Black Button on B2650

[wchp12]

So i have a new B2650 and there is a black button on the top right of the display screen and when I push it it shows the different RPM's
Everything I have read says the the rear pto goes up to 540 rpm when I select the rear PTO icon with the black button and rev the throttle the number will easily go over the 540 and go much lower.

So what is this button for? I read the user book and it does not talk about it

Thanks

 

[PHPaul]

The button just selects which function the tach is monitoring: Engine RPM, Mid-PTO RPM or Rear PTO RPM.

You need to adjust the hand throttle to get the selected PTO to run at rated RPM. I really like this function as I can adjust the throttle for changing loads and be sure the implement is running at the proper RPM.

 

[skeets]

Don't push the little black button,,, that's for hyper drive