I have a 2010 American Coach Tradition on a Spartan Chassis. There is an air leak when brakes depressed from the valve between the front bakes. What is the name of that valve?

Contact Keystone direct

https://www.keystonerv.com/owners-manuals

https://www.google.com/search?q=wiring+diagram+for+my+2010+Cougar+29%27+fifth+wheel

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AIR BAG AND SUSPENSION MODIFICATION WARNING:
GULF STREAM COACH, INC. DOES NOT APPROVE THE USE OF AFTER MARKET SUSPENSION AIR BAGS OR THE ADDITION OF SUSPENSION LEAF SPRINGS ON ITS VEHICLES. THESE ITEMS, WE HAVE DETERMINED, DO NOT PROPERLY SUPPLEMENT THE SUSPENSION. INSTEAD, THEY INTERFERE WITH THE RIDE AND HANDLING OF RECREATIONAL VEHICLES ENGINEERED BY THE CHASSIS MANUFACTURER AND CAN BE DESTRUCTIVE TO THE RECREATIONAL VEHICLE AND INTERFERE WITH ITS ROAD HANDLING CAPABILITIES. DO NOT USE SUPPLEMENTAL AIR BAGS OR SPRINGS ON YOUR MOTOR HOME! IF SUPPLEMENTAL CAPABILITY FOR THE SUSPENSION IS DESIRED, YOU ARE ATTEMPTING TO CARRY MORE CARGO THAN THE VEHICLE WAS DESIGNED FOR. UPGRADING WITH ADDITIONAL SPRINGS, HIGHER CAPACITY SHOCK ABSORBERS, OR COIL-OVER SHOCKS WILL ALSO VOID YOUR WARRANTY. ALWAYS BE MINDFUL THAT YOUR RECREATIONAL VEHICLE WAS DESIGNED FOR THE MAXIMUM WEIGHT TO CARRY. MORE WEIGHT IS DANGEROUS AND SHOULD BE AVOIDED. ANY MODIFICATION MUST BE APPROVED BY GULF STREAM IN WRITING, OR IT WILL VOID THE WARRANTY! GULF STREAM WILL NOT APPROVE ANY AIR BAG INSTALLATION OR OTHER SUSPENSION MODIFICATION. BEFORE MODIFYING YOUR SUSPENSION, TALK TO YOUR CHASSIS DEALER. AVOID CAUSING POSSIBLE DAMAGE TO YOUR RECREATIONAL VEHICLE.

try under the coach behind the coach batteries

Is it a P30 chassis with the auto park brake? If so, there would be what looks like a brake drum where the driveshaft goes into the transmission. That brake is always applied until the motor is running and then is hydraulically held in the release position. The mechanism is integral with the foot brake but even with the foot brake off it will stay engaged. Under the driver seat area underneath the coach is the mechanism. If this is the problem you need to figure out how to release that brake. If you can find a way to pull the cable against the spring tension and hold it there (clamp it somehow) it will free up the system. Of course if you already have the transmission disconnected from the motor then disregard all this and assume i misunderstood the problem.

Recommend contacting your local dealer for assistance.

The fuel system was installed by the chassis manufacturer. If it's on a Ford, GMC, Spartan chassis, search for those documents.

Check the switch inside the coach. Usually either the switch or the breaker fails.

check for blockage in relief valve next to potable water fill. it has a little screen that allows air to flow out as water is going in..also if you are using pressurized side check the bypass valve by water tank.

if leaking from directly from behind toilet, check connection also if leaking from back of toilet. more than likely it is the vacuum valve on back of toilet. $50 dollar part. if not leaking there. pull all drawers in bathroom out. they lift out. if the inlet for the pressurized water is there, it is probably leaking from the inside. it is a $15 part but depending on access, does is leak when hooked up to water from pressure side or does it leak with just 12 volt water system?

When you parked the coach was it off level? I have seen, in the past, a coach get parked and the weight of the coach shift back and place the transmission in a bind. You may possibly be able to hook another vehicle to the coach and slightly apply pressure in the opposite direction of which the unit shifted and see if it will free the transmission to shift out of park.