11-28-2023, 06:24 AM
It could be the blow off valve on the air drier is leaking. It opens and closes based upon the pressure in the system. The engine compressor runs ALL the time being gear driven. The blow off valve opens and closes to allow the compressor to either freewheel OR provide compressed air into the system.
If that valve were leaking it would allow air to pass backwards into the compressor.
You can buy a rebuild kit, but most people find it just as economical to replace the unit.
It is likely a Bendix AD 9 or AD 7.
Word of caution, do not futz with that valve in the middle of your trip unless you have the parts to replace it. IF it fails to reseat, you will not be going anywhere until you get a new one.
If that valve were leaking it would allow air to pass backwards into the compressor.
You can buy a rebuild kit, but most people find it just as economical to replace the unit.
It is likely a Bendix AD 9 or AD 7.
Word of caution, do not futz with that valve in the middle of your trip unless you have the parts to replace it. IF it fails to reseat, you will not be going anywhere until you get a new one.
Richard and Rhonda Entrekin
99 Newell, 512
Maverick Hybrid Toad
Inverness, FL (when we're home
)