UDI U818A Carbon Tube and Tooth Gears Replacement

Remove the 5 mm screws connecting each propeller to the rotating post using a Phillips #000 screwdriver.

Remove four 3 mm screws connecting the electronics to the frame using a Phillips #000 screwdriver.

Pull the two LED bars through the dust cover and remove the thin plastic dust cover from the drone.

Remove the single 5 mm screw from the head lamp using a Phillips #000 screwdriver.

Remove the head lamp from the rest of the drone.

Disconnect the electronics from the frame of the drone by pulling each arm out of the hole in the frame holding it in place.

If present, remove the white tape over the black and red wires on the head lamp with a spudger.

Separate the plastic tabs securing the motor arms to the drone cover and delicately pull out the arm. Do this for all four arms to remove the frame from the cover.

Remove four 5 mm corner screws that secure both the receiving board and the motor arm using a Phillips #000 screwdriver.

Carefully slide the arm out from the socket.

Use a nylon spudger to remove the connectors from the receiving board.

The Front Left motor identified by the Red/Blue wires is a Standard(Clockwise) spinning motor, it pairs with a White A2 propeller.

The Front Right motor identified by the Black/White wires is a Reverse(CounterClockwise) spinning motor, it pairs with a White B2 propeller.

The Back Left motor identified by the Black/White wires is a Reverse(CounterClockwise) spinning motor, it pairs with a Black B1 propeller.

The Back Right motor identified by the Red/Blue wires is a Standard(Clockwise) spinning motor, it pairs with a Black A1 propeller.

The 4 bottom connectors receive the motor power cables that are Red/Yellow wire pairs from each motor. Counting the sockets 1-4 from left to right.

Front Right motor connects to socket 1.

Front Left motor connects to socket 2.

Rear Left motor connects to socket 3.

Rear Right motor connects to socket 4.

The Red/Green wire pairs from each motor power the LED to that branch, they connect to 4 of 6 sockets on the top of the receiving board. There is no sequence required.

The headlight LED, and underside LED bars connect to the remaining 2 sockets on the top of the receiving board. Again, no sequence is required. All LED Red/Black and Red/Green wire pairs connect to top of the receiving board.

Use a pair of tweezers to remove the silver nut from the bottom of the carbon tube.

Once the ball-bearing is removed, use tweezers and remove the entire tube and gear from the drone arm assembly.

However, if your smaller gear is damaged/stripped as well, then you will need lightly pry it free from the metal post it sits on using a spudger.

Once it is free, take your tweezers and remove it completely from the drone arm assembly.