I recently built a system with 11/4GPM Haldex barnes pump. It has 1" intake and 1/2" outlet port. The intake is connected to the oil tank with 1-1/4" hose. The tank strainer is 20GPM rated and has a relief valve in it. I have plenty of oil in the tank.
The problem is (I think) in the oil viscosity. When it is 10F or colder my pump cavitates and the oil become muddy-milky. The pump sounds differently and with sharp "chirping". After sometime (10-15 minutes) the oil becomes clear again and the pump sound gets normal.
First I would like to know if my thoughts about low temp viscosity are correct.
If yes, how I can fix it.
Should I heat up the oil in the tank before I actually start the pump?
How i should do that if "yes"?
I use "average" hydraulic liquid, can post the cat# and brand if it matters. It would be a backbreaking expence to buy "special" oil. And it must work at winter and summer time. We have rather cold winters here in MN, below -20F sometimes. My shop is not heated....
The problem is (I think) in the oil viscosity. When it is 10F or colder my pump cavitates and the oil become muddy-milky. The pump sounds differently and with sharp "chirping". After sometime (10-15 minutes) the oil becomes clear again and the pump sound gets normal.
First I would like to know if my thoughts about low temp viscosity are correct.
If yes, how I can fix it.
Should I heat up the oil in the tank before I actually start the pump?
How i should do that if "yes"?
I use "average" hydraulic liquid, can post the cat# and brand if it matters. It would be a backbreaking expence to buy "special" oil. And it must work at winter and summer time. We have rather cold winters here in MN, below -20F sometimes. My shop is not heated....