Chamberlain 3130M 1/3 HP, 3240M 1/2 HP Figure, Figure, ALL ONE-PIECEDOORS, 2.Adjustment procedures, Figure 6:, 1. Assemble the door arm, Figure 5:, 3.Connect the door arm to the trolley:

ALL ONE-PIECE DOORS1. Assemble the door arm, Figure 5:

IMPORTANT: The groove on the straight door arm MUST face away from the curved door arm (Figure 5).

•Fasten the straight and curved door arm sections together to the longest possible length (with a 2 or 3 hole overlap).

•With the door closed, connect the straight door arm section to the door bracket with the 5/16"x1-1/4" clevis pin.

•Secure with a ring fastener.

2.Adjustment procedures, Figure 6:

•On one-piece doors, before connecting the door arm to the trolley, the travel limits must be adjusted. Limit adjustment screws are located on the left side panel as shown on page 24. Follow adjustment procedures below.

•Open door adjustment: decrease UP travel limit

-Turn the UP limit adjustment screw counterclockwise 4 turns.

-Press the Door Control push button. The trolley will travel to the fully open position.

-Manually raise the door to the open position (parallel to the ﬂoor), and lift the door arm to the trolley. The arm should touch the trolley just in back of the door arm connector hole. Refer to the fully open trolley/door arm positions in the illustration.

If the arm does not extend far enough, adjust the limit further. One full turn equals 2" (5 cm) of trolley travel.

•Closed door adjustment: decrease DOWN travel limit

-Turn the DOWN limit adjustment screw clockwise 4 complete turns.

-Press the Door Control push button. The trolley will travel to the fully closed position.

Figure 6

Inner Trolley

	Outer Trolley
Door Arm Connector Hole
Door Arm
	Emergency
	Release Handle
Closed Door	Inner Trolley
	Inner Trolley

Open Door

Figure 5

CORRECT		INCORRECT
Straight		Straight
Door Arm		Straight
	Curved	Door Arm
	Curved	Curved
(Groove	Door	Door
facing out)	Arm	Arm

Door

Bracket

Ring

Fastener Lock Nuts

Washers 5/16"-18

5/16"

	Clevis Pin	Straight
	5/16"x1-1/4"
		Arm

Bolts

5/16"-18x7/8Curved

Door Arm

-Manually close the door and lift the door arm to the trolley. The arm should touch the trolley just ahead of the door arm connector hole. Refer to the fully closed trolley/door arm positions in the illustration. If the arm is behind the connector hole, adjust the limit further. One full turn equals 2" (5 cm) of trolley travel.

3.Connect the door arm to the trolley:

• Close the door and join the curved arm to the connector hole in the trolley with the remaining clevis pin. It may be necessary to lift the door slightly to make the connection.

• Secure with a ring fastener.

• Run the opener through a complete travel cycle. If the door has a slight "backward" slant in full open position as shown in the illustration, decrease the UP limit until the door is parallel to the ﬂoor.

NOTE: When setting the up limit on the following page, the door should not have a "backward" slant when fully open as illustrated below. A slight backward slant will cause unnecessary bucking and/or jerking operation as the door is being opened or closed from the fully open position.

	Outer Trolley
Correct Angle	Door Arm
	Door Arm
	Connector Hole
	Door with
	Backward Slant (Incorrect)