Thumbwheel on Wacker Neuson

[sgrams]

I recently connected a brush mower to my WN ST31, the mower runs fine on the machine but I am required to continually hold the thumbwheel in the forward position otherwise the hydraulic flow stops, I can't use the mower all that well as the terrain is rough, I can't seem to find any button or information in the owner manual, the machine works fine with grapple and snowplow, would there be any way to keep the flow activated? The machine is a 2023 model, I bought it used with 150 hours, a rental and not used it much since I bought it last Sept, I have run the machine up 2,300 rpm but it seems not to keep the flow. Thanks for any help!

 

[foton]

on my 2017 sw-20 there is a switch on the left cab support that goes between standard flow and high flow (my machine does not have high flow but it has the switch) but I set it to standard flow. then I set the thumb wheel to run the direction I want and then pull the trigger on the same handle,that sets the aux.hydro to constant on. either the switch or activating the trigger again turns it off. If you are running anything with a hydro motor that does not have a case drain, I would let the rpms down slowly before a turn off of the attachment.