Its not hard to do. but first- do you grease the hst pedal regularly?
Second- it you need the MMM off if you have one. in the rear,underneath the tractor towards the FEL stick side, is a nut that you can adjust that has a spring behind it. ( just follow the gold bar connected to hst pedal to rear) .using a deep socket and extension, you can adjust it to your liking. do a half to full turn at a time and test.
Sorry I dont have pics, but can take one later today if needed