I have a Ahlmann AL6 loader with a Deutz engine (2-cil) and Bosch Rexroth hydrostatic transmission (A4G). It works very well in forward en reverse when a drive very slow. When I drive forward in normal speed he "jump" into a fast forward mode and don't want go reverse anymore. The diesel motor makes a serious effort but there is very little power to the wheels in reverse. Only when a drive a will forward at highspeed he jump back to "normal mode" and I can drive in reverse at normal speed. Driving in reverse goes always good at all speeds (except when he has jumped to the only "forward mode"). Is there a Rexroth service manual that will help me figure out what is wrong with my loader?
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