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(888) 312-8812 Login SignupThe Mack Hydraulic Assist Brake Master Cylinder is constructed to deliver powerful, reliable braking force for cab and chassis body applications. If braking performance feels weak, inconsistent, or spongy, replacing the master cylinder is crucial to restoring full hydraulic pressure and response. Manufactured to meet Mack’s high standards, the Mack 21485016 ensures smooth braking operation under heavy loads, keeping both drivers and cargo safe. When it comes to brakes, there’s no room for compromise—this master cylinder is the upgrade that keeps everything in check.
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