BradHend Posted August 20, 2023 Share Posted August 20, 2023 Does anyone know what these two devices do? They are monitoring the air system for something, just curious what exactly for. Also, does anyone have a picture of their air pressure regulator for a similar coach? Mine won’t shut off now, not exactly sure what it looks like. Thanks. Link to comment Share on other sites More sharing options...
Scotty Hutto Posted August 20, 2023 Share Posted August 20, 2023 Those are your air dump valves for the rear air tank. The front air tank has a separate valve - usually (on my coach and some of my friend’s coaches, anyway) up in front to the left of the generator on the firewall. Link to comment Share on other sites More sharing options...
jacwjames Posted August 20, 2023 Share Posted August 20, 2023 The governor is what controls the compressor. Mine is located on a cross member front of the engine but I have a side radiator, not sure where yours would be. 1 Air Governer.pdf 1 Link to comment Share on other sites More sharing options...
Robert92867 Posted August 20, 2023 Share Posted August 20, 2023 They are air dump valves. But since you have hydraulic brakes (not air brakes) they dump pressure from your front and rear air springs, respectively. Your photo shows the hydraulic pump reservoir next to your air release valves, so they are mounted in the engine compartment. Your air pressure regulator? Are you talking about your Air Governor? the aluminum cylinder mounted near your engine-driven air compressor, connected by a ss braided hose. You should have 2 ss braided hoses coming off the compressor, trace the smaller hose, probably no more than 4 feet from the compressor. 1 Link to comment Share on other sites More sharing options...
PeterSchweizer Posted August 20, 2023 Share Posted August 20, 2023 AIR DUMP VALVES. On my 04 Cayman 34 ft, when I press the air dump switch on the drivers left side console it releases air (slowly) from the 4 air bags thru the 2 rear valves and 1 in the front Generator compartment on the firewall. I typically do this per the instructions, for my coach, for putting out slides, First, extend slides, then depress air dump and brake peddle to bleed air off the coach. It lowers, slowly as it takes several minutes +- 10 for this to bleed off. then you set leveling jacks ( this is how Monaco instructions for my coach with manual 3 point leveling system. also follow those plastic lines and fittings to check with soapy water if your system bleeds down. Note on the side of each valve is a small bleed port with a screen make sure it clean so the bleed off is not restricted. just another item to schedule on your " routine maintenance" items on theses Beasts! Happy Trails! 1 Link to comment Share on other sites More sharing options...
BradHend Posted August 20, 2023 Author Share Posted August 20, 2023 Thanks for the input folks. Could a faulty check valve be causing my compressor to continue supplying air to the rig? I did a few full air downs and the compressor stopped supplying air when it should so I thought it was perhaps okay and was a result of sitting too long. Took it for a ride and stopped at a parking lot to check everything out. I noticed the air compressor was on again with the relief valve releasing air at the tank, did a quick step on the accelerator up to about 1200 RPM and it quit supplying air as it should. This rig, as @Robert92867 mentioned has hydraulic brakes, so there is no air dryer and no purge noise. Link to comment Share on other sites More sharing options...
jacwjames Posted August 20, 2023 Share Posted August 20, 2023 Are you sure there is no air dryer?? Link to comment Share on other sites More sharing options...
BradHend Posted August 20, 2023 Author Share Posted August 20, 2023 Quite sure. No rear air tanks either. Just one tank up front. Link to comment Share on other sites More sharing options...
jacwjames Posted August 20, 2023 Share Posted August 20, 2023 Learn something new every day👍 Link to comment Share on other sites More sharing options...
96 EVO Posted August 20, 2023 Share Posted August 20, 2023 Would have to have a governor to unload the compressor, so, if the air is really coming from your tank's pressure relief valve, either the governor is failing, or the relief valve. Link to comment Share on other sites More sharing options...
BradHend Posted August 20, 2023 Author Share Posted August 20, 2023 (edited) @96 EVO I would agree. I don’t believe it’s the relief valve at the tank at fault as you can hear the compressor working harder and the lines really vibrate when it happens. Just wasn’t sure if a check valve would cause any of this. Monaco doesn’t even put an air gauge on the dash. Just a low air light. I will check the pressure in the tank when this is happening just to confirm. Only reason I went with a basic coach like this is so anyone can drive it need be. No license upgrades needed. And it will fit at all national/provincial/state parks. Edited August 20, 2023 by BradHend Link to comment Share on other sites More sharing options...
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