new kubota 5100

[PHILLIP G]

My friend just bought a new 5100 hydrostatic and says that when using it in mid range pulling his boxblade that instead of spinning tires over it will stall completely out.....don't sound right to me. Wondering if anyone is familiar with this or if its normal. Tractor is 51 hp , should at least spin tires. Also after running for a while and idles down hears clicking sound in dash which resembles arcing. Had rear remotes installed, could it be they are plumbed wrong? Would appreciate any info.

 

[Code54]

I pull a 7' blade commonly and never had any problems stalling. Normally if I am doing heavy dirt work I run it in Low and have never stalled the machine. Is he running the RPMs ups? You do need some RPM's to get the turbo spinning and the HP up.
A lot depends on the type of dirt, the depth he is dropping it, rippers, type of tires, hills, etc?

 

[PHILLIP G]

He's running r4 tires and a smaller boxblade. He does light construction but with a smaller blade it should pull it fine. If he runs in low it won't stall but its too slow.

 

[C4Ranch]

Define stalls out. Are you saying it pulls the engine down until it kills the motor?

If the HST is going into relief he needs to let off the pedel. Less is more with hst. He should spin those R4s in mid range no problem. Make sure rpm is up. Or take back to dealer to check out.

 

[PHILLIP G]

He says it stalls engine out, I suspect pressure/relief problem. Dealer says fuel filter, only has 16 hrs. 2 hr drive to take to dealer they don't have field service. Dealer installed 2 hyd remotes, don't know but could be installed incorrect. Going to go run it myself this week to try and help him determine where problem is. Based on your info there is definitely a problem, I told him to take back to dealer but he is stubborn! I have a mx5000 with standard transmission and it will spin tires in high range with no problem. Bought in 2006 new and has been trouble free. Thanks for replying and if you think of anything please let me know.

 

[RollingsFarms]

You can get a hydro on an mx5100?? Wow didn't know that. That's an awfully big tractor for a hydro I'd think. I'd want a gear tractor like yours with that size of machine.

 

[C4Ranch]

I installed 3 factory remotes on mine. Pretty hard to mess it up.

Could be the fuel filter given it's new might have had junk in the tank. Or it could be a number of things.

 

[s219]

I have a mx5000 with standard transmission and it will spin tires in high range with no problem.

That doesn't really translate to HST; it would just whine and bog down under the same conditions.

Without knowing what he's doing with the box blade (soil, rippers, depth, etc) it's hard to say, but a deep-digging box blade can surely halt a tractor. A light tractor will spin the tires. A heavy one will bog the engine. If it works fine in low range, that suggests to me that he's simply doing something that medium isn't right for. I do most box blading in medium, but in some cases low is absolutely required.

 

[Kanook]

Sounds like he's using the go pedal as a gas pedal. Some new owners of HST tractors want to mash the pedal to the floor thinking they will get more power....they're just trading torque for speed..It took me a while when I got my 1st HST..

 

[Code54]

You can get a hydro on an mx5100?? Wow didn't know that. That's an awfully big tractor for a hydro I'd think. I'd want a gear tractor like yours with that size of machine.

Yep - normally works great. No issues with plowing or doing any ground work. Seems the key is being in the lower range. High is pretty much a road gear (without a lot of real hills), Med is good for loader work, brush hogging, etc. Low for heavy work and detail work. The hydro on this size is really handy especially for someone like me that does a ton of loader work and brush hogging.
I would throw a new fuel filter on (cheap and easy) and see if it helps. Otherwise I would bite the bullet and take it into the dealer for a full system check. As the others have said the Hydro does work different than a gear drive and "punching it" does not add power.
Good luck

 

[wmonroe]

Like others have said make sure he is using the hydro correctly. What ballast does he have? Depending on how the tractor is weighted I could see it stalling instead of spinning in medium.

 

[Steppenwolfe]

You can get a hydro on an mx5100?? Wow didn't know that. That's an awfully big tractor for a hydro I'd think. I'd want a gear tractor like yours with that size of machine.

I agree with your assesment completely. My mx 5100 is gear drive and it is a beast. Tons of power, and works like a rented mule. I test drove the hst and did not like it at all. Not saying there isn't a place for it, but not on a true work horse. My 2 cents...

 

[smitesmash]

Sounds like he's using the go pedal as a gas pedal. Some new owners of HST tractors want to mash the pedal to the floor thinking they will get more power....they're just trading torque for speed..It took me a while when I got my 1st HST..

it gets worse with the new Kubota auto-HST advance, where the RPM goes up with "throttle" position; and as such it appears to work for a while.
I find that I have to remind myself a lot that that is not how it is supposed to worlk

 

[motownbrowne]

I'd make absolutely sure he's using the hst properly as others have said. I don't know for sure, but I think mine would spin the tires in medium range at high throttle before hitting the relief and I have loaded r1s and 4 fewer hp. Make sure he's at WOT and when the rpms start to drop he eases up on the hst pedal.

Depending on the conditions I would think low range would usually be best for this type of work.

Regarding the hst on these tractors, it's awesome. I use my tractor for growing veggies and using the loader. Hst was the only way to go. Also, the biggest Kubota they make in hydro is the l6060 with 9 more HP than the MX 5100, and I think John Deere has one around 65 HP.

 

[nybirdman]

I have a L4240 HSTC and the only time I have had to put it in LOW range was with a full six ft.box blade.

 

[DieselnHooters]

Also, the biggest Kubota they make in hydro is the l6060 with 9 more HP than the MX 5100, and I think John Deere has one around 65 HP.

But are those physically bigger than the MX ?

 

[MHarryE]

The MX5100 is about 600 pounds lighter than my L5740 base tractor. Don't know if your friend has a loader but that adds a lot more, and my L5740 will spin the tires on gravel in mid-range no problem so something doesn't sound right - except the MX has a different hydro than the Grand L. I believe the MX has only a single displacement motor, and imp not sure what the pump and motor displacements are on a MX. I see the list price for a MX is less than half of what the list was on my Grand L so I assume you do lose some features and hydro capability may be one.

 

[dragoneggs]

Sounds like he's using the go pedal as a gas pedal. Some new owners of HST tractors want to mash the pedal to the floor thinking they will get more power....they're just trading torque for speed..It took me a while when I got my 1st HST..

Yeah funny thing... I find it is more of finding the right engine speed for the task than how much you press the pedal.