Bx25D-1 deck hight changes while mowing.

[worm]

While mowing, cycling deck up and down, when the deck comes to rest on the deck hight cam, sometimes it lowers a notch. If I don't pay attention, by the time I'm done mowing, it will be 2 or 3 notches lower than what I started with.
I haven't had the time to pull the deck and look at it yet.
Has anyone had this problem?

 

[Tractorrr]

I had the problem with my b2920. Not sure if the height adjustments are the same but likely they are. There are some old threads about this. I'm not good at copying and pasting stuff like that but you could google "B2620 MMM height adjustment" the eighth post of that thread has a pdf of a way to try to fix it.
I was able to apply a washer at the top of the cam to give it more stability and keep it from slipping. Haven't had problems since.

I also always bring the hydraulic lever back to neutral after lowering the MMM to the cam and then close the knob that controls the speed at which you can lower the MMM. With that knob closed you are unable to lower the MMM any further. I figure that probably puts less down pressure on the cam in an effort to keep it from spinning.