4digger
Well-Known Member
Hello. We have a komatsu pc400-7 excavator. We are haveing problems with getting the merger valve to engage. We are having low lifting power in the boom and low steering power in the tracks. We have replaced the self pressure reducing valve do to high pilot pressure. That seemed to make all the functions a lot smoother. But lacking power in the boom and tracks. Really hoping someone could shed some light this and put us in the right direction. We appreciate any of all info. Thanks.