I have a steady leak from the throttle base. Can not find any info on the pedal assembly. At 22 years old probably needs rebuilding.
I have another air leak on the switch behind the air gauge, any thoughts where to get a new one.
Working out the bugs one at a time LOL
Here is the link on my rebuild of our throttle valve. Hopefully, it is the same valve in your coach.
Williams Controls WM453109 Air Throttle Valve (http://www.foreforums.com/index.php?topic=27762.)
Might need a photo of "the switch behind the air gauge" to properly identify what it is. On our coach there is a solenoid valve that controls air flow to the air horns. Is that what you are looking at? It is a Hadley solenoid, part #H00550B. They are widely available. Google search for the best price if you decide to buy one.
Amazon.com: Hadley Horns H00550B 12 Volt Tank Mount Solenoid: Automotive (https://www.amazon.com/Hadley-Horns-H00550B-Mount-Solenoid/dp/B001FMPP8O)
On any of these old original air system switches and valves, if you can find a identifying part number, then a new part can usually be found by searching online with Google. Even if the original switch is no longer available, a suitable substitute will often be available.
This should be what you need Williams Controls repair kit #117103 but double check to make sure as we are on the road and this is by memory.
Pamela & Mike
Chuck beat us to the post button but this may help anyway.
Here is the link to my post when I had the same problem 2 years ago.
Lots of help available here on the forum!
I refer to Chuck on all my air problems.
He will know what to do or what not to do! 8)
Accelerator pedal air leak ??? (http://www.foreforums.com/index.php?topic=26936.msg218829#msg218829)
I checked the link to the rebuild kit in my old thread (above) and found it is "dead". Below is a pretty good price on the kit:
WILLIAMS CONTROLS MODEL R090DX, PART 117103, VOLVO 1113512, DOT REPAIR KIT |... (https://www.ebay.com/i/272958313377?chn=ps)
If you need the whole thing here it is.
116731 by WILLIAMS CONTROLS - Pneumatic Throttle Pedal (https://www.finditparts.com/products/563071/williams-valves-116731?srcid=CHL01SCL010-Npla-Dmdt-Gusa-Svbr-Mmuu-K563071-L367&gclid=EAIaIQobChMIyYqHj4_l1wIVCL7tCh1g9AzuEAQYASABEgLhkvD_BwE)