BX25 MMM 'Up Position'

[kb9okb]

So I just bought a used BX25 and love it so far. However, I am having problems getting the mid-mount-mower to lock in the upmost position... no matter what I do it raises and lowers when I raise and lower the 3 point hitch... I have tried the 'cutting height adjustment' on both extremes. I have it adjusted as far as it will go (on 4) next to 'TOP' - but not exactly on 'TOP' - is there something special I need to do to get it to lock 'up?' I've tried pushing in on the button, pulling up, etc.

The adjustment does let it 'stop going down' at a higher position when on 4 vs. when it's set on 1 and goes all the way down, but it's still too low and drags when I'm operating a box blade, etc.

Please help... thanks!

 

[RaydaKub]

Welcome kb9okb! You've come to the best tractor resource on the planet.

OK, I don't know how BX25's differ from BX2230's, but here's a thread I started about my mower height control.
http://www.tractorbynet.com/forums/kubota-owning-operating/222715-mower-height-limit-control.html

In my case, the whole bracket was broken off the frame. So, when you twist the control, does it feel firm or does it wiggle all over the place? It should be firm. Does your mower stay up at at setting at all? If it does, then the height control is at least in place. Good luck!

 

[kb9okb]

Yes, the adjustment is solid and it does affect the height at which the mower stops descending. But it does not lock it in the up position, it merely changes it from sitting all the way on the ground to about half-way up, but far from the TOP position, i.e. the position it's in when the 3 pt hitch is elevated completely.

 

[uglyboywith11fingers]

On my BX24, which I think is the same as a BX25 in this regard, I raise the mower deck using the hydraulic control lever, then rotate the cutting height control knob to the 'TOP' position.
My mower deck does not go down when using my 3 pt hitch.
Your issue is perhaps that you can't move your knob to the TOP position...
Time to slide underneath to see why... maybe some lubrication required ?
I also raise my guage wheels to the highest position for maximum ground clearance.

Pete

 

[94BULLITT]

When you raise your deck are the bump stops contacting the frame or is there a big gap?

 

[kb9okb]

Okay that's good to know. Does the knob 'snap' into the top position? Also, is the top label exactly aligned with the arrow? You may be right... mine only seems to go to '4'

 

[kb9okb]

Where are the bump stops / how can I tell?

 

[94BULLITT]

I know there is one on the right front of the deck, it looks like a piece of angle kinda, and I think a bolt contacts the left side but I am going from memory.

 

[HeLa]

Did you buy the machine new? If so, and the dealer installed the deck, then it *should* be properly adjusted. I found that mine needed a little fine tuning.

If it hasn't been done, or you're not sure, it can't hurt to break out the manual and your deck gauge to make sure everything's right. If the deck isn't going up high enough, the height adjustment wheel will block and you won't be able to set the TOP setting.

There are a few settings on the deck that need to be checked to ensure that it's level, but this one would be my guess for your current issue.

 

[GolfAddict]

Okay that's good to know. Does the knob 'snap' into the top position? Also, is the top label exactly aligned with the arrow? You name be right... mine only seems to go to '4'

Yes, it should "snap" or click into that position just like when moving it to the other height settings, and it will then be lined up with the arrow. It sounds like you are not able to rotate it into the Top position. I have the problem on occasion - sometimes it will rotate right in, other times I have to fiddle a bit. I'll drop the deck down, lift it back up, wiggle the knob a bit... (btw, make sure to lift long enough that the 3pt lift arms are all the way up)

If it's giving me a bit of hassle, I've found that if I rotate it around the other way it will then go into Top. That is, go all the way down to zero then on to the Top position rather than going "up" past 4 into Top.

I know it's time for me to get out the manual and make some minor adjustment, but since I can always manage to get it into Top with just a few seconds of fiddling I haven't bothered to yet...

 

[kb9okb]

Thanks Hela, Golf... I think that's exactly what is happening- I just can't get it to go into the 'TOP' position. I bought it used so I suspect the previous owner put the mower deck back on to sell it and perhaps it isn't adjusted just right. I'll also note that I don't notice any bumps or clicks when going through the other positions either (1-4). I'll have to try it again tonight, not sure what to do differently though, i.e. specifically what to change / adjust.

