Connect The Door Arm To The Trolley; Important - LiftMaster 8550C Mode D'emploi

9 Connect the door arm to the trolley

IMPORTANT: The groove on the straight door arm MUST face away from the curved door arm.
CORRECT
Straight
INCORRECT
Door Arm
Curved
(Groove
Door
facing out) Arm
Straight
Door
Arm
Curved
Door
Arm
HARDWARE
H2 (2)
Hex Bolt 5/16"-18x7/8"
H7
Clevis Pin
5/16"x1"
H8 (2)
Nut
5/16"-18
H11 (2)
Ring Fastener
H9 (2)
Lock
H6
Washer
5/16" -16 Clevis Pin 5/16"x1-1/4"
9.1
Close the door. Disconnect the trolley by
pulling the emergency release handle.
Slide the outer trolley back (away from
the door) about 2" (5 cm).
9.4
Align the straight door arm with the
curved door arm. Select two aligned
holes (as far apart as possible) and
attach using the bolts (H2), nuts (H8)
and lock washers (H9).
H8
H9
H2
9.2
Attach the straight door arm to the outer
trolley using the clevis pin (H7). Attach
with the ring fastener (H11).
H7
H11
NOTE: If the holes do not line up, reverse the
straight door arm. Select two aligned holes (as
far apart as possible) and attach using the bolts
(H2), nuts (H8) and lock washers (H9).
.
H8
H9
H2
If the straight door arm is hanging
down too far, you may cut 6 inches
(15 cm) from the solid end.
13
9.3
Attach the curved door arm to the door
bracket using the clevis pin (H6).
Attach with the ring fastener (H11).
H11
H6
9.5
Pull the emergency release handle
toward the garage door opener until the
trolley release arm is horizontal. The
trolley will re-engage automatically when
the garage door opener is activated.
Trolley
release arm