16"-18
WARNING
Nut Lock Washer
5/16"-18
CAUTION
Washered Screw
5/16"-18x1/2"
Hex Screw
Washered Screw Écrou de
5/16"-18x7/8"
5/16 de po-18 5/16"-18x1/2"
Cover
Protection Hex Screw
5/16"-18x7/8" Bolt Hole
AVERTISSEMENT
Lock Washer
5/16"
Nut
5/16"-18
ATTENTION
Écrou de
5/16 de po-18
Trolley
Rondelle
de 5/16
Trolley
5/16"
Use Only This
Type and Size
Screw
Use Only This
Type and Size
Screw
Rondelle-frein
de 5/16 de po
V
de 5