I am still at a lose on this issue with my blade on this Excavator. .I have replaced the spool valve for the blade up and down. .I have had the cylinder checked and its good to go .Blade will not hold the machine up at all ..raises it fine. .let go of the handle and machine slowly drops back down. .If anyone has any ideas on what next to check would be great. The Rotary Joint is good. no leaks can be seen from it. I am at a lose here for what it could be causing the blade not to support the machine. It was working fine and all the sudden just dropped.
Kubota KX161-3ST Front Blade Issue
- Thread starter TFordALA
- Start date
Maybe you should have the cylinder rechecked for internal leakage. About all that's left is linkage. Are you sure the lever is moving it's entire throw? I have had dirty/unlubricated linkage case strange problems on my mini's.
Might be better if you would just keep one thread going, rather than starting a new thread each time you have a new thought.
How did you determine the rotary joint is good? You will not see internal leakage just looking at the outside of the rotary joint.
Obviously if the cylinder is not holding, leakage is occurring somewhere.
Ive checked all the linkages and they all move easy and nothing in the way and fairly clean.
Your right but where could it be..if it was being forced back through the rotary joint it would be making either a drive motor move or the swing on the blade move but it does none of this. I am still thinking it could be the cylinder and I had it checked and was told it was fine. I replaced the spool vavle and all o-rings and no leaks from control valve anywhere.
Have you had the pump pressure checked? If the pump is weak or you have a valve problem in the christmas tree this can happen.