deetsch Guest Oct 13, 2001 #1 If your pump and relief valve are good it almost has to be leakage from the pressure manifold to the tank manifold in the valve stack. Probably the unloading valve is not closing completely.
If your pump and relief valve are good it almost has to be leakage from the pressure manifold to the tank manifold in the valve stack. Probably the unloading valve is not closing completely.