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Anyone ever had trouble with one of these bypassing? My combine is not pulling right in 2nd or 3rd it sounds like oil bypassing right under my left foot.
 

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You should replace the needle and seat in the inching valve. Then recheck the pressure before adding shims. 6500 to 7000psi
 

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It must be the presurre releave valve. I'm not sure but I think u activate that when u step on the inching valve. Anyway you can shime up the pressure releave valve but u have to hook up a pessure gauge to chech it. Factory setting was about 6900 psi for a 2388, I've gone up to 7400 without trouble. Helps alot when u have rear wheel assist and run in a lot of mud.
 
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