hi and thanks,
my RV has Ride Rite ( MHA 90 F ) lifters and it looks like I have a dual air control system with it. If so, I don't know where the compressor is or how to use it.
There is a gage on the dash that shows PSI and a silver knob below it. Don't know what it does or if you push it or pull it.
There's also a gage that shows vacum, I'm assuming this has to do with the brakes ? Thank's in advance, Jim