Sears 139.18847 - Manual (Page 9)

Assembly Step 2
Install the Trolley on the T-rail
• 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.
• 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).
Temporary Stop
Screwdriver
Trolley
TO GARAGE DOOR
The Chamberlain Group, Inc.
Step 2 Install Trolley & Attach Chain Retainer Bracket
Sears Chassis
4/12/92
Trolley
Threaded Shaft
Lock Washer
5/16"
Outer Nut
5/16"
Inner Nut
5/16"
Trolley
Washered Screw
5/16"-18x1/2"
T-rail
(Back Section)
Cover
Protection
Bolt Hole
Nut
5/16"-18
Hex Screw
5/16"-18x7/8"
Lock Washer
5/16"
Use Only This
Type and Size
Screw
9
• Attach the threaded shaft to the trolley with the
lock washer and nuts as shown.
• 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.
If trolley hits against any nuts on the T-rail, the
bolts and nuts were attached from the wrong
side and must be repositioned. Review Step 1.
Temporary Stop
Screwdriver
Trolley
TO GARAGE DOOR
The Chamberlain Group, Inc.
Step 2 Install Trolley & Attach Chain Retainer Bracket
Sears Chassis
4/12/92
Trolley
Threaded Shaft
Lock Washer
5/16"
Outer Nut
5/16"
Inner Nut
5/16"
Trolley
Washered Screw
5/16"-18x1/2"
T-rail
(Back Section)
Cover
Protection
Bolt Hole
Nut
5/16"-18
Hex Screw
5/16"-18x7/8"
Lock Washer
5/16"
Use Only This
Type and Size
Screw
Assembly Step 3
Fasten the T-rail to the Opener
To fasten rail, use only those screws mounted
in the top of the opener. Any other screws will
cause serious damage to the opener.
Lock Washer
5/16"
Nut
5/16"-18
Nut
5/16"-18
Lock Washer
5/16"
Hex Screw
5/16"-18x7/8"
Rondelle-frein
de 5/16 de po
Écrou de
5/16 de po-18
Écrou de
5/16 de po-18
Rondelle-frein
de 5/16 de po
Vis à tête hexagonale
de 5/16 de po-18x7/8 de po
Hardware Shown
Actual Size
Lock Washer
5/16"
Nut
5/16"-18
Nut
5/16"-18
Lock Washer
5/16"
Hex Screw
5/16"-18x7/8"
Rondelle-frein
de 5/16 de po
Écrou de
5/16 de po-18
Écrou de
5/16 de po-18
Rondelle-frein
de 5/16 de po
Vis à tête hexagonale
de 5/16 de po-18x7/8 de po
Hardware Shown Actual Size
WARNING
CAUTION
WARNING
AVERTISSEMENT
ATTENTION
AVERTISSEMENT
WARNING
AVERTISSEMENT