How does a Wabco air dryer work?
During system pressure build-up, compressed air passes into the air dryer where the filter system removes contaminants and passes the air into the drying stage. Moisture-laden air passes through the desiccant bed in the air dryer cartridge and moisture is retained by the desiccant.
Why does my air dryer keeps purging?
When the air pressure becomes greater than that of the preset “cut-out”, the governor controls the unloader mechanism of the compressor to stop the compressor from building air and also causes the air dryer to purge.
What is the purpose of the turbo cut off valve?
A blow-off valve (BOV), dump valve or compressor bypass valve (CBV) is a pressure release system present in most turbocharged engines. Its main purpose is to take the load off the turbocharger when the throttle is suddenly closed.
How often should you change air dryer filter?
Maintenance
- For severe service applications, such as residential refuse trucks or school buses, the air dryer cartridge should be replaced every year or 100,000 miles.
- For pick up and delivery operations, or for double- and triple-trailer line haul trucks, every two years or 200,000 miles is recommended.
What is drying and distribution unit?
Other Details: The Drying and Distribution Unit (DDU) combines the function of the Air dryer with an unloader valve, a purge tank and a Quadruple System Protection Valve (QSPV). Feature: The special features of DDU are listed below. Air Drying – Removes moisture completely from the compressed air.
What causes air dryer failure?
Air dryers may fail due to leaks; clogs; worn parts and electrical issues. Air leaks are one of the most common reasons for failing air dryers in trucks and should be checked regularly. Clogs can lead to poor filtration in the system and block purge valves; and worn parts, such as seals, can invite pressurized air in.
How often should a air dryer purge?
Air Tanks and Purge Valves A second simple step toward keeping the air system moisture-free in winter is manually draining the air tanks – periodically, based on the truck’s air usage. Up to once a month for vehicles with high air demand or every three months for a typical line haul truck is recommended.
At what pressure does the air dryer purge?
To prevent system damage, the ignition switch must be turned off manually if the system pressure reaches 130 psi. – Build system pressure to governor cut-out, wait two (2) minutes for the air dryer purge completion. Note the pressures on the dash gauges, then watch the dash gauges for two (2) minutes.
How often should a typical air dryer in a linehaul truck be overhauled?
For severe service applications, such as residential refuse trucks or school buses, the air dryer cartridge should be replaced every year or 100,000 miles. For pick up and delivery operations, or for double- and triple-trailer line haul trucks, every two years or 200,000 miles is recommended.
How many digits are in a wawabco product number?
WABCO product numbers are composed of 10 digits. There are deviations where wheel brakes are concerned. (Product Number Extension VT = saleable Spare Part) Production date Type of device Variant Status digit 0 = New device (complete device) 1 = New device (subassembly) 2 = Repair kit or subassembly 4 = Component part 7 = Exchange unit
How do I find the terms of delivery for my WABCO product?
The terms of delivery can be obtained from your WABCO contact person. Figures are not used for product identification because prod- ucts may look the same. The 10-digit WABCO product number on the type label is used for identification. Informations about products Exchange Unit: This attractive offer requires the return of old devices.
Where can I find authoritative descriptions of WABCO products?
You will find authoritative descriptions in the outline drawings in our online product catalogue INFORM at www.wabco-auto.com. There you will also find current price information. WABCO reserves at any time to change his product pro- gramme and can not ensure the ability to deliver of any prod- uct.
Can WABCO guarantee delivery of a prod-UCT?
WABCO reserves at any time to change his product pro- gramme and can not ensure the ability to deliver of any prod- uct. The terms of delivery can be obtained from your WABCO contact person. Figures are not used for product identification because prod- ucts may look the same.