Posted by JD Seller on August 10, 2013 at 20:06:33 from (208.126.196.144):
In Reply to: 158 loader problems posted by Larry Metzgar on August 10, 2013 at 18:05:38:
I do not know what a "pass through" valve is. Unless your are calling a power beyond block a pass through valve. Is this "pass through valve" bolted between the SCV and the rock shaft housing??? If it is then it just a supply and return port. Nothing to go wrong in it other than to leak.
If the loader is working on the up and down cylinders then the supply is working. You could just have a bucket cylinder that is bad internally. It is leaking all of the oil from the pressure side to the return side.
Check out the plumbing to the bucket cylinders. You could have the lines crossed. Where you are applying pressure to both side of the same cylinder. This would make it hydraulically locked. One set of hoses is teed and hooked to one end of each cylinder, not both ends of one cylinder. Then there is another set hooked to the remaining ports on both cylinders.
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