MMM Height Adjustment Knob

[Mike_Lipke]

Take those bad boys off again and drill a 1/16" hole in the bottom.
That lets the moisture out. The new ones already come that way.

 

[ericbx1500]

</font><font color="blueclass=small">( Do you mean to manually lift on the 3-pt? The 3-pt and the mmm are both on the same lift control are they not? )</font>

Yes there on the same controll, No you don't manually lift the 3pt. When you pull your lever back to raise the mmm the lever automatically returns to the neutral position. But when you do this your actually not raised up all the way. Just pull the lever back again and you will see the mmm/3pt will raise higher. Now you will be able to turn your knob to the (top) position /forums/images/graemlins/grin.gif

 

[imported_timalabim]

Still can't get to TOP with the deck on. No problem without it.

 

[rdsaustintx]

</font><font color="blue" class="small">( Still can't get to TOP with the deck on. No problem without it. )</font>

Tim,

RAISE THE 3 POINT HITCH AND THEN TURN THE KNOB.

The knob controls the position of a stop under the deck links (which are attached to the 3ph).

Russell

 

[imported_timalabim]

I have tried several times to do this, with the deck all the way up, i can turn the knob down to 0 and up to 4 but can't get it to go to TOP. I tried holding the lever in up position while turning, still a hard stop at 4. The post above says there is an adjustment, but I can't figure out which of the mower deck adjustments would do the trick. /forums/images/graemlins/confused.gif

 

[rdsaustintx]

OK I'm stymied. Will have to crawl under and look at the thing. Will be mowing this weekend if it doesn't rain...

Russell

 

[AceDeuce]

I should have clarified earlier, but I'm in the same boat as Timalabim. I DID have the 3PH raised all the way up BEFORE turning the knob and I do have the MMM deck hangers adjusted so there is about a 1/16" gap between the deck and the hard stops welded to the frame (according to the instructions in the operator's manual). However, with the deck attached I still can't get the knob all the way around to "TOP". When the deck is off it works fine. I was wondering if there was a hidden adjustment somewhere, maybe on the knob linkage itself? I guess I'll have to mess around with it some more this weekend.

 

[kkesler]

I have this problem as well, except mine won't go to top even with the deck off.

 

[kubby]

I had this problem as well. The solution is just a couple of adjustments. There is a threaded rod with two 19mm nuts, visible from the rear between the right tire and the frame. These nuts adjust how far the MMM linkages lift when the 3PH is all the way up. Turn the nuts farther onto the rod and the mid-mount parts can lift higher, but only if the MMM support arms are not contacting the stops on the frame. If they are, the threaded angle brackets that lift the support arms must be extended (unscrewed a turn or two) so the arms do not hit the stops and prevent the mechanism from lifting as far as it has to to allow the knob to go into Top position.

I disconnected the retaining rings and clevis pins completely from the threaded angle brackets, then adjusted the 19mm nuts until the knob would easily go into Top position. Then I reinstalled the angle brackets, adjusting them by trial and error until they did not quite touch the stops at full lift and both ends of the mower were equidistant from the floor.

 

[RED4x4]

I also had this problem, it would go into TOP only with the deck removed. After a lot of checking, I discovered the right side rear link was binding on stopper(see mower operator's manual page 14 fig.B), preventing the deck from raising all the way up. My solution was maybe a little drastic on a new tractor but it worked. I got out my grinder and shortened the sleeve on the inside of the rear link to gain clearance. I also shortened up the "stop" on the top of the stopper because it was hitting the main part of the rear link. While I was under there I also shortened up a couple of mounting bolts from the operators platform that were interfering with the rear links. I hope this helps. /forums/images/graemlins/confused.gif