Craftsman 139.53785 Owner's Instructions

CRRFTSHRN ®
OWNER'S INSTRUCTIONS
Model 139.53785
Ten-Foot Rail Extension Kit
Close door end disconnect power to the garage
The tro#ey must be /n down (closed door) posit/on
during asmanibly and Installation. If you have a
completely installed garage door opener, the rail/opener
assembly must be taken down. UP and DOWN Umlte
must be readjusted after installation.
Opener hanging brackets will require reposltioning due to
increased rail length.
ff thl$ Is a new Inatallatlon, replace the front (header)
rail in your opener carton with the longer one in this kit.
Add the center rail in this Idt as the second or third rail,
creating a four rail assembly. Use the belt assembly and
longer emergency release rope in this kit in place of those
packaged with your opener. Complete the assembly,
Installation, and adjustment of your opener according to
your Owner's Manual.
ff thl# Is an existing InatMlatlon, oontinue _ follows:
1. Pull down on the emergency release handle, then
disconnect the trolley from the door arm.
2. Disconnect the rail/opener assembly from the header
bracket and hanging brackets, and place it on the
floor.
3. Remove the bell cap retainer from the opener
sprocket and set aside.
4. Disconnect the master link from the trolley threaded
shaft and belt; discard.
5. Remove the spring/nut from the trolley and dlscerd,
6. Remove idler pulley assembly and set aside.
7. Remove the hall assembly and discard.
8. Remove the 1/4"-20xl-3/4 bolt and lock nut from the
trolley stop hole (see Figure 1) in the front rail and set
aside.
9. Push the trolley beck toward the opener head.
Disconnect the front rail section by using a
screwdriver tip to pry up the outer tab on each side of
the rail, then slide it off the center rail Discard the
front rail
10. Align the new front rail and center rails with the
existing rail assembly, keeping the small holes along
the same edge, and the cut out =window" at the front
(header) end. Be sure to keep rails right side up: the
idler pu/ley bolt hole above the window ls larger on top
of the ra#than on the bottom. SIIde the new nentsr rel!
onto the assembly; then add the front rail. Tabs along
the side will lock into place.
11. As a temporary trolley stop, clamp a locking pliers
onto the rail, 8" from the center of the idler pulley
hole, as shown in Figure 2. Slide the trolley assembly
to this point
12. Lay the new bell beside the rail as shown in Rgurs 3.
Grasp the end with the hooked trolley connector and
Figure 2
RAIL
looking Plkn 8" from
Id_r
Hole
Cut-Out
F/gure 3
3/8" Lock Trolley Idler
Connector Pulley
pass approximately 12" of belt through the window,
keeping the dbbed side toward the rail. Allow it to
hang while you complete the next two steps.
13. Replace the idler pulley, lock washer and nut. Rotate
it to be sure it spins freely. Grease the center if
necessary.
14.Replace the the 1/4"-20xl-3/4 belt and lock nut into
the trolley stop hole.