Craftsman 139.53918D Owner's Manual page 25

INSTALLATION STEP 13
ConnectDoorArm to Trolley
Follow instructions which apply to your door type as illustrated
below and on the following page.
SECTIONAL DOORSONLY
Make sure garage door is fully closed. Pull the emergency release
handle to disconnect the outer trolley from the inner trolley. Slide
the outer trolley back (away from the pulley) about 8" (20 cm) as
shown in Figures 1, 2 and 3.
Figure 1:
• Fastenstraight door arm section to outer trolley with the
5/16"x1" clevis pin. Secure the connection with a ring fastener.
• Fastencurved section to the door bracket in the same way,
using the 5/16"x1-1/4" clevis pin.
IMPORTANT'. T hegroove on the straight door arm MUST face
away from the curved door arm (Figure 4).
Figure 2:
• Bring arm sections together. Find two pairs of holes that line up
and join sections. Select holes as far apart as possible to
increase door arm rigidity.
Figure 3, Hole alignment alternative:
• If holes in curved arm are above holes in straight arm,
disconnect straight arm. Cut about 6" (15 cm) from the solid
end. Reconnect to trolley with cut end down as shown.
• Bring arm sections together.
• Find two pairs of holes that line up and join with bolts, lock
washers and nuts.
Pull the emergency releasehandle toward the opener at a 45°
angle so that the trolley releasearm is horizontal. Proceedto
Adjustment Step 1, page 27. Trolley will re-engage automatically
when opener is operated.
HARDWARESHOWN ACTUALSIZE
o Qo
Nut 5/16"-18 Lock Washer 5/16" Ring Fastener
on
Clevis Pin Clevis Pin
5/16"x1" (Trolley) 5/16"x1-1/4" (Door Bracket)
Hex Bolt
5/16"-18x7/8"
Figure
Figure 2
Figure 3
Figure 4
(
Pulley
/i._8"(20°m)
Ring
Fastener
/
O Door
Bracket
Cuwed DoorArm
Clevis Pin 5/16"x1-1/4"
Pulley
i-- 8"(20 cm) min. i
Lock t
Washers/(
5/16"
/oo]
_ult_._1 , /o/
Door Bracket
J
_ Bolts
5/16"-18x7/8"
Pulley
i " (20 cm) min. ,
Nuts / /o7'
5/16"-1_._/_
v Cut this end
Door Arm
(Groove
facing out)
CORRECT INCORRECT
25