Posted by Jim.ME on April 25, 2023 at 15:52:06 from (67.242.176.154):
In Reply to: Chief 4 position valve posted by dusty082000 on April 25, 2023 at 15:07:09:
My first thought is the new valve's main relief pressure may be set higher than the old one, which would cause more engine loading when feathering and deadheading during lifting and rolling the bucket. You should check what it is set at now and adjust it if needed. I think I said before I expected your pump was 10gpm, or more. If the pump flow is higher than the valve 10gpm rating, you will see some loading when feathering through a partially open spool as the relief has to open to pass the excess flow. And if the new relief is set too high it will load the engine as the excess is pushed through the relief, even more so if the relief valve is a bit small for the pump flow.
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