msham87

Thanks for your reply. In-motion braking has been fine and air pressure readings have been consistent. Both front and rear pressure gauges drop by 5-10 psi when brakes are apply but quickly return to normal range of 120-125 psi in the normal recovery time of 20-30 seconds. Your suggestion about a compromised or failing booster cylinder might help. Am I correct that this cylinder comes into play when using the parking brakes but not when using the in-motion brakes?

I have a 2000 Forest River Reflection Class A motorhome with a Spartan chassis and air over hydraulic brakes. When engaging the parking brake (by pulling the yellow dash button), I hear air being discharged which seems to indicate the engagement of the brakes. However, the brakes do not seem to fully engage and on a slope, will not hold the motorhome. The brakes on the motorhome were replaced less than 5,000 miles ago and have only been used on long distance travel. Any suggestions?