Sears 139.53640SRT, 139.53636SRT, 139.53641SRT owner manual Assembly Section Pages 8, Assembly Step

Assembly Section: Pages 8- 11

To avoid installation difficulties, do not run the garage door opener until instructed to do so.

Assembly Step 1

Make sure bolt necks are

seated in the square holes and rails are

Assemble the T=rail & Attach

the Cable Pulley Bracket

aligned before you tighten lock nuts, (See right and wrong views).

Improper assembly can

Align the 3 T-rail sections on a flat surface exactly as shown. The end sections are identical. Make sure the "arrow label" on the center section is

pointing toward the door.

Insert the carriage bolts so the square bolt necks seat in the square holes in the T-rail end sections and pass through the round holes in T-rail center section. Assemble lock nuts, ensure alignment and tighten.

cause jerky trolley			Right	Wrong
operation,	noise	and/or
nuisance	door reversals.
			T-RAIL	BACK
			(TO OPENER)
			T-rait
	1/4"	Lock Nut	(End Section)
			\

@

Brace

T-rail

if T-rail is not assembled			(Center	Section)
EXACTLY		shown, trolley
	as
will not travel		smoothly
along length of rail or it will
hit against	the	nuts.	Brace
		\
		T-rail
	(End Section)			Hardware	Shown Actual	Size
Cable pulley	bracket			©
attaches to	FRONT
END of T-rait		Square	Carriage
		Bolt	Holes
				Lock Nut	Carriage	Botts
				1/4" - 20 x 7/16"	1/4" - 20 x 1/2"
		T-RAIL FRONT
		(TO DOOR)
				Hex Screw	Nut	Lock Washer
Position the cable pulley bracket on the front end of the				5/16" - 18 x 7/8"	5/16" - 18	5/16"
T-rail as shown. Fasten securely with the hardware.

Hex Screws 5/16"-18x7/8"

RightWrong

Lock Washer

When tightening the screws, be sure to keep bracket parallel to the rai!.

Otherwise, the rail may bow when opener is operated.

5/16"