5.04 Air Governor Operation
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- Опубликовано: 30 сен 2024
- Excerpt from Bendix video on the operation of the air governor in the air brake system. The complete training video can be viewed at: • Bendix Air Brake Syste...
Bendix D-2 Governor Service Data Sheet and Adjustment Instructions: 1drv.ms/b/s!Au...
Why when you turn the adjuster clockwise, tightening the spring, make the cut out pressure go down?? In my mind that would mean it takes more pressure in the reservoir to over come and cause it to unload
Great observation and you are completely right; that always seemed counter-intuitive. When you look at the service data information, at the internal workings of the governor, when you turn the adjusting screw you are adjusting the lower seat of the spring. This is why turning it clockwise actually moves it down, allowing the spring to lengthen and thereby reducing the pressure needed to reach cut-in/cut out. Turning it counter-clockwise would move the seat up and do the opposite. Here is the link to the service data with more info: 1drv.ms/b/s!AuztCXNnVSIjiXO0kAWqZOn0AC2L?e=Lo6exG
@Jim Mack hey! Thanks for the response, that definitely clears that up for me. Could not wrap my head around that haha
Fantastic illustration and explanation. This helps owner operators such as myself understand the function of the air system to better diagnose an issue. Can a faulty air compressor cause excessive crank case pressure?
Yes, I believe it would be possible for a faulty air compressor to cause excessive crankcase pressures. It is using the same lubricating oil and any blow by in the compressor would typically go into the crankcase.
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Awesome video! Thank you!
Glad you liked it!
What is the purpose of the port next to the pressure setting spring? I didn’t see that mentioned
Great question. That is the exhaust port,. 2:11, and it normally is just left open giving a way for the air to exhaust from the governor. It is a threaded port and in some cases I have seen a line connected there if they want the air to exhaust a few feet away and not directly at the governor but that is not common. For the governor to work properly though that exhaust port must remain vented.
I have 2006 Kenworth T800 Quad Axle (Dump Truck) with a Cat C-13 Acert engine.
My truck is not building air (45 minutes from 0 psi to 120 psi) at 1000 RPM.
I removed the Braided supply line at the Compressor and started the engine. I have air (no oil) but I have no idea how much. (NoGauge) I don't suspect the compressor.
I then connected 120 PSI shop air to the Braided compressor line, and still no difference.
It's hard to see but, does the Braided line from the compressor go to the air dryer or the wet tank first?
On the wet tank, there is a valve of some sort.
Why would the air go to the wet tank first? (if it does)
Something must be stuck or plugged.
HELP !!!!!, please
I need to get to work !!!!!
The braided airline would go to the air dryer first, before the wet tank. I would recommend checking the hose where the compressor pulls air from but you said you connected 120psi to the air line leaving the compressor and even that wouldn't fill your tank? That would mean it is not your compressor or air supply; it would likely be a blockage in the braided line or the the air dryer before it is getting to the wet tank. Perhaps you could bypass the air dryer temporarily to see if that fixes the problem.
@@JimMackHeavyEquipment I removed the braided line at the compressor and disconnected the other end at the air dryer (disconnected both ends) and applied 120 PSI shop air and there is no blockage. I then connected it back to the air dryer and applied shop air. It takes "forever" to build "any" air at the gauges. Since then, I have removed the air dryer filter and cleaned where it mounts, nothing to speak of. I then replaced the governor on the air dryer, and the heating element (because I was there). I am now replacing the "Check Valve" at the Wet Tank. Maybe it's stuck?
Why will it not build air?
Did you end up finding your solution? If so what ended up being the fix?
@@peterdelfs6211 I did but I can't remember exactly what fixed it. I will never let my truck sit again for 20 months :(
Okay