RobertRichard Posted January 13, 2013 Share Posted January 13, 2013 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 Quote Link to comment Share on other sites More sharing options...
39 Baby Mack Posted January 14, 2013 Share Posted January 14, 2013 This probably is normalWe had '86 & '87 CS300's with Knorr air compressors which are not equipped with unloading valves, they govern the pressurein the brake system by having the excess air exit through the purge valve on the air dryer when the governor cuts out.Ron 1 Quote Link to comment Share on other sites More sharing options...
RobertRichard Posted January 14, 2013 Author Share Posted January 14, 2013 thanks for the input but a have to argue with a saaq inspector ( like dot inspector ) and my batlle is far from over Quote Link to comment Share on other sites More sharing options...
Neo Posted October 23, 2018 Share Posted October 23, 2018 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 Quote Link to comment Share on other sites More sharing options...
Freebob Posted January 31, 2019 Share Posted January 31, 2019 Bad compressor rings. Good luck finding them! Quote Link to comment Share on other sites More sharing options...
Neo Posted December 27, 2019 Share Posted December 27, 2019 I cleaned the compressor rings .. What I need to find now is the governor ... where can I find it Quote Link to comment Share on other sites More sharing options...
Neo Posted December 27, 2019 Share Posted December 27, 2019 On 1/14/2013 at 6:30 AM, 39 Baby Mack said: 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 Can I ask where is the governor located on this truck Quote Link to comment Share on other sites More sharing options...
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