Air Brake systerm problems
Nov 15, 2015 • By Tina Zhai
As we know,
Most heavy-duty trucks use dual air brake systems for safety. and stopping A
dual air brake system has two separate air brake systems, which use a single
set of brake controls. Each system has its own air tanks, hoses, lines, etc.
One system typically operates the regular brakes on the rear axle or axles. The
other system operates the regular brakes on the front axle (and possibly one
rear axle). Both systems supply air to the trailer (if there is one). The first
system is named the “primary” system. The other is named the “secondary”
system. .Before driving a vehicle with a dual air system, allow time for the
air compressor to build up a minimum of 95-100 psi pressure in both the primary
and secondary systems. Watch the primary and secondary air pressure gauges (or
needles, if the system has two needles in one gauge). Pay attention to the low
air pressure warning light and buzzer. The warning light and buzzer should shut
off when air pressure in both systems rises to a value set by the manufacturer.
This value must be greater than 60 psi.
The warning light and buzzer should come on before the air pressure drops below
60 psi in either system. If this happens while driving, you should stop right
away and safely park the vehicle. If one air system is very low on pressure,
either the front or the rear brakes will not be operating fully. This means it
will take you longer to stop. Bring the vehicle to a safe stop, and have the
air brakes system inspected and repaired
To some this, up the various brake components in an air brake
system work together to create and maintain a supply of compressed air, direct
and control the flow of that air and to transform air pressure energy into
mechanical braking force.
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