StephenIrwin

Hi.

I got an Amce cyclone rc car for Christmas and have finished building it. The wheels should spin freely, I would imagine, but they are tight to spin, to give an example of how I mean, it feels like the brake is being applied slightly.

It is not a brake issue though as the brake disc has sufficient room between the brake pads.

I have tried taking the differentials (front and rear) out and rebuilding them but the 4 wheels are still rather tight to spin by hand. They do turn, but no matter how fast I try to spin any wheel, as soon as I let go the wheel instantly stops spinning.

Any ideas of what the problem could be?

Thanks!

StephenIrwin

Any help would be appreciated

blis

Remove the side belt.
Check rear versus front.
If front is ok and rear is tight
Check clutch and 2 speed
If 2 speed and clutch are free
Check rear pullleys, belts may be too tight or lay shaft.
If rear is still binding.
Remove diffs and check each hub separately..

NOTE: there will always be some play in the wheel hubs, the wheels will have side movement to be free.

scary_jerry

I was impressed with 'Blis's' attack on the problem and I watched some 'Youtube' videos because I didn't know what an Acme Cyclone was. Some of the videos didn't lead me to believe that that car is much of a 'free-rolling' animal anyway. I just grabbed my brand-new HPI Sprint (belt-drive electric) and tried rolling it and now feel that the belt-drive cars have an inherent resistance that feels like the brake is dragging. Turning one wheel gets the diff. friction involved and pushing the car on a smooth surface got no 'coast' at all.

Good Luck