2025R MMM height issue

[Hambone]

Hey All,
Long time no hear.
My MMM height control is acting up, wondered if anyone had any ideas before I tear into it
Yo can set everything just fine, but it won't stay where you put it after mowing a bit.
Say I put it at 4" and take off, before you know it you are at 3"
Any ideas? Not really looked into this issue yet.
I did do a forum search but didnt see anything.

Thanks in advance

 

[dodge man]

I’m not sure I can answer but have a couple of questions. Generation I or II 2025r? Independent deck lift?

 

[Hambone]

I知 not sure I can answer but have a couple of questions. Generation I or II 2025r? Independent deck lift?

Thanks for replying.
Not sure, it is a 2019 model with 60D deck.
Deck lift is a rod from 3pt

 

[beenthere]

Hambone
Find out what is slipping to cause such a change.. then let us know.

A clue for us would be what do you have to adjust or change to get it set back to 4" height again, when you say "put it at 4".

 

[Hambone]

You then have to raise 3pt up, which brings up deck, then turn dial back to 4, then let 3pt back down.
Then after mowing a short distance the dial will turn down to 3, thus the deck being too close to ground.
Hope that makes sense.
I am going to try to get it into garage today or tomorrow

 

[beenthere]

Likely problem under the knob that sets and holds the height setting.. look for the spring clip (#26) being in place and not broken as seen in this schematic.
That clip is part # LVU15992

 

[Hambone]

Likely problem under the knob that sets and holds the height setting.. look for the spring clip (#26) being in place and not broken as seen in this schematic.
That clip is part # LVU15992

Thank you!

 

[dodge man]

For your info, you have a generation II, and the standard deck lift, not the independent.

 

[beenthere]

For your info, you have a generation II, and the standard deck lift, not the independent.

So dodge man, are you saying that the adjustment knob for height setting reply #6 does not apply?

Not sure what you are adding to information needed by the OP.

 

[dodge man]

No I’m not saying that sorry for the confusion. The OP probably didn’t know that there were two generations of 2025r and three different deck lift options which may or may not affect how the height setting works.