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Hi, have a 99 Hino FD, seems to be a small amount of oil coming from the release valve on the truck air tanks, only does this the first blow off, then seems to run fine.Does this maen the compessor needs to be replaced?Cheers Scott
Hello and welcome to Just Answer! I would be more than happy to assist you today. Under normal conditions yes the compressor is beginning or has failed internally and allowing oil to pass thru the system. if you remove the outlet line from the air comp you should see oil. That is the only way it will get in the system. The lines and dryer will have to be cleaned or replaced if oil intrusion has been found.
Experience: 16 Years working on Cummins Diesel engines,