Anyone have a MechMaxx 3-pt stump grinder?

[RjCorazza]

You may want to tweak the slip clutch. I stalled out my tractor a few times (which I really hate doing) before I dialed in the slip clutch, and got better with the grinder.

 

[LittleBill21]

You may want to tweak the slip clutch. I stalled out my tractor a few times (which I really hate doing) before I dialed in the slip clutch, and got better with the grinder.

yea i set it to the specs listed in the manual, but they are kind of a joke. its .02mm difference between the pto's listings. that's almost nothing, breath on it wrong and its different. I did slip it for break in, but yes need to back it off a touch.

 

[dieselscout80]

This is prolly be the last update for me on this.

I am happy. the machine seems well made. I was concerned with my 20 pto hp, but i can be pretty aggressive, for a home owner machine its more then acceptable. I thought I would need to baby it, but not really. I stalled it once to see how much it takes and its needs like a 4 inch + cut to get there. I did buy a camera, but it was not setup up great out of the gate and had to hold it. If i had to do 40 stumps I would need the camera, but I did 4

the 4 foot stump was massive, and took prolly an hour, but I wasn't really rushing. 1 foot tree's are less then 10 minutes. that said none of my tree's were alive for years, so the wood was softer. Teeth look fine, hit a bunch of rock as well.

Tried to use the chainsaw holder. not sure I figured that out yet, I have a low end consumer chainsaw and the blade is small, max tightness it still slid. I need to investigate another day.

any questions let me know. But I did 80% of my tree's today already with it.

Disclaimer I have never used a stump grinder, but I got one for less than a song.

Do you remove the second pin that allows the head to pivot backwards when cutting if too big of a bite is taken?

My very similar stump grinder’s front bearing housing is cracked.

My guess is it was used too hard with the pin in and it didn’t allow the head to pivot back.

 

[LittleBill21]

Disclaimer I have never used a stump grinder, but I got one for less than a song.

Do you remove the second pin that allows the head to pivot backwards when cutting if too big of a bite is taken?

My very similar stump grinder’s front bearing housing is cracked.

My guess is it was used too hard with the pin in and it didn’t allow the head to pivot back.

I did have it removed, but I didn't really see it pivot much. If the slip clutch is adjusted properly, it should slip first before it pivots. the unit is over 500 pounds. takes a bit to move it.

 

[dieselscout80]

I did have it removed, but I didn't really see it pivot much. If the slip clutch is adjusted properly, it should slip first before it pivots. the unit is over 500 pounds. takes a bit to move it.

Thanks

The slip clutch on mine looks rusted, so likely won’t slip period.

 

[LittleBill21]

Thanks

The slip clutch on mine looks rusted, so likely won’t slip period.

you are to back the nuts off till the springs are loose. then engage the pto, it should slip, if it doesn't keep them loose, and go cut a tree till it breaks free. if it still doesn't break free you may need to remove the bolts and force them apart.

 

[StuartDK45SE]

I ordered mine Oct 21st and it came in yesterday, Nov 13th. Not bad.

 

[StuartDK45SE]

Well, I can’t get the PTO shaft onto the grinder. I’ve taken a file and cleaned up the splines on the PTO shaft (basically took the paint off). I can’t see any defects , burrs etc. I finally got the shaft to go on about 1/2” , tapped it with a piece of wood and sledge. Nothing. It simply will not slide onto the male shaft of the grinder. I’ll call customer service tomorrow.

 

[LittleBill21]

Well, I can’t get the PTO shaft onto the grinder. I’ve taken a file and cleaned up the splines on the PTO shaft (basically took the paint off). I can’t see any defects , burrs etc. I finally got the shaft to go on about 1/2” , tapped it with a piece of would and sledge. Nothing. It simply will not slide onto the male shaft of the grinder. I’ll call customer service tomorrow.

do you have an air hammer? take an air hammer and open the wedge points, once wedged if you have it, an air hammer with a hammer end and a piece of wood walked it on for me. the alignment was pretty critcal, had to spin it while hammering

 

[StuartDK45SE]

do you have an air hammer? take an air hammer and open the wedge points, once wedged if you have it, an air hammer with a hammer end and a piece of wood walked it on for me. the alignment was pretty critcal, had to spin it while ham

I do not, but I could buy a cheap one. What exactly are you referring to with the wedge points? I've watched every assembly video out there an people are able to just slip the shaft on. Thanks for the input.

