/ 640 loader issue #1
I have a JD 6410 with a 640 loader and have lost power on the raise/lower function. It will raise slowly if empty, but won't lift anything. The curl function works fine, I can raise the tractor off the ground with the bucket. I thought I may have a bad boom cylinder so I rebuilt both of them. I also replaced all the hoses as they were showing their age. All the quick connect couplers were checked and are working properly. Which led me to investigate the tractor side for a cause. The raise/lower cable was damaged in an attempt to adjust it, so it was replaced. Is there something in the spool valve that could cause me to have a weak raise/lower function? It was being used prior to this to move some large rocks and trees without any issues, and then I was suddenly unable to lift a bucket of manure. Any help is appreciated.