50 hr service results in different machine B2601

[zargnut]

Hi,

I am a newbie using a b2601 for some residential type backhoe, grading, and yard work. I received the tractor last January and have 44 hours on it. I decided to go ahead and perform the 50 hour service. On one thread I read someone discussed changing out the hydraulic fluid because the dealer stuff can be junk and they noticed improvement with the UDT2.

The dirtiest work I did was moving about 60 tons of red gravel, which dumped some dust on the tractor.

On my service I found:
1. The screen for the radiator was totally clean
2. There was some red dust in the engine compartment, but not a crazy amount
3. The outer air filter was dirty on outside, but inside was clean and yellow.
4. The inner air filter was pristine and I left it there.
5. Engine oil was dirty and dark. I replaced with Mobil one 10W30
6. The hydraulic fluid was clean, straw colored, but I replaced anyway with about 3.5 gal of UDT2. There was a bunch left in lines and cylinders.
7. I replaced the filters for hst and hydraulic.

After starting it up and letting it run for 5 minutes, I took it for a spin.

It Has appreciably faster ground speed
It does not whine when going up hills. Even empty if was always whining going up a mildly steep hill, especially in High. No longer. Hydraulics seem more responsive and powerful.

I was attributing to likely combination of clean air filter, new hydraulic filters. Maybe the UDT2 given the lack of hydraulic whining.

Any educated thoughts about what made the difference?
Could cheap hydraulic fluid make that much of a difference?

Thanks
Dan

 

[dirtydeed]

Did you use UDT or SUDT?

 

[zargnut]

Super UDT2

 

[85Hokie]

Super UDT2

funny how that synthetic stuff really works!!!

that engine oil you used..... Mobil 1 .....was it for diesel? And do not let "dirty" oil bother you - not the color, rather the hours on the oil are the critical number. Diesels will make a clean pretty oil dirty in a hurry.

And the factory oil that came with machine really isn't junk - but it might not be the best.

 

[zargnut]

uh oh....

No Mobile 1 was generic AutoZone 10W30.

Kubota Manual Page 47... just says: SAE 10W30 or 15W40

Shall I assume I am changing the oil again, with a different oil?

 

[zargnut]

I just ordered

Shell ROTELLA T5 10W-30 Synthetic Blend, Heavy Duty Engine Diesel Oil, 1 Gallon

and a couple of filters... Is it good enