Craftsman 139.53960SRT Series Garage Door Opener Owner's Manual

Quick guide from the manual

This manual provides instructions for the Craftsman 1/2 HP Garage Door Opener. Before installation, ensure your garage door is balanced, does not bind, and has no ropes or locks attached. The opener requires a 120V, 60Hz grounded outlet. Safety sensors must be installed no higher than 6 inches above the floor to ensure the safety reversal system functions correctly.

Before you begin

• Disable all locks and remove any ropes connected to the garage door.
• Test the door: Lift the door halfway; it should stay in place supported by its springs. If it binds or sticks, call a trained door systems technician.
• Check the floor gap: The gap between the floor and the bottom of the door must not exceed 1/4 inch.

Assembly

The opener is assembled in several steps:

• Rail and Trolley: Assemble the rail sections and install the trolley. Use locking pliers as a temporary stop 8 inches from the idler pulley hole.
• Motor Unit: Fasten the rail to the motor unit using the U-bracket.
• Chain/Cable: Install the idler pulley and thread the chain/cable. Ensure the chain is not twisted and engage it with the sprocket.
• Tension: Tighten the chain until it is approximately 1/2 inch above the base of the rail at its midpoint.

Installation

• Header Bracket: Must be rigidly fastened to structural supports on the header wall or ceiling.
• Opener Positioning: Place the opener on a stepladder. For sectional doors, a 2x4 laid flat is convenient for setting the door-to-rail distance.
• Hanging: Fasten the opener securely to structural supports using hanging brackets.
• Door Control: Install within sight of the door, at least 5 feet above the floor, out of reach of children.
• Safety Sensors: Mount the sending and receiving eyes no higher than 6 inches above the floor. Align them so the invisible light beam is unobstructed.
• Emergency Release: Attach the rope and handle 6 feet above the floor.

Adjustment

• Travel Limits: Regulate the points where the door stops. Increase or decrease UP/DOWN travel using the adjustment screws on the motor unit.
• Force: Adjust the force required to open and close the door. Do not increase force to compensate for a binding door.
• Safety Reversal System: Test monthly by placing a 1-inch board (or 2x4 laid flat) on the floor under the door. The door must reverse upon contact.

Programming

• Remote Controls: Press the 'Learn' button on the motor unit, then press the button on the remote control within 30 seconds.
• Keyless Entry: Press the 'Learn' button, enter a 4-digit PIN on the keypad, and press and hold the ENTER button.

Maintenance

• Monthly: Manually operate the door, check for balance, and test the safety reversal system.
• Twice a Year: Check chain tension.
• Yearly: Oil door rollers, bearings, and hinges.