Current through Register Vol. 54, No. 44, November 2, 2024
(a)
Condition of braking systems. Braking systems and components
shall be in safe operating condition as described in §
175.110 (relating to inspection
procedure).
(b)
Service
brakes. Every medium and heavy truck, bus and school bus shall be
equipped with a service brake system. See
75 Pa.C.S. §
4502
(relating to general requirements for braking systems).
(1) The service brakes shall act on all
wheels upon application except for the following:
(i) On interconnected dual wheels, the brakes
may act upon only one wheel.
(ii) A
motor vehicle being towed in driveaway-towaway operation.
(iii) The steering axle of a truck or
truck-tractor having three or more axles was manufactured before July 25, 1980.
The steering axle of truck or truck-tractor having three or more axles
manufactured between July 24, 1980 and October 27, 1986 shall be equipped with
functioning service brakes not later than February 26, 1988.
(2) Service brakes, when required,
shall be capable of stopping the vehicle in not more than the maximum stopping
distance prescribed in Table I (relating to brake performance).
(3) Surge or inertia type brake systems are
authorized.
(4) The brake lining
and brake fluids shall be of a type approved by the vehicle manufacturer or
shall meet the Society of Automotive Engineers (SAE) standards (J998, January
1980)-see Appendix A (relating to minimum requirements for motor vehicle brake
linings-SAE J998).
(5) A vehicle
specified under this subchapter manufactured or assembled after June 30, 1967
and designated as a 1968 or later model shall be equipped with a service brake
system of a design that rupture or failure of either the front or rear brake
system will not result in the complete loss of braking function. Braking
function may be obtained by hydraulic or other means through a normal brake
mechanism. In the event of a rupture or failure of an actuating force
component, the unaffected brakes shall be capable of applying an adequate
braking force to the vehicle.
(6)
Metal from the shoe may not contact the brake drums or rotors.
(7) If a vehicle has air brakes, warning
signal devices or gauges, it shall be maintained in proper operating condition,
as described in § 175.110.
(8)
A vehicle to which additional axles and wheels have been added shall be
equipped with brakes on all additional wheels.
(9) An air chamber push rod travel may not
exceed the manufacturer's specifications' maximum stroke allowance. See Chart 4
(relating to brake chamber push rod travel (typical)) for a drawing of the air
chamber push rod.
(10) Brake lines
shall be approved for use as brake lines.
(c)
Parking brake system. A
vehicle specified under this subchapter shall be equipped with a parking brake
system. See
75 Pa.C.S. §
4502.
(1) The parking brake system shall be
adequate to hold the vehicle on a surface free from ice or snow on a 20% grade
with the vehicle in neutral.
(2)
The parking brakes shall be separately actuated so that failure of any part of
the service brake actuation system does not diminish the vehicle's parking
brake holding capability.
The provisions of this §175.94 amended under the Vehicle
Code,
75 Pa.C.S. §§
4103,
4301,
4501,
4521 and
6103.
