Craftsman 139.53674SRT Garage Door Opener User Manual


 
Assembly Section: Pages 8- 11
To avoid installation difficulties, do not run the garage door opener until instructed to do so.
Assembly Step I
Assemble the T.rail & Attach
the Cable Pulley Bracket
Alignthe 3 T-rail sections on a fiat surface exactly
as shown. The end'sections are identical. Make
sure the "arrow label" on the center section is
pointingtoward the door.
Insert the carriage bolts so the square bolt necks
seat in the square holes in the T-rail end sections
end pass through the round holes in T-rail center
section. Assemble lock nuts, ensure alignment and
tighten.
If T-rail is not assembled
EXACTLY as shown, trolley I
will not travel smoothly ]
along length of rail or it will
hit againstthe nuts. I Brace
Makesure boltnecks are
seatedIn thesquare _
holesend railsare _ _k A_P'-"-"-'_I'--_
alignedbeforeyou _ _ t
I
.omenlo (Sas __ . | /
iright and wrong views). '_k J '_
iImproper assembly can _
cause]edo/trolley
operation,noise and/or Right Wrong
nuisancedoor reversals.
TRAIL BACK
(TO OPENER)
T.rail
(EndSec_on)
1/4"LockNut
Brace
T-raU
Cab_p._/brackst
attachestoFRONT
ENDofT-ral SquareCarthage
B_tHole=
(TOsoon)
Positionthe cable pufley bracketon the frontend ofthe .
T-r_qas shown. Fasten sscurely with_e hardware.
cab*,Pamy
Brad_
L=_Wuhw
5/16"
s
Hardware Shown Actual Size
©
Lod_Nut CardageSob
114"* 20 x 7116" 1/4" -20 x 1/2"
HexScrow Nut L_:kW_ner
5/16"- 18 x 7/8" 5/16" - 18 5/16"
Q hen tightening
the scraws, be
sure to keep
bracket parallel
to the mllo
Otherwlas, the
railmay bow
when opener is
Right Wrong operated.
8