I have 425 John Deere with #40 loader I don’t have very good lift pressure I am going to change fluid and filter is there something else I should look for thank you lee
If the filter doesn't do it, then you'll need to check the pressure that's getting to the cylinders. I haven't done it but I've seen people connect a gauge either in line or in place of a line, to check what pressure is being delivered. If your pressure is low compared to the specification, you might need to adjust the relief valve.