Re: Cold hydraulics & pump cavitation
<font color=red>And how does a full system cavitate if maintained with the proper fluids and filters? I am not questioning that it's cavatating or not but I would like to know how and why now.
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I could be wrong, but here is why I think it happans. When the oil in the system is cold it gets a lot thicker. The pump trys to suck the oil from the tank, but the oil is so thick, it does not flow to the pump. Think of sucking Jello through a straw. It is not going to come up the straw like water, it will come up in blobs of Jello. Thats what the oil does, and inbetween each blob is a little pocket of air.
My Ingersoll is fully hydro powerd, and also uses motor oil for the fluid. In the cold she does make a racket. I start it up, let the motor warm up, then put the trans in nutrul.[hydro driven two speed trans] then send psi to it. That spins the drive motor, with very little load on it, and lets it warm up. When its REAL cold, it will almost stall the motor. After a few min, its fine.