Shimano brake bleed intervals?
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#27
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Yes, bicycles are designed to be simple to service for anyone with minimal DIY skills.
Cars and MCs on the other hand use paint-peeling DOT fluids, have ABS reservoirs and valves/pistons, multiple brake calipers, midpoint bleed nipples (because of routing), etc. They're significantly harder to work on and getting all their out on a fresh fill can be challenging. In addition, because of the fluids and materials, they tend to collect debris in the piston areas that should be removed (via the bleed valve). 20 years is WAY too long to not service car brakes.
Cars and MCs on the other hand use paint-peeling DOT fluids, have ABS reservoirs and valves/pistons, multiple brake calipers, midpoint bleed nipples (because of routing), etc. They're significantly harder to work on and getting all their out on a fresh fill can be challenging. In addition, because of the fluids and materials, they tend to collect debris in the piston areas that should be removed (via the bleed valve). 20 years is WAY too long to not service car brakes.
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You'll know when you actually need to bleed your brakes because the levers will turn into on/off switches. (Meaning you lose almost all modulation.) If that's not happening follow the advice on page one.
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I don't believe Shimano suggests scheduled maintenance for their hydraulic brakes. Unless you break something and the fluid gets contaminated by debris or other particles, I would not change it.
If you need to bleed your system after such short usage, you have a bigger problem IMO.
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