Anyone else make the same mistake I did?

[nyone]

I would say that if your original sheer pin broke after 1.5yrs of use and then you broke 3 in a short period of time with the replacement gr2 I would stick a gr5 in it.

Are you sure there suposto be a gr2? Gr2 is piss poor chinese quality bolts. You can hardly get them tight with out stretching it.

 

[CausticUrbanCoast]

Who offers hydraulically driven PTO? Other than Power Trac, skidsteers and a couple others, but those are different types of machines in the first place.

Shear bolt works just fine and I do believe it's a better option for inexperienced users that don't know or neglect to maintain slip clutches.

We have this style that's very easy to change the shear bolt. Just a simple M8 grade 5.8 bolt. When it shears, it's as simple as pulling both halfs out, take the nut of the broke piece and slap a new one in.

View attachment 705988

PTO typeLive independent, hydraulic PTO with PTO brake, wet clutch

Kubota does and the OP's MX5400 tractor has oneView attachment NEW_MX_KCL.pdf

 

[ruffdog]

PTO typeLive independent, hydraulic PTO with PTO brake, wet clutch

Kubota does and the OP's MX5400 tractor has oneView attachment 706009

"hydraulic PTO" could mean 2 things.....A PTO that is engaged by a hydraulic clutch OR a hydraulic driven PTO. My Toolcat has the latter...a hydraulic motor driving the PTO. I would assume the OP's MX5400 has a hydraulic CLUTCH on his PTO.

 

[CausticUrbanCoast]

"hydraulic PTO" could mean 2 things.....A PTO that is engaged by a hydraulic clutch OR a hydraulic driven PTO. My Toolcat has the latter...a hydraulic motor driving the PTO. I would assume the OP's MX5400 has a hydraulic CLUTCH on his PTO.

I copy and paste the line from the pdf, it is pretty clear: hydraulic pto, wet clutch

 

[ptsg]

PTO typeLive independent, hydraulic PTO with PTO brake, wet clutch

Kubota does and the OP's MX5400 tractor has oneView attachment 706009

Well, you mentioned "hydraulically driven PTO" on your previous post. It a totally different thing than a wet clutch setup.

Yes, most tractors will have wet clutch for the PTO these days. The wet clutch uses hydraulic pressure to engage the clutch but the PTO is still all mechanically driven from the flywheel to the shaft at the back.

Hydraulically driven PTO is an hydraulic motor with a 6 splined shaft used to power PTO attachments. Pretty much same concept as an hydrostatic transmission, as in it's basically driven by fluid and therefore fall on efficiency versus the mechanical drive.

 

[ruffdog]

I copy and paste the line from the pdf, it is pretty clear: hydraulic pto, wet clutch

View attachment 706031

Oh yes.....that says it all and is crystal clear. Just like all sales brochures.

 

[TheMan419]

All about the money, slip clutch is expensive and takes extra man hours to assemble. Worth it, but the average buyer looking at two side by side wont understand why one's $100 cheaper.

I preferr the shear bolt over the slip clutch. One less thing I have to maintain. I just cut my 18 acres or so of horse pasture. So light grass and I know there are no stumps or large rocks about. If I were mowing commercially likely a different story.

 

[CausticUrbanCoast]

That's fine, there are no new advances in ptos and pto clutch types.

 

[coobie]

I don't know why you think that either? Right from Land Prides Website "The RCF2060 & RCF2072 features a smooth top for easier cleaning and a floating top link for following ground undulations in grass, weeds, and light brush up to 2" in diameter. The RCF20 is ideal for rural acreage or farm grass maintenance. These cutters have a Category 1 3-Point hitch that are Quick Hitch adaptable. The standard ASAE Category 3 driveline is offered with either shear bolt or slip-clutch protection and the tailwheel is offered laminated or solid rubber."

Welcome to your first 5030 introduction he loves to bash others and they're equipment.He has the best equipment just ask him.

 

[ruffdog]

Well, you mentioned "hydraulically driven PTO" on your previous post. It a totally different thing than a wet clutch setup.

Yes, most tractors will have wet clutch for the PTO these days. The wet clutch uses hydraulic pressure to engage the clutch but the PTO is still all mechanically driven from the flywheel to the shaft at the back.

Hydraulically driven PTO is an hydraulic motor with a 6 splined shaft used to power PTO attachments. Pretty much same concept as an hydrostatic transmission, as in it's basically driven by fluid and therefore fall on efficiency versus the mechanical drive.

That is why Kubota's description of the MX5400 PTO doesn't make sense. You don't need a clutch if the PTO is hydraulically driven as all you do is turn on the hydraulic flow.

 

[CausticUrbanCoast]

Who needs a clutch, gears or hydraulics? Its 1903 and the pto stops when I get tired, maybe the shearpins will break before my arm does?

If I can get the rpm up at 540, everything should run fine! Need to invest in one of those new fangled overrunning gizmos cept I heared they are powered by black majik an the devil!


Shearpins/bolts tend to break frequently when the rpm is too low and inertia is unable to overcome the force. However brush mowers have pivoting blades that are supposed to move when it hits something hard so they can maintain the inertia.

