Recent content by Bearing Man

This could be one of three things on a Gen 4. And what @arTNC said is the most likely. The sprocket lockring nut can back off very slightly, or be tight but not physically clamping the chainring spider hard enough. If the spider is aluminium, it quickly wears the splines off the spider allowing...

Sorry for the late reply, just came across your post. This is not a common sound for a Brose to make but going on the frequency of the noise, it is either a planetary gear snapped off or belt related. It would definitely be worth getting it checked out sooner rather than later. Does the noise...

Yes, it's Michael in Tennessee. Just check you got the upgrade before charging through too many puddles. :)

If Michael did the Brose upgrade for you, streams and washing won't be a problem. The upgrade makes the motor extremely water resistant. It does not make it totally water proof, but streams, big puddles and washing (without a pressure washer) should be no problem.

Because these are bushes and not bearings, you will feel a slight bit if play, even on a new Gen 4 motor. This is usually around 2mm by the time it gets to the very end of the pedal arm. The picture below shows how the dirt gets into the motor and you can see the plastic bushes shown on our...

It was dirt! This is not uncommon with the Gen 4 once the crankshaft bushes wear badly.

I do have some slightly bad news for you guys though. We have been logging lots of faults with the Gen 4's whilst constantly evaluating the failures we're seeing. We could not workout why the left hand crankshaft bearing keeps failing and the right hand does not (well, not so much anyway). It...

Because of the outlay needed to support a motor, especially one with a large number of different models, we can't afford to do this until we have the demand. Unfortunately, the demand from Bafang owners is just not there yet. Rest assured, as soon as we start getting enough enquiries, we will...

These are the two tools we use to do this job several times a day. I'm not recommending to use Snap-On but cheaper equivalents can be found.

The genuine Bosch picture does show standard circlips, but the genuine kit will contain C-clips.

We currently repair: Bosch Brose Mahle Impulse Panasonic Yamaha (Inc Giant) We do support Shimano with bearings, but no longer service the motors due to Shimano refusing to speak to us. Please campaign to Shimano to help us with software support because if they help us a little, we can help you...

Oop's, unfortunately, that is the perfect sign for the beginning of the end for that bearing!... You know where we are if you need us :)

A car rack is fine, just wrap a plastic bag or something around the motor if the roads are wet. It's not direct water pressure that you are protecting from, it's the air pressure forcing the spray in from all angles, so the roof won't be any better. The bag does not need to be tight or sealed...

We have done a few Rocky Mountain motors, but they're not too common in the UK. Powerful motor, but heavy and a little over complex, seem generally strong though.

Great question. Most motors are hermetically sealed, once water gets in it does not get out again. Usually, the water drops to the bottom of the motor and if warmed, just condenses and tends to collect on the PCB as this is usually a free standing isolated part inside the motor that tends to be...