Long story, short.
Had the truck parked for about 10 weeks.
Started it up, air building a lot slower than it used to.
Also, all of a sudden, at 130 psi, the purge valve kocks in and stays open till gauges show approximately 110 psi. Then the cycle repeats.
What is causing the purge valve to stay open and dump air out ???
Detroit 60, 12.7. Governer mounted on air dryer unit.
Air building too slow, purge valve question
Discussion in 'Freightliner Forum' started by MercerDriver, Nov 12, 2014.
-
-
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.
-
-
What make of dryer?
-
It's a Bendix with the cartridge on top and governer that bolts right to it. -
Probably purge valve,I have a wabco that was doing the same thing. But mine was caused by road debris,hit a piece of metal dinged purge valve,cracked regen housing. If it's constantly cycling you can stop at hardware store and get some pipe fittings to bypass it until you can fix it
-
Did you fix it ?
Have exactly the same problem but on Volvo with Bendix AD-9 air dryer..
it purges at 125 psi , purge valve slowly leaking to 120 psi ( can see it on gauges ) and cycles again
Do you know what could it be ?
Thank you! -
Are you guys in cold climates? I had the same happen to me with same dryer. Took of the big line off the compressor and put some ethynol in there and whammy! Purges like a somabich.
-
Sorry. Methynol not ethynol
Trucking Jobs in 30 seconds
Every month 400 people find a job with the help of TruckersReport.