Air pressure is gone, stuck in a Monaco Dynasty

Glad that you got it fixed. Don't drive longer than necessary with the dryer bypassed as the only limit on excessive air pressure buildup is the relief valve in the air tanks. You'll see 150psi or more on your gauges and hear a new banging sound as those relief valves work. The one way check valve is a $15 part and easily replaced. Anything more than that and you should look into a replacement dryer. Been there, done that! Bob