Bosch 23-15-2055 Manual page 211

9.2.7 Problems with disc brakes
Symptom Cause
Ringing and unusual
sounds from the disc Riding on tarmac with off-road tyres.
brake.
Dirty or greasy brake disc.
Worn brake disc.
Low braking power from
the disc brake.
Worn brake lining.
Brake lining vitrification.
Metallic noises from disc
Worn brake linings.
brake.
Spongy, soft or poor Brake calliper fitted incorrectly, brake
pressure point in disc disc loose, brake disc or brake lining
brakes. worn or brake system leaking
Dirt.
Worn or incorrect brake linings.
Wheel, hub or axle fitted incorrectly.
Brake calliper and/or brake disc fitted
incorrectly.
Noises when a disc brake
is applied.
Incorrect torques.
Brake disc damaged by side impact.
Vitrified brake linings.
Brake system leaking.
Incorrect brake mount height.
Table 64: Disc brake error solution
MY23P01 - 22_1.0_21.10.2022
Troubleshooting, fault clearance and repair
Remedy
 Contact specialist dealer. Fit a city or trekking tyre.
 Clean brake disc thoroughly with white spirit or brake cleaner.
 Contact specialist dealer. New brake disc.
 Contact specialist dealer. New brake linings.
 Contact specialist dealer. New brake linings and brake disc.
 Contact specialist dealer.
1 Clean brake disc and brake thoroughly.
2
If the problem is not solved, contact your specialist dealer.
 Contact specialist dealer. New brake linings and brake discs.
 Contact specialist dealer. Check brake system and wheel
assembly.
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