Repair or replace purge valve.
Air dryer governor valve.
The purge piston moves in response to air pressure causing the purge valve to open to atmosphere and partially closing off the supply of air from the compressor this will be.
Air governor not working properly.
Wabco air dryer components.
2 figure 2 ad is air dryer and reservoir system charge cycle compressor governor purge control channel desiccant bed delivery check valve open purge reservoir primary port pri purge valve closed turbo cut.
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Wabco type air governor for system saver 1200 plus air dryers.
Wabco air valve components.
Install air dryer or automatic drain valve.
Axle beams and assemblies.
This suspends the delivery of compressed air to the bendix ad 9si air dryer.
Similarly the governor also supplies this air pressure signal to the purge valve.
Check governor cut out setting.
The pressure moves the air dryer purge.
Axle assemblies hub to hub 20 10 stud axle assemby hub to hub 73 track.
Valve assembly figure 3 ad 9 air dryer purge cycle governor unloader port to the ad 9 air dryer end cover control port.
Air dryer leaks from purge valve.
Locate leak s and repair.
Alter determining air reaches purge valve.
Readjust if necessary or replace governor if faulty clean or replace line.
The governor unloads the compressor by allowing air pressure to fill the line leading to the compressor unloader mechanism.
Inspect governor per manufacturer s instructions.
Test with shop air at 150 psi.
Governor gasket special gasket see note 6 governor non adjustable 130 psi cut out small o ring bolts check valve body spring large o ring adapter figure 7 ad is air dryer and reservoir system delivery check valve cut out pressure a 1 bubble in 10 seconds is acceptable see figure 7 throughout this procedure.
Home truck trailer air system air valves governor valves.
Air system leaks such as compressor discharge line air dryer reservoirs brake or suspension valves etc.
Repair or replace as needed.
Pressure protection elements.
Cycle of the air dryer.
Operation operating tests or remanufactured unit or repaired with genuine bendix parts start the vehicle engine and build up.