System PartsPregunta 11 de 60
What is the purpose of the supply pressure gauge in the cab?
a.To show how much pressure is in the air tanks
b.To measure the vehicle's road speed
c.To display engine oil temperature
d.To count the number of brake applications
Explicación
The supply pressure gauge shows how much air pressure is in the storage tanks. Dual air systems usually have a gauge for each half of the system, or a single gauge with two needles. Watching this gauge helps the driver know the brakes have enough air to operate.
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- What happens to the spring brakes when air pressure drops to a very low level (for example, 20 to 45 psi)?
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- What does the application pressure gauge show?
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