back brake clunking on sparta ion

[mastanlem]

Hi help appreciated for this problem.
When I pull the back brake on my Sparta IOn it makes a clunking noise.
When I pull the brake whilst stationary it doesn't.

Marina

 

[John L]

Hi Marina

I'm afraid I don't know the bike. What kind of brakes are on it?

John

 

[mastanlem]

Hi Marina

I'm afraid I don't know the bike. What kind of brakes are on it?

John

Hi John,

They are drum brakes.

Thanks Marina

 

[flecc]

Since the Sparta has a rear motor, it's probably a Shimano roller brake. These often have a cooling disc with radial vanes and that can be somewhat loose and clunk at times.

I haven't come across anything else on a roller brake that can cause this problem, though if it's run dry that could make its operation noisy. If it is a roller brake it can be lubricated by a special oil that Shimano make, there's a small hole in the side plate of the brake for the oil to be squirted in.

This Shimano technical document shows a roller brake with the optional cooling disc, so you might be able to identify it from that.
.

 

[mastanlem]

Since the Sparta has a rear motor, it's probably a Shimano roller brake. These often have a cooling disc with radial vanes and that can be somewhat loose and clunk at times.

I haven't come across anything else on a roller brake that can cause this problem, though if it's run dry that could make its operation noisy. If it is a roller brake it can be lubricated by a special oil that Shimano make, there's a small hole in the side plate of the brake for the oil to be squirted in.

This Shimano technical document shows a roller brake with the optional cooling disc, so you might be able to identify it from that.
.

Thank you both for your advice. My husband is going to have a look at it and if he can,t sort it will take it to my local repairer.

marina

 

[John L]

Hi Marina

Unfortunately I've no experience of roller brakes so I can't offer any help - sorry.

John