FF - Electronic Parking Brake

Hi All, in my ongoing quest to find the source of my 'chuff chuff chuff' rotational sound from the rear, I took my brake discs off and found one of my EPB shoes delaminating, the friction material flapping around.

Thinking I had my smoking gun, I put an order in for new shoes and springs and went for a drive with no EPB hardware in my NSR. Annoyingly the noise is still there - but still, the shoe needed swapping so not too disheartened.

...until I came to rebuild the EPB hardware. What a pain! I'm young enough to have never had to work on drum brakes before so this was quite a nasty shock!

After finally getting it all together with my 18 hands, it's apparent that even with the EPB disengaged that the cable in this corner is very contracted and the shoes are pushed out to their maximum reach. I fear that my mistake was driving the car with the hardware missing on one corner, and that the mechanism further upstream has pulled my cable too far as there was nothing resisting it.

Tomorrow I'll get the undertray off and see if I can fettle the cable and recentralise it, hopefully taking some slack from the OSR and giving it back to the NSR.

If anyone has any other advice, I'd appreciate it before getting on the tools again.

Thanks

 

Thanks! Got it rebuilt this weekend and adjusted. The issue was that I'd refitted the linkage for the cable and the "elbow" on it was completely straight so despite the slack cable, it wasn't retracting. I finessed it by placing a ratchet strap around the shoes and gently squeezing them together to get the linkage back into line.

Once that was sorted, was just a case of adjusting the shoes the normal way.

My noise still persists, but that's another thing ruled out!

 

Thank you. I dropped the car with Ferrari this morning to get some other stuff sorted and once again failed to replicate the sound with a technician in the car The roads were wet, and the noise was just drowning it out.

We heard it very faintly, nowhere near doing it justice and he suggested it might just be normal differential noise. I'm sure he'd say otherwise if he could hear it at its worst.
Loading the car up side to side doesn't seem to influence the noise, so I'd preliminarily ruled out wheel bearings - but I don't think it can be ruled out for sure.

 

Just to conclude, the issue did end up being the NSR wheel bearing which Ferrari replaced under Power15, along with some front wishbones due to torn bushes. Didn't expect either to be covered by a warranty, so nice result.

The delaminating front discs, less so!