Help! Clicking from motor

[mrgeoff]

Hi, got a Cube from 2015 with a Bosch Drive Unit Active Cruise motor.
Its developed an odd clicking from the motor unit, like a double click on the LH pedal stroke. Its much of a click sound.

Is this repairable? New bearings, or components required? Where do I go for these please?


Thanks!

 

[vfr400]

The general advice is stop using your bike as soon as there's any suspicion of bearing damage because small damage is repairable, but if you leave it too long, it isn't.

Without seeing or hearing the noise. It's impossible to say. I'd lift the chain off, then wiggle the crank to see if there's any movement and turn it to see if you can feel any roughness or hear any noise.

 

[mrgeoff]

Thanks, the only repair kit I can find so far is from Performacelinebearings.com?

Cheers.

 

[vfr400]

Thanks, the only repair kit I can find so far is from Performacelinebearings.com?

Cheers.

They'll do the repair for you if you ask them nicely, but you need to confirm that the bearings are faulty first. You wouldn't want to spend £200 on bearing replacement only to find that you had a twig caught behind your crank or it was your pedal making the noise.

 

[mrgeoff]

The pedals backpedal with ease, there is no noise or undue roughness.
I can only just feel side to side play in the crank by holding the crank at the ends by the pedals, the movement is only just detectable.
If I push on a pedal static, there is a bit of noise where I take up slack in the internal gears I guess, but its a different noise to the click, click. This taking up the slack is the same through a complete rotation whereever I take up the slack.

The click click is less than 90 degrees apart, with the rest of the 270+ degree crank rotation with no noise. Only when im riding. I cant get it to do it by having the bike on a stand and doing the pedals by hand.

Cheers!

 

[vfr400]

The pedals backpedal with ease, there is no noise or undue roughness.
I can only just feel side to side play in the crank by holding the crank at the ends by the pedals, the movement is only just detectable.
If I push on a pedal static, there is a bit of noise where I take up slack in the internal gears I guess, but its a different noise to the click, click. This taking up the slack is the same through a complete rotation whereever I take up the slack.

The click click is less than 90 degrees apart, with the rest of the 270+ degree crank rotation with no noise. Only when im riding. I cant get it to do it by having the bike on a stand and doing the pedals by hand.

Cheers!

If it only does it under high load, it could be the motor fixing bolts, which is a relatively common problem. See if tightening them solves it.

 

[mrgeoff]

If it only does it under high load, it could be the motor fixing bolts, which is a relatively common problem. See if tightening them solves it.

Good tip, thank you, I will try that!

 

[Swizz]

Is the crank tight?

 

[TedG]

If it only does it under high load, it could be the motor fixing bolts, which is a relatively common problem. See if tightening them solves it.

Had this some miles ago. Dealer tightened the motor which was loose in the cradle as well as side to side movements of the crank of about 3mm.
This repair lasted about 250 miles and re-occurred. Back to dealer who apparently fitted some shims and re-torqued the motor.
Feels OK now but not convinced that it will last. I suggested a drop or two of Loctite from back in my days of motorbike box rebuilds but this wasn't met with much enthusiasm.
Shimano motors with whines and play??

 

[mrgeoff]

Just tightened my motor cradle bolts (5 of them) and still clicking. Tightened the 2 bolts on the ends of the cranks too.

The clicking is a similar click as to when the drive engages statically, and a bit similar to the click when you wheel the bike backwards.

im kind of OK if its the motor and how I use it, at the mileage its at.


Thanks!

 

[mrgeoff]

Doh, it was a pedal! Sprayed WD40 in the pedal bearing, noise gone!

 

[soundwave]

Doh, it was a pedal! Sprayed WD40 in the pedal bearing, noise gone!

wd40 is for water displacement it is not really a lube get some of this.

WD-40 Bike All Conditions Lubricant

The PTFE based formula is capable of handling any weather, to ensure the bike will be fully protected from water ingression, corrosion, rust and wear. The clear, viscous WD-40 formula will quickly work deep into mechanisms and tight spaces. WD-40 All Conditions will leave a long lasting coat of...

www.toolstation.com

 

[mrgeoff]

They are cheap alloy pedals with synthetic bearings, I’m not going to worry too much, but thanks

A quality pedal would have got a strip and lube.

 

[Bobajob]

Just tightened my motor cradle bolts (5 of them) and still clicking. Tightened the 2 bolts on the ends of the cranks too.

The clicking is a similar click as to when the drive engages statically, and a bit similar to the click when you wheel the bike backwards.

im kind of OK if its the motor and how I use it, at the mileage its at.


Thanks!

I had the same and it was the pedal bearings packing up. I removed the pedal and lubed it up with 3-1 oil to see if any difference. It stopped clicking for a while so in the end it was the pedal.