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29 Cards in this Set
- Front
- Back
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Air Compressor |
Takes air from atmosphere and pressurizes it |
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Governor |
Controls start and stop of air flow from the compressor to storage tanks |
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Supply tank |
Stores air from compressor. First tank in line |
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Drain valve |
Mounted on all storage tanks to purge contaminants |
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Safety valve |
Governor fails to cut-out, safety valve protects the system from excessive pressure |
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Air Dryer |
Air Dryers remove moisture and contamination from the air and then back flush into the atmosphere when the governor cuts out the compressor |
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Inline alcohol injector |
adds small amount of alcohol vapor into the system to prevent any moisture from freezing. |
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Secondary Service Tank |
Holds the pressurized air that is used for secondary circuit service brake applications |
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Air pressure gauge |
Shows air pressure in each service tank |
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check valve |
prevents air from flowing back to the supply tank if there is a failure in supply circuit (one-way) |
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Low air pressure warning device |
low pressure warning light is located on pressure gauge |
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Front service brake chambers |
The brake chambers consist of two circular metal housing held together by a clamp ring. Inside the chamber are rubber diaphragms, push plate, and push rod. |
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Foot control valve |
The foot control valve regulates the flow of compressed air from the tank when it is needed for braking |
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Quick release valve |
The quick release valve allows quicker exhausting of air pressure from front brake chambers when brakes are released |
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service relay valve |
reduces brake lag installed near the brake chambers. a supply line is connected to the service tank ensures rapid supply of high volume air to the brake chambers and release of air pressure |
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Primary service tank |
Holds the pressurized air that is used for secondary circuit service brake applications |
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Drive axle service brake chambers |
The brake chambers consist of two circular metal housing held together by a clamp ring. Inside the chamber are rubber diaphragms, push plate, and push rod. (Drive axle) |
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Service control line |
Connected from floor control valve to relay valves regulating air flow. |
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Spring/park brake |
The spring park brake chamber contains the a second diaphragm, a large powerful coil and an intermediate push rod that is used to transmit the force of the coil spring to the service brake push rod when the spring park brake is applied. |
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park control valve |
yellow button on dash. Pushed in to release park brake. |
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Double check valve |
directs air to system using air from the highest pressure tank (primary or secondary). in case of circuit failures. |
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Glad hand couplers |
The two air lines are connected to the trailer used for quick coupling. |
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Supply or emergency line |
Supply line deliver air from the tractor service tanks (primary and secondary) to fill the trailer tanks and release the trailer spring park brakes, also release emergency brakes (park brakes) |
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Trailer air supply valve |
Used ti open and close the emergency supply line to the trailer |
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Service control line |
carries regulated air pressure from the tractor to signal relays in the trailer's brake circuits. Delivered from either the hand valve or the foot valve |
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Trailer hand valve |
apples trailer service brakes independently of tractor brakes. (also passes through a double check valve to prevent exhausting air pressure to foot valve |
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Tractor protection valve |
The tractor protection valve opens or closes the service air line according to when the supply line is charged |
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Trailer service and spring park brake chambers |
same as other chambers |
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none |
none |
