['CMV Parts and Maintenance']

['Brakes']

06/03/2026

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REGSENSE
Topic Search
CMV Parts and Maintenance - Brakes

§393.44 Front brake lines, protection

RegSense Fleet Safety Federal Motor Carrier Safety Administration (FMCSA), DOT CMV Parts and Maintenance Focus Area Compliance Docs Standard Interpretation English Brakes Transportation USA

Question 1: Does the term ‘‘rear wheels’’ include the tag axle on a bus/motorcoach?

Guidance: Yes. The braking system on a bus/motorcoach must be constructed so that if any brake line to either front wheel is broken, the driver can apply the brakes to all of the wheels on each rear axle.

['CMV Parts and Maintenance']

['Brakes']

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