Motor cutting out, thoughts?

[Nealh]

I made mention to the motor connector in #23, #32 and #56 which you finally picked
up on.

 

[Nealh]

Only if I hold, I can't work out what would hold it while riding. You mentioned earlier putting some insulating tape around the axle might help. I'll give that ago.

It shouldn't slip if you hold it , it should be firm enough to resist slipping.
The plastic spline can and do lose grip , you have reglued your one so it may be lose because of that . Tape can be used to increase the axle diameter thus giving the spline something to bite into for grip which is more pliable .
One will need to degrease /clean the axle before applying tape .

 

[Nealh]

When fitting a PAS I never fit the disc to the axle , I prefer to bolt the disc to the inside of the smallest chain ring . There is no way then that it can ever move bar by crank rotation.
One then has to reverse the sensor head bracket so it is cranked out more to the chain ring , unscrew the sensor and screw it on the opposite face .
One would have to drill a new hole for the LED to poke thru. If the sensor gap is more then 1mm , I will if need be use a thin piece of 1mm /2mm ali shim behind the sensor head to move it nearer.

 

[volt x]

It shouldn't slip if you hold it , it should be firm enough to resist slipping.
The plastic spline can and do lose grip , you have reglued your one so it may be lose because of that . Tape can be used to increase the axle diameter thus giving the spline something to bite into for grip which is more pliable .
One will need to degrease /clean the axle before applying tape .

If I can get a new one that'll be the better thing to do but in the meantime some tape and a clean will be tried,

 

[volt x]

When fitting a PAS I never fit the disc to the axle , I prefer to bolt the disc to the inside of the smallest chain ring . There is no way then that it can ever move bar by crank rotation.
One then has to reverse the sensor head bracket so it is cranked out more to the chain ring , unscrew the sensor and screw it on the opposite face .
One would have to drill a new hole for the LED to poke thru. If the sensor gap is more then 1mm , I will if need be use a thin piece of 1mm /2mm ali shim behind the sensor head to move it nearer.

If you look at the photo I posted I can't see that being possible.

 

[chris_n]

You could mark the disc and the axle with a paint pen/tippex/marker pen to see whether there is any movement. Then you could confirm if there is a problem or not, before spending any money and more importantly introducing a potential new variable into the equation.

 

[volt x]

You could mark the disc and the axle with a paint pen/tippex/marker pen to see whether there is any movement. Then you could confirm if there is a problem or not, before spending any money and more importantly introducing a potential new variable into the equation.

I was able to look at the disc whilst cycling and it moved as it should. I'm going to remove the brake sensors and try the bike without them. As most of the time the motor cuts out when the brakes have been used, It can't do any harm. Maybe the speed sensor is faulty.

 

[volt x]

I made mention to the motor connector in #23, #32 and #56 which you finally picked
up on.

Yesterday 30/05 I used the bike, it did cut out usually on braking or slowing down. If I can maintain a steady speed the motor runs without problem. When I got a chance to ride safely and watch the disc. It never stopped moving. That doesn't explain why the motor is cutting out. Might it be the sensor is the issue.

I have ordered a new disc and sensor which should arrive sometime in May. All I know is after trying everything I could. I went back to the disc, but trying everything you have suggested hasn't completely solved the problem. Hopefully the replacement might be the answer. Failing that then it's back to the controller, motor and everything else.

 

[volt x]

Volt have got back to me. They're saying it sounds like the planet gears need replacing. They want the model number. It's supposed to be a Bafang motor with possible r1,r2, and so on. I can't find it.

 

[volt x]

Well the motor is not a Bafang ,but a Shengyi. I seen another related thread on here and that it seems was sorted out. Research suggests Shengyi parts are hard to find. You tube video of a guy trying to fix what looks like the problem I have. He never managed to fix the planet gears apparently it was the clutch. He said the motor should only turn one way , so like mine it's turning both ways.

I've had a look online and it doesn't bode well. Though I wait in vain to hear back from Volt as to what they might be able to offer. The thing is I was advised on here that the hub was the last place to look. also the magnetic disc was more than likely to be the issue. Perhaps the controller might have been the problem. It makes no odds, except I have some advice to offer. If there is sounds coming from the hub, there is power going to the motor the speed sensor and magnetic disc look as if they are working. The problem more than likely is, the planetary gears , the clutch, might be an easy fix. It depends on make of motor. Unfortunately the hub is the last place you want to go. Simply because it's horrible, loads of grease. In my case it was the first place to go .

