[Geordie]

Originally Posted by missfire

Nice bus, sounds suspiciously 'allroad-esque' that behaviour. It will most likely be the same wabco compressor and valve block setup, the piston ring wears and the pump overheats and cuts out, also the system can fill with water and condensation if the air drier blocks up, which knackers the valve block, then the pump overheats and cuts out. It fires up to fill an air receiver, but if it's not using the air, it'll cut out! So control unit, valve block or compressor potentially knackered. You could get a bulletproof piston ring from a guy called bagpipingandy on the net and rebuild the compressor but a new compressor is just about as easy, costs more but less hassle! Noisy pump is usually the ring, you see folk selling allroads and saying it's the rubber mounts, but it isn't, lol. But if it's not doing anything it's probably the valve block or control unit. I'd google moisture getting in anywhere on them, and where it gets in!

Good info there, thanks.

I'll have a look when I get a chance.