Current through Register Vol. 48, No. 9, September 27, 2024
(a)
General. A truck, truck tractor, or a combination of motor vehicles must have
brakes adequate to control the movement of, and to stop and hold, the vehicle
or combination of vehicles.
(b)
Specific systems required.
(1) A truck, truck
tractor, or combination of motor vehicles must have
(i) A service brake system that conforms to
the requirements of Regulation 38-393.52; and
(ii) A parking brake system that conforms to
the requirements of Regulation Regulation
38-393.41.
(2) A truck, truck tractor, or a
combination of motor vehicles manufactured on or after July 1, 1973, must have
an emergency brake system that conforms to the requirements of Regulation
Regulation
38-393.52(b)
and consists of either
(i) Emergency features
of the service brake system; or
(ii) A system separate from the service brake
system.
A control by which the driver applies the emergency brake
system must be located so that the driver can readily operate it when he/she is
properly restrained by any seat belt assembly provided for his/her use. The
control for applying the emergency brake system may be combined with either the
control for applying the service brake system or the control for applying the
parking brake system. However, all three controls may not be combined.
(c)
Interconnected systems.
(1) If the brake
systems specified in paragraph (b) are interconnected in any way, they must be
designed, constructed, and maintained so that, upon the failure of any part of
the operating mechanism of one or more of the systems (except the service brake
actuation pedal or valve)
(i) The vehicle will
have operative brakes; and
(ii) In
the case of a vehicle manufactured on or after July 1, 1973, the vehicle will
have operative brakes capable of performing as specified in Regulation
38-393.52(b).
(2) A
motor vehicle to which the emergency brake system requirements of Federal Motor
Vehicle Safety Standard No. 105 (Section 571.105) applied at the time of its
manufacture conforms to the requirements of paragraph (c)(1) if
(i) It is maintained in conformity with the
emergency brake requirements of Standard No. 105 in effect on the date of its
manufacture; and
(ii) It is capable
of performing as specified in Regulation Regulation
38-393.52(b),
except upon structural failure of its brake master cylinder body or
effectiveness indicator body.
