Turning pump up on tractor

[Big_Lug]

Does anyone know if and if so, how to turn up the pump on a Branson 2810. I would like to get a few more HP out of the motor. I know you can do it on high HP tractors but, I don't know about smaller machines. Any info. Please. My tractor is nearly out of warranty so this is not an issue.

 

[MicroPilot]

Can you explain with a little more detail what you mean by "turn up the pump"?