tchilton

My brother had a 36 Volt SX Iacocca Ebike that was just sitting for several years - he gave it to me and I've been riding it for a year (replaced the battery with the battery replacement from NYCE wheels and bought new tires). It's been great - but now when I apply the throttle, there is a whine from the back hub and no power to the wheel.

Can anybody help me out with advice on what's wrong & how to fix it (if possible)? I was riding to work everyday and riding for pleasure also - this is a big loss for me. I can't afford a new ebike and really want to get this one fixed. I had lost about 40 lbs. (I can't ride up the hills on a regular bike, not in good enough shape). I don't want to just start taking the bike apart, as I don't know what I''m doing.

If it's not fixable, is there a place that buys old Ebikes for parts? It's in great shape, aside from the problem with the hub.

Thanks.

morph999 

I'm not familiar with your bike. If you could tell us the year that it was made, that would help. If it's a brushless motor, you might have problems with the hall sensors. If it's a brushed motor, then it's probably the controller.

You might just need to make sure all your connections are probably connected. If the hall sensors come apart, it can create the very problem that you have. The hall sensors are tiny wires coming from the controller to the motor.

morph999 

Also, take a voltmeter or a multi-meter and make sure your batteries are fully charged, they should read about 14v or more fresh off the charger, for each 12v battery. Also, try pulling the motor/wheel of the ground and give it throttle to see if it will move with no load on it.

EDIT: Ok, you have a Brushed motor so it won't be the hall sensors. This sounds like a dumb statement but it's probably your controller or batteries. If you are tech savy, you could take the battery leads from the motor and hook them directly up to the battery to see if the motor will move. If it moves, then you know the motor is fine and it's the controller that is bad.

If you want better help, you might try this forum:
https://endless-sphere.com/forums/viewforum.php?f=2

nwmtnbkr

I would agree with morph that you might want to pose your question at the Endless Sphere forums. There could be a wide variety of reasons you're having this issue. It may be something minor, maybe not. I also would agree that you need to do a little diagnostic detective work with a volt meter. Good luck.