Of course you have to look at everything , but nobody on here suggested looking at the hub. Ah well it looks like I need a new motor, or a bike. Can't afford either I've just become a pensioner with very poor prospects.

 

[esuark]

I'm off out now but look in this thread below it may be the answer to your problem..........

Yose 350W not engaging after left standing

 

[esuark]

I'm back..........

I suffered intermittent drive on my Bafang SWX02 and it was the clutch sticking and these are easily available. Another member with a different motor with same problem soaked his clutch in I don't know what but it freed his clutch. I think what little grease is in the clutch hardens.....

 

[volt x]

I'm off out now but look in this thread below it may be the answer to your problem..........

Yose 350W not engaging after left standing

Thanks for this , wish I had seen it earlier. The attached photo shows a raised ring that should be seated. Underneath it is a ball baring set. All the balls are there but the stuff in between is disintegrating.

. This the video I previously mentioned. the motor is slightly different to mine but they're both Shengyi. The guy couldn't find a planetary gear replacement. Neither can I , but I'm sure I do need a replacement. Not unreasonable considering it is about 8 years old.

 

[thelarkbox]

from a look at your pic those nylon gears look in great condition for 8 yr old kit. all visible teeth look well defined, and no melted burr edges.. The bearing!! cant see that much from the pic but your description is damning enough.

and that sure looks like a clutch mechanism stuck open, probably due to the disintegrated ball race a good clean out with a solvent safe with nylon seems due, with the crud gone the obstruction may become clear?

 

[volt x]

from a look at your pic those nylon gears look in great condition for 8 yr old kit. all visible teeth look well defined, and no melted burr edges.. The bearing!! cant see that much from the pic but your description is damning enough.

and that sure looks like a clutch mechanism stuck open, probably due to the disintegrated ball race a good clean out with a solvent safe with nylon seems due, with the crud gone the obstruction may become clear?

You say crud, I say bearing ring assembly. I used to be quite good at getting sharper images. You might be able to make out the points between the bearings. There's some parts missing . I tried to remove the PGs yesterday but they are not cooperating. What's happening on the other side of the bearings is anybodies guess.

Should I continue to try and get the planetary gears off. In the video the guy uses two screw drivers with some force to remove them. I tried that but I'm a bit worried, as I've never done this.

 

[thelarkbox]

Im just an armchair onlooker, who cracked a few engines as a lad and always had bits left over under the bottom box flap after re-assembly..
But with a bad bearing that looks like it may also be interfering with desired action? (clutch plates?) I would focus on pulling that.. If removing the Planetary gears is part of the bearing removal procedure ? - full steam ahead!, Otherwise 1 issue at a time perhaps?

 

[esuark]

haven't a clue how that one works but nothing like my SWX02 clutch which has 3 rollers that climb up a slight ramp to engage and much beefier all-round. Good luck with it but maybe a thorough clean will sort it.......

 

[volt x]

Im just an armchair onlooker, who cracked a few engines as a lad and always had bits left over under the bottom box flap after re-assembly..
But with a bad bearing that looks like it may also be interfering with desired action? (clutch plates?) I would focus on pulling that.. If removing the Planetary gears is part of the bearing removal procedure ? - full steam ahead!, Otherwise 1 issue at a time perhaps?

I don't know if you've watched the video I posted , but it would seem there's not much chance of fixing it. Who knows, the guy on the video is a bike mechanic. The video stops without resolve and in the comments section he mentions. The parts could not be found and he had to buy a new motor.
I don't know if the clutch is in the planetary gears or in the motor.

There's certainly no easy fix, at least not if I'm doing the fixing. If anything it's a learning experience.

 

[volt x]

haven't a clue how that one works but nothing like my SWX02 clutch which has 3 rollers that climb up a slight ramp to engage and much beefier all-round. Good luck with it but maybe a thorough clean will sort it.......

If only a good clean was the answer and for all I know is it might be. I'm having difficulties in removing the planetary gears. So I'm worried about trying to clean anything whilst they're attached to the motor.

 

[chris_n]

I don't know if you've watched the video I posted , but it would seem there's not much chance of fixing it. Who knows, the guy on the video is a bike mechanic. The video stops without resolve and in the comments section he mentions. The parts could not be found and he had to buy a new motor.
I don't know if the clutch is in the planetary gears or in the motor.

There's certainly no easy fix, at least not if I'm doing the fixing. If anything it's a learning experience.

That 'bearing' is the clutch.