I am working on a old 690b track hoe,all I can get is 1000psi hyd. pressure everywhere I check,boom,swing,track motors,etc.I don't know if I am by passing oil or have a weak pump.Any help will be appreciated.Steve931 Thank,s:usa :usa
Low pressure Wow, it's nice to be able to post! I have a 690A and have some service manuals if it wound help. I believe the 690A and 690B are very similar other than the undercarrage. Legdoc
690b It is nice to have this forum, I have told the owner to pull the hyd. pump so I can have it checked. I appreciate the offer on the manuals I will let you know. Steve931
Just a quick thought, if you are bypassing a lot of oil you may get rapid heat build up in the tank due to the leak
Thanks for the offer. Yes, this forum is nice to have. Sorry about being so long on this reply I had forgotten about this machine util the other day the owner called and ask if I would take another look at it (This time he said he would pay me) he wanted to try and sell it. Again thank's steve931
690 reply :usa:notworthy:usaThanks for the offer. Yes, this forum is nice to have. Sorry about being so long on this reply I had forgotten about this machine util the other day the owner called and ask if I would take another look at it (This time he said he would pay me) he wanted to try and sell it. Again thank's steve931