Mod for Picoo Z Mini Helicopter

Step 4: Removing the drive gear and bearings

Once the main rotor is removed, the drive gear and shaft can be removed by first removing the small brass collar at the bottom of the shaft. After the shaft has been pulled out remove the two flanged brass bearing at both ends of the rotor shaft mount (shown below being removed with the dental pick). Then push the large drive gear off of the steel shaft. Save the flat washers (2); one is at the top between the drive gear and the brass bearing and the other is at the bottom, between the brass collar and the brass bearing. We'll be re-installing the flat washers into the same positions during re-assembly, but the bushings can be discarded as they will be replaced with the ball bearings.

Comments

[mowhawkman290]

i dont get what the washer does. im new to rcs

[fireballxl5]

I think you're referring to the step where the rotor/blade asm. gets removed, if so, the washer (with the slot cut into it) is used to protect the bottom of the rotor (plastic) when you insert the screwdriver between it and the pliers that are locked to the rotor shaft. The washer presses against the rotor but slides over the shaft allowing you to twist the screwdriver between the washer and pliers to remove the rotor/blade assembly. Hope that helps.

[zuliani71]

Hi, I'm trying the mod but how to remove the small brass collar at the bottom of the shaft. Bye

[fireballxl5]

Use a pair of locking pliers to grip the rotor shaft, then use a second pair of pliers to grip the collar (don't compress or distort the collar as you'll need it later). Slowly rotate the collar back and forth until it comes of the bottom of the shaft. I hope that helps and good luck with the mod.

[zuliani71]

Hi fireball, thanks for answering me, right now I'm fighting to remove the main rotor from the shaft and it's a real nightmare, I'm using your instructions and I've good locking pliers but anyway it's hard to remove. Bye.