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RobertRichard

Mid-Liner air system help

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Hi,

i am just a backyard mecanic but this truck is the frist one i see like this when the gouverner cut off , all the air produce by the compressor is blow off by the air dryer exaust not air from the tank just the exesse air produce by the compressor is it normal on a 99 midliner ???

thanks for your help

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This probably is normal

We had '86 & '87 CS300's with Knorr air compressors which are not equipped with unloading valves, they govern the pressure

in the brake system by having the excess air exit through the purge valve on the air dryer when the governor cuts out.

Ron

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thanks for the input but a have to argue with a saaq inspector ( like dot inspector ) and my batlle is far from over

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I also have a problem.... My wet tank has a lot of oil and sludge coming from it... In fact both wet and dry tanks having this issue.... Plus I can't go over 40 psi.... And no air is escaping anywhere 

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