 

[LittleBill21]

I do not, but I could buy a cheap one. What exactly are you referring to with the wedge points? I've watched every assembly video out there an people are able to just slip the shaft on. Thanks for the input.

there are 2 bolts, that clinch it to the shaft. there is a gap there small. take a chisel and hammer it in, your trying to pry it open, make sure the bolts are removed.

mine did not slide on, prolly took me about 10 minutes to get it on with the air tools.

unfortunately cheap air hammers don't work great. 2 people and sledge will prolly be the best bet, make sure to grease everything, once you get past a point it will slide on it

 

[Code54]

I have been looking at the MechMaxx stump grinders and was wondering if anyone had any additional reviews they would like to share?

 

[Powil]

New to the site... been reading/lurking on the site for some time now. Lots of great information. Recently I've started looking at the WG24 Stump grinder by MechMaxx. I've learned alot on the site... but was curious about one specific question which I was hoping I could get help with. My DK50SE is a 50hp.... the WG24 states it's rated for 15-45hp? Does anyone believe the extra 5hp would cause an issue? I know WM sells the larger 28 model but it also comes with a higher price. Thoughts?

LittleBill21 BTW-thanks for your review of the item...​

 

[RjCorazza]

With the slip clutch properly adjusted I don't think the extra 5 HP will be a problem. I would adjust the clutch to slip well before the tractor stalls.

 

[Code54]

The DK50SE is 49hp at the engine and the PTO is far less so you are good to go. The MechMaxx is rated for 45hp at the PTO so are well within that.

Kioti DK50SE Power
Engine (gross)	49 hp 36.5 kW
PTO (claimed)	37.5 hp (cab) 28.0 kW
	35.5 hp (ROPS) 26.5 kW

 

[Dtown]

Well, I can’t get the PTO shaft onto the grinder. I’ve taken a file and cleaned up the splines on the PTO shaft (basically took the paint off). I can’t see any defects , burrs etc. I finally got the shaft to go on about 1/2” , tapped it with a piece of wood and sledge. Nothing. It simply will not slide onto the male shaft of the grinder. I’ll call customer service tomorrow.

Did you ever get the PTO shaft onto the grinder? If so, what did you end up doing? I'm having the same problem.

 

[Code54]

I just got a thick blade (old) screw driver and drove it in spreading the gap slightly wider. Then just tapped it on with a dead blow hammer

 

[Dtown]

I just got a thick blade (old) screw driver and drove it in spreading the gap slightly wider. Then just tapped it on with a dead blow hammer

Thanks. We ended up doing basically the same. Took bolts whole way out to get started. Hammered a regular chisel into each side as far as they would go without going into the hole where the shaft goes. Lined it up and wiggled and it started sliding. Then put bolts back in loose and hammered it down with dead blow. Slid right on.

 

[Code54]

I will give them credit, there is NO slop in the fitting. Lol

 

[socyxod]

Hey y'all,

Anyone purchased one of these basic stump grinders from MechMaxx?

3-Point PTO Stump Grinder with 34 Carbide Teeth (PTO Shaft Included with Slip Clutch), for 15-45HP Tractor, SG24

MechMaxx 3-Point PTO Stump Grinder Model SG24 is a great tool for landscaping, its suit for 15-45hp Tractor. This machine equipped with a slip-clutch PTO, ensuring you peace of mind as you tackle stump removal tasks with precision and safety. Included with the SG24 Stump Grinder is a slip clutch...

mechmaxx.com

They look a LOT like the woodland mills WG24 (even use the same number, 24 in the product name) but are a whopping $700 cheaper when you factor in delivery. This is kind of the price difference I need mentally to help justifying a purchase. I onyl have a handful of stumps to get rid of (for now) but would be nice to help the neighbors here or there also.

There are a ton of positive reviews on the mechmaxx site, but they could easily be curating out anything negative, hard to judge. Hence I am asking everyone here.

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On a side note, I totally get the struggle of managing time between researching stuff like this and keeping up with work. That’s why I found best nursing paper writing service super helpful when I had deadlines piling up. Just something to consider if you’re juggling too much at once! Anyway, would love to hear if anyone’s actually used the MechMaxx grinder—does it hold up?

Stump grinders can be a real game-changer if you’ve got land to clear, but picking the right one is tricky—especially when some models look nearly identical but come with a big price difference.