Craftsman 139.53661SRT1 Garage Door Opener User Manual


 
Assembly Step 2
Install the Trolley on the T-rail
Attach the threaded shaft to the trolley with the
lock washer and nuts as shown.
Trolley
LockWasher
5/16"
OuterNut
5/16"_
Tro!ley
Threaded
Shaft
InnerNut
5/16"
Hardware Shown
Actual Size
©©
Lock Washer Nut
5/16" 5/16" - 18
TemporarySlop
Screwdriver
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 reposltioned. Review Step 1.
Assembly Step 3 I
Fasten the T-rail to the Opener
I
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"-18xl/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 intothe cover
protection bolt hole in the T-rail as shown. Tighten
securely with a 5/16" lock washer and nuL
NOTE: This screw prevents trolley over-travel.
Keep a 2" minimum between the trolley and this
screw when adjusting travel limits (see page 28).
WasheredScrew
5/16".18xl/2"
Hex Screw
5/16"-18x7/8"
Cover \
Protection
Bolt Hole \,
T..raJl
(B=ckSection).
5/16"
NUt"
5/16"-18
Hardware Shown Actual Size
5/16" - 18 x 7/8" 5/16; 18 5/16"
9