South Carolina Code of Regulations
Chapter 38 - DEPARTMENT OF PUBLIC SAFETY
Article 5 - STATE TRANSPORT POLICE REGULATIONS
Subarticle 1 - UNMANUFACTURED FOREST PRODUCTS TRUCKING REGULATIONS
Part 38-393 - PARTS AND ACCESSORIES NECESSARY FOR SAFE OPERATION
Subpart C - BRAKES
Section 38-393.50 - Reservoirs required
Universal Citation: SC Code Regs 38-393.50
Current through Register Vol. 48, No. 9, September 27, 2024
(a) General. Every commercial motor vehicle using air or vacuum for breaking shall be equipped with reserve capacity or a reservoir sufficient to ensure a full service brake application with the engine stopped without depleting the air pressure or vacuum below 70 percent of that pressure or degree of vacuum indicated by the gauge immediately before the brake application is made. For purposes of 38-393, a full service brake application is considered to be made when the service brake pedal is pushed to the limit of its travel.
(b) Safeguarding of air and vacuum.
(1) Every truck, and truck tractor, when
equipped with air or vacuum reservoirs and regardless of date of manufacture,
shall have such reservoirs so safeguarded by a check valve or equivalent device
that in the event of failure or leakage in its connection to the source of
compressed air or vacuum the air or vacuum supply in the reservoir shall not be
depleted by the leak or failure.
(2) Means shall be provided to establish the
check valve to be in working order. On and after May 1, 1966, means other than
loosening or disconnection of any connection between the source of compressed
air or vacuum and the check valve, and necessary tools for operation of such
means, shall be provided to prove that the check valve is in working order. The
means shall be readily accessible either from the front, side, or rear of the
vehicle, or from the driver's compartment.
(i)
In air brake systems with one reservoir, the means shall be a cock, valve,
plug, or equivalent device arranged to vent a cavity having free communication
with the connection between the check valve and the source of compressed air or
vacuum.
(ii) Where air is delivered
by a compressor into one tank or compartment (wet tank), and air for braking is
taken directly from another tank or compartment (dry tank) only, with the
required check valve between the tanks or compartments, a manually operated
drain cock on the first (wet) tank or compartment will serve as a means herein
required if it conforms to the requirements herein.
(iii) In vacuum systems stopping the engine
will serve as the required means, the system remaining evacuated as indicated
by the vacuum gauge.
Disclaimer: These regulations may not be the most recent version. South Carolina may have more current or accurate information. We make no warranties or guarantees about the accuracy, completeness, or adequacy of the information contained on this site or the information linked to on the state site. Please check official sources.
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