Tag Archives: Shaft Assembly

1 Black Main Rotor Set (1 Upper + 1 Lower Rotor Blades) For Micro Mosquito & FireFly RC Helicopters This is a replacement main rotor shaft for the Firefly or Micro Mosquito helicopter. Instructions for removal the old shaft: 1. Remove the main rotors 2. Remove the two small motor gears (pinions) by prying them off with a small flat screwdriver, making note of which one goes on which side 3. Slide the upper large main gear off of the shaft 4. Remove the C-clip that holds the old shaft in at the bottom by pulling the black plastic tab 5. Pull the shaft assembly up and out, or press it through from the bottom 6. Turn the shaft upside down and brace the tip on a hard surface 7. Pressing at the center, push the remaining large gear down the shaft, and remove it 8. Slide the sleeve and washer off of the old shaft 9. Pull the end cap off the shaft, you may need to hold the shaft with pliers (this may damage the shaft, so only use pliers on the old one) Installation instructions: 1. Press the end cap onto the bottom of the new shaft (the end that does not have a flat spot on the side) 2. Slide the washer and sleeve onto the shaft 3. Slide the lower main gear onto the shaft, aligning the “D” shaped hole with the “D” shaped top of the shaft 4. Brace the bottom of the shaft on a hard surface, and push the gear down until it almost touches the sleeve (there should be a room for the sleeve to move up and down a tiny bit, but not more than 1/32″) 5. The shaft can now be inserted into the body of the helicopter. 6. Clip the C-clip onto the bottom of the sleeve where it protrudes through the bottom of the helicopter 7. Slide the upper large gear onto the shaft 8. Replace your pinion gears (the left pinion gear should mesh with the lower main gear, right pinion gear should mesh with the upper main gear) 9. Replace the rotors (lower rotor first with the notches down, meshing with the notches on the upper main gear, the spacers, the upper rotor, and the rubber capping tube)