 

[BXpanded]

The heght adjustment "Top" position holds the deck in the fully raised position regardless of the 3 point hitch position. Raise the deck completely and turn the height adjustment to "Top". If the knob won't turn to "Top", do the following:
Looking at the rear of the tractor, just inside the left rear tire is a linkage that controls the lift. There will be a gold colored bolt that faces rearward. Loosen the lock nut on the bolt and screw the bolt in one turn. Raise the mmm all the way and see if the knob will turn to the "Top" position. If not, turn the bolt another turn and try again. It shouldn't take more than a few turns of the bolt unless something else is out of adjustment.

 

[TripleR]

My dealer said to be sure when raising to the TOP position to keep the lever from kicking back to the mid position to be sure it has raised fully.

If that doesn't work, you may need to adjust the lift linkage by following the steps in your manual. I found it all easier to understand by pulling the deck out and looking at how it all works, pretty simple really.

 

[RaydaKub]

Again, I will assume that the BX25 is similar to the BX2230. If you look at the picture in my thread at
http://www.tractorbynet.com/forums/...79-mower-height-limit-control-mowerheight.jpg
you will notice the stepped cam (part 160) that creates the different heights. This knob should spin all the way around.
The top of this cam has flat sides on it like a large nut. There is flat spring (part 210) that pushes against these flat sides to "lock" the knob into the settings. But it should spin all the way around.

I think the guys mentioning the stops are onto something.

 

[rlsmith]

On my BX23 I found just like Triple R said that you will need to hold the lift lever so that it does not kick back to mid/neutral position until you can turn the knob to the top setting. Then remember when you do that you will need to do again when you want to turn the knob again from the top setting to your adjusted height setting.

 

[BXpanded]

Guys, Just to avoid confusion, the BX2230 and BX23 are different than the OP's BX25. The linkage is different and there is no feed back rod, etc.

On the 50 and 60 series tractors like the BX25, the adjustment is usually quite easy as I described about 4 posts above.

Look at the back of the tractor and notice the big gold colored bolt just inside the left rear wheel. It's really obvious since the head faces rearward and it is gold colored. Loosen the lock nut and screw the bolt in a turn at a time until the knob will turn to the "top" position when the lift is fully raised. It's pretty common to need this adjustment.

 

[Artisan]

If you guys are new or did not notice member "BXpanded" is no
other than "Harry", owner of BXpanded . He designs and
makes accessories for the BX25 almost exclusively and his wares
are second to none. Good Stuff indeed. CLICK HERE to go to his
website and rest assured anything you buy from him is top notch stuff.
I know...

(Harry I am not the OP but thanx for the easy to understand info)

 

[kb9okb]

Thanks Harry- very helpful info! I'll give it a shot and post back if it works.

 

[GolfAddict]

Well, it adjusts just like BXpanded (Harry) said, and something I should have done a long time ago. Thanks Harry!

And I'll second Artisan's testimonial. The BXpanded stuff is great. I have the bucket hooks (both kinds), forks, dolly for the loader, dolly for the backhoe, hydraulic pressure tester and adjustment kit, receiver hitch, sprayer (25 gallon version), and carryall. I can say that everything is top notch. It all pops on and off just like advertized and is great quality.

I'd love the Piranha tooth bar, but I'm still holding out hope he'll come up with a version that folds back into the bucket (hint, hint).

I didn't get his Under Armor since I very rarely have the mower deck off. I went with the BroTek that covers just the back half so that I can have that left on with the mower deck on. I did have to cut out a small square at the very back of the BroTek skid plate so that the BXpanded receiver hitch can slide on without interference from the plate. I also have the BroTek backhoe thumb and love that!

Both Harry of BXpanded and Richard of BroTek are great to work with if you have any questions or anything prior to ordering their stuff.

 

[RaydaKub]

Guys, Just to avoid confusion, the BX2230 and BX23 are different than the OP's BX25. The linkage is different and there is no feed back rod, etc.

OK, I'll keep my yap shut cuz I have no idea. :laughing:
On second thought, it sounds like the knob is similar even if the adjustment is not. :confused3: