102c3 tag axle air leak

Jcparmley · August 09, 2019, 04:45:53 PM

I have a 102c3 that has a air leak in the tag. I can't air up the bus to move it to a new location in my storage lot. Is there a way that I can shut off the air to the tag axel? I have looked through my manual and can't seem to find what I am looking for.

buswarrior · August 09, 2019, 06:21:57 PM

Inside curb side engine access, up high just inside the door, two valves, one each side.

Happy coaching!
Buswarrior

jraynor · August 09, 2019, 07:21:58 PM

Shouldn't unloading the tag axle dump the air from the bags without releasing air from the system? Not sure if you have that switch or not.

Jcparmley · August 09, 2019, 08:10:04 PM

I do have the switch, but what I wanted to do was turn off the air going to the tag axle. Basically i want cut off the air going to the tag entirely so the bus will air up.

Quote from: jraynor on August 09, 2019, 07:21:58 PM
Shouldn't unloading the tag axle dump the air from the bags without releasing air from the system? Not sure if you have that switch or not.

Scott & Heather · August 10, 2019, 04:30:42 AM

Engine bay door curbside as was mentioned. Turn off both valves that are sitting on the tag axle fender. It will release the air to the tags and not allow any to go into them. But I will say that the air going into your tag bags is minimal compared to the rest of the system so if you're just trying to save time it won't save much.

buswarrior · August 10, 2019, 05:33:30 AM

Tag unload switch only releases partial air pressure, if it is working correctly, it does not isolate the tag from the air system.

As noted, the valves will close it off.

Steering gets light, if you go for a drive with them isolated, and tag tires will be sliding under braking, flat spotting them.

Not good, thump thump thump in time to road speed afterward...

Happy coaching!
Buswarrior

Jcparmley · August 10, 2019, 09:15:08 AM

I can't seem to find where The leak is coming from. I've sprayed a bunch of soapy water but I'm still unable to isolate it. What's strange is that there is air in the various tank except the front one under the driver. When I push the drain valve no air escapes. However, there is air in the tanks in the middle of the front tires, as well as in the large valve under the driver in the compartment. Any thoughts of why the tank under the driver wouldn't be getting air?

buswarrior · August 10, 2019, 10:45:46 AM

Massive leak in auxiliary system.

So, from your description, air suspension related, down the back.

Leaking air sounds are the devil, they bounce and seem to be coming from over there, when the leak is over here.

If you can hear it, you will be able to feel it.

Keep at it, you'll find it!

Happy coaching!
Buswarrior

chessie4905 · August 10, 2019, 03:58:08 PM

Just make sure the drain valve is clear. Open and probe with a piece of wire. That would suck doing your diagnosis and finding that tank drain is plugged. Also a remote feed from an air compressor far enough away or around a corner to isolate it's noise would be very helpful. And you can later mount it in coach for bringing up air in campgrounds or wherever to get everything up to pressure before starting engine. Time for a trip to Harbor Freight or Home Depot?