What Causes Incomplete Brake Caliper Retraction?

1 Answers
MacLuna
07/29/25 9:59pm
Incomplete brake caliper retraction may be caused by the piston not returning or the guide sliding pin not retracting properly. Below is a detailed explanation of the reasons for incomplete brake caliper retraction: 1. Brake caliper piston not returning: Prolonged failure to replace brake fluid and imprecise manufacturing of the brake caliper can lead to rust buildup inside the piston over time. To address this, the brake caliper can be disassembled to clean rust and debris from the piston and piston cylinder, followed by replacing the brake fluid with new fluid. 2. Brake caliper guide sliding pin not retracting: If the sliding pin becomes rusted and stuck, the caliper cannot retract properly, leading to issues such as brake lock-up.
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