Hello all. I can’t seem to get any higher than 4200 rpm on a single fan ezee on 315 air cart. Connected to 9270 case. Changed o rings on secondary and primary shuttles, flow control is at max and I confirmed pressure at remote is 2700psi. Also tried bypassing couplers by connecting fan supply hoses directly to tractor hydraulic lines. Any idea what could be causing the lack of fan rpm? Owners manual states I need at least 4800 rpm for high rate applications.