claya
Cast Iron
- Joined
- Aug 6, 2006
- Location
- california
Sinker EDM, but the following applies to any pump based fluid system.
If the dielectric is foaming a lot, or there are bubbles in the outlet what does that indicate? I can hear the pump cycling (cavitating??). The fluid is basically brand new. The cavitation is about every 5 minutes...
Actual pump pressure is OK (15-18 psi) at startup, but then it slowly drops to basically 1psi. When it starts cavitating, the pump pressure rises to ~10psi during the cavitation, then drops again.
Is the pump losing prime, then recovering like a vac leak? Or is the pump pickup getting restricted? There is a simple filter on the pickup. The dielectric is new, but it does not look like what I would call clean in the sinker tank when filled.
Filter pressure is steady at 5psi, then rises to 12psi when the pump cavitates. Pump sounds like ball bearings. 20gal in the tank.
According to the book, the pump pressure should be 35-40psi. I have never seen it that high. The machine is 1986 era. Maybe the pump is super worn? Or there is a shaft seal that is bad?
If the dielectric is foaming a lot, or there are bubbles in the outlet what does that indicate? I can hear the pump cycling (cavitating??). The fluid is basically brand new. The cavitation is about every 5 minutes...
Actual pump pressure is OK (15-18 psi) at startup, but then it slowly drops to basically 1psi. When it starts cavitating, the pump pressure rises to ~10psi during the cavitation, then drops again.
Is the pump losing prime, then recovering like a vac leak? Or is the pump pickup getting restricted? There is a simple filter on the pickup. The dielectric is new, but it does not look like what I would call clean in the sinker tank when filled.
Filter pressure is steady at 5psi, then rises to 12psi when the pump cavitates. Pump sounds like ball bearings. 20gal in the tank.
According to the book, the pump pressure should be 35-40psi. I have never seen it that high. The machine is 1986 era. Maybe the pump is super worn? Or there is a shaft seal that is bad?