60" MMM Height of Cut Adjustment Issue
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Thread: 60" MMM Height of Cut Adjustment Issue

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    60" MMM Height of Cut Adjustment Issue

    Learned something earlier this week that might help someone else. When I first got the tractor home, I noticed it cut far to low for my liking on the highest setting. The operator's manual outlines the deck adjustment procedure, so I followed it - and the mower was still far to low. So I remove the deck and slide under the tractor for a closer look. There is a linkage connection between the mid lift and the rear lift - notice the three bolts attached to the linkage:

    Click image for larger version. 

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    The above linkage can be easily accessed from the left rear of the tractor:

    Click image for larger version. 

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    Raise the lift fully. Loosen the three bolts on the linkage with a 5/8' wrench. If you have help available, have your assistant lift the Auto Connect coupler assembly to maximum height and hold it steady while you re-tighten the bolts. You might be able to do this by yourself if you disconnect the Auto Connect coupler assembly and push the mower lift link - it may stay in the full height position without the weight of the Auto Connect coupler assembly pulling it down. I don't know for sure since I had my son there to help.

    Here are some more photo's that may be helpful:

    Click image for larger version. 

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    Above photo is the MMM Auto Connect coupler assembly in the "Install" position.


    The next photo below is the "Height of Cut" adjustment as viewed from the underside of the tractor in the "Install" position. Note the position of the mower lift link in the cam:

    Click image for larger version. 

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    The next photo is of the "Height of Cut" adjustment as viewed from the underside of the tractor in the "Lock" position:

    Click image for larger version. 

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    Here's the "Height of Cut" knob. It won't turn completely to the "Lock" position for some reason. When I get time, I'll see if I can figure out why and adjust it as well:

    Click image for larger version. 

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    MMM adjusted to full cutting height - much better:

    Click image for larger version. 

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    Keeper of the GTT Cookies dieselshadow's Avatar
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    There should be clearance between the height cam and the linkage when the mower is in the fully raised position. You'll probably need to readjust your lift strap to accommodate this. The procedure is covered in the "1 series mower setup and adjustment" sticky thread located at the top of the SCUT forum.
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    Quote Originally Posted by dieselshadow View Post
    There should be clearance between the height cam and the linkage when the mower is in the fully raised position. You'll probably need to readjust your lift strap to accommodate this. The procedure is covered in the "1 series mower setup and adjustment" sticky thread located at the top of the SCUT forum.
    I'm aware of that and followed the manual to the letter. Even after that adjustment, the mower was still too low and the "Height of Cut" adjustment would not go to the lock icon on the knob. Not until I adjusted the other linkage did it even get close to the lock icon.

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    Keeper of the GTT Cookies dieselshadow's Avatar
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    Quote Originally Posted by JohnFromOKC View Post
    I'm aware of that and followed the manual to the letter. Even after that adjustment, the mower was still too low and the "Height of Cut" adjustment would not go to the lock icon on the knob. Not until I adjusted the other linkage did it even get close to the lock icon.
    Did you read the sticky thread? It clears up some confusion when it comes to the adjustment. More pictures too.
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    110 round fender in the shop for crustoration
    Ferris IS3200Zzero turn mower

    Quote Originally Posted by Gizmo2 View Post
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    Quote Originally Posted by dieselshadow View Post
    Did you read the sticky thread? It clears up some confusion when it comes to the adjustment. More pictures too.
    I did read it. Looking at your adjustment knob, it looks like yours stops just short of the lock icon too.

    I did the same thing you did - however, that linkage connecting the rear lift to the mid lift was the reason my cut was too low even though adjusted per the operators manual. That particular linkage is not mentioned in the manual.

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    Keeper of the GTT Cookies dieselshadow's Avatar
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    Mine would easily rotate 360*. The lift strap was/is mentioned in my manuals?
    - Jason

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    Ferris IS3200Zzero turn mower

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    The lift strap was discussed in my manual.
    1025r TLB w 60D MMM & Independent Lift
    SN 114287 Built April '13 received 8/21/13
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    I used some Fluid Film on mine and it works way better now. Mine didn't want to spin before. Almost like it was binding.

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    OK - I now see that linkage on page 5, post #50 of your thread Diesel.

    I just went straight to the manual for the adjustment and when it didn't work, I went to looking elsewhere on the tractor for the cause.

    Dang - thought I had actually discovered something new and wonderful to share.

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    Keeper of the GTT Cookies dieselshadow's Avatar
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    Quote Originally Posted by JohnFromOKC View Post
    OK - I now see that linkage on page 5, post #50 of your thread Diesel.

    I just went straight to the manual for the adjustment and when it didn't work, I went to looking elsewhere on the tractor for the cause.

    Dang - thought I had actually discovered something new and wonderful to share.
    You're good! Don't feel bad, you were trying to help others here, I appreciate that.
    - Jason

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    , Ken's weld-on hooks, Fit Rite Hydraulics Top and Tilt kit, Artillian forks.
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    110 round fender in the shop for crustoration
    Ferris IS3200Zzero turn mower

    Quote Originally Posted by Gizmo2 View Post
    Dieselshadow is my Hero.


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