So this is the first time I have posted on this site, I have a KX91-3S2 excavator that when cold the dozer blade will raise well, but as the machine is in use the blade will not raise, it will go down and appears to not bleed down. I have replaced both soft hydraulic lines, the problem use to not show up for several hours of use, but now after 15 minutes I am experiencing this problem. the only way to raise it, is to put it into float mode and raise it with the bucket, then lock it into place. thanks for any help someone might have experience with this issue.
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