OK, one more time, (and I do appreciate the help).
Low pressure when cold. Comes up very slowly. When almost up to normal pressure, after about 15 minutes of idling, I start getting the lifter noise. That stays for about 5 minutes and then it's gone and I'm fine the rest of the day. Unless I shut it off for 30 minutes or more, then the same thing. Once warm and running, it's all just like new, normal pressure, no noise.
If the bypass valve is very clogged, that wouldn't affect pressure? Everyone else has told me the opposite. If oil can't flow well through the bypass, surely that affects pressure, can't see how it couldn't.
Scenario: Cold start, oil thick, bypass valve sticky and clogged. Where would the oil go? The valve is open, bypassing the filter, so the only route is through the valve and it's clogged. Has to affect pressure.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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