If running at the rated rpm and still breaking pins it is likely something is getting hooked that is strong enough to stop the blades (couple of strands of tensile fensing will do it) or the mower is not immediately being disengaged when something hard is hit (can not hear it or do not notice it).

 

[bigtiller]

Tractors MX-5400, Brush Hog (aka Rotary Cutter) Is a Land Pride 6 Footer. I broke my first shear pin after having the brush hog a year and a half (but with only about 35 hours on the brush hog) Pretty good run and it's kind of expected to break one every now and then. I looked in my garage and couldn't find any 1/2" x 3" Grade 2 bolts so went to the hardware store, no luck there, only grade 5 and grade 8, so then went to dealer and they were out. So then went to Tractor supply and bought a 5 pack of country line shear bolts and broke 3 while mowing a half hour lol.

My luck went the other way;
I've had my third tiller now for 8 years. It has a shear bolt, the first 2 tillers I owned had slip clutches.
When I bought it, I figured it would bust a shear pin quite often, especially if I didn't have a handy replacement.
So I bought several dozen of them and devised a way to have them and the tools to replace it with me at all times.

I broke the first one last week doing a pro-bono job after a large hedge row was torn out. Go figure....LOL

 

[Cycledude]

5 foot Woods Dixie Cutter here, it came equipped with slip clutch.
With a 45 hp tractor it will easily choke the tractor without slipping.
With a 70 horse tractor the clutch will slip without phasing the tractor.
Bought the Woods cutter brandnew 40+ Years ago and have never had any trouble with it, so far I’m glad it has slip clutch instead of shear pins. Currently run it with a 55 horse LS XR4155

 

[zzvyb6]

I only use shredders for cheese and office paperwork. Mowers for everything else. Maybe the O.P. should slow down and raise the pto rpm, eh ?

 

[Bullwinkle123]

Some fields are harder than others too. I had watched plenty of people I hired cut my field over the years. The last guy kept a box of new pins handy. It's why I paid the extra $600-800 for the slip clutch on my land pride, and well worth it in my book. I hate shear pins, they can really let you down when you need to get something done and are out of replacements.

 

[Bobcat Tractor Mac]

The Shear Bolt is to protect the drive line and gear box from over load. If you install a grade 5 or grade 8 bolt the dealership's parts department will love you. Instead of breaking the shear bolt you will break the drive line or the gear box when you hit that big rock or stump. Your call, but a 25 cent bolt is not very expensive.

If you decide to get a slip clutch, you will need to maintain it at least once a year by loosening the springs on the clutch, block the rotary cutter or rotary tiller so the clutch will slip and get all the dirt and rust out of it. Then retighten the slip clutch bolts to the factory setting. If you don't do this the slip clutch might not slip and you will be in buying a drive shaft.

 

[Beeenvenue]

The Shear Bolt is to protect the drive line and gear box from over load. If you install a grade 5 or grade 8 bolt the dealership's parts department will love you. Instead of breaking the shear bolt you will break the drive line or the gear box when you hit that big rock or stump. Your call, but a 25 cent bolt is not very expensive.

If you decide to get a slip clutch, you will need to maintain it at least once a year by loosening the springs on the clutch, block the rotary cutter or rotary tiller so the clutch will slip and get all the dirt and rust out of it. Then retighten the slip clutch bolts to the factory setting. If you don't do this the slip clutch might not slip and you will be in buying a drive shaft.

I don’t find it nearly that difficult. I just loosen the bolts and engage/disengage a couple of times at full 540 rpm. Then retighten just snug. My 5’ shredder doesn’t make it slip at “snug” and I dispense with measurements, torque, etc and all the time to set it “properly”.

I do mow mostly grass/weeds with a few assorted sticks and limbs that get in the way, and sometimes the ground where I have a perfectly positioned rise. I rarely see my clutch slip except with the bolts fully loose (I use a paint pen to check).

 

[Cougsfan]

I think there is a place for either shear bolts or slip clutches on brush mowers. For light cutting, shear bolts are fine, less expensive, and relatively maintenance free. For heavy duty cutting, slip clutches are definitely better.

 

[solidrockfarm]

Tractors MX-5400, Brush Hog (aka Rotary Cutter) Is a Land Pride 6 Footer. I broke my first shear pin after having the brush hog a year and a half (but with only about 35 hours on the brush hog) Pretty good run and it's kind of expected to break one every now and then. I looked in my garage and couldn't find any 1/2" x 3" Grade 2 bolts so went to the hardware store, no luck there, only grade 5 and grade 8, so then went to dealer and they were out. So then went to Tractor supply and bought a 5 pack of country line shear bolts and broke 3 while mowing a half hour lol.

Did I notice that the Tractor supply shear pins had holes thru them just above the treads. That would weaken them severely

 

[Gord Baker]

Many Shear Pins are broken due to operator error. First mistake is using Bush Hog in Reverse,
Second is cutting too low. Broken pins damaged housings, destroyed rear wheel mounts.
Keep your hand on the raise lever, and move Forward wherever possible. The front of the unit will warn you of obstructions most times.