Having looked into this a bit further I now get the impression that the 6HP26 doesn’t have a pump flow control system like its dad, the 5HP24. It still uses a fixed-displacement internal crescent moon pump but it’s a smaller capacity (at 19.1 cc/rev) than the 5-speed because of reduced leakages and a lower cooling flow requirement in the 6-speed. The hydraulic circuit doesn’t show any flow control valve for the pump.




Sorry to have given you false hope!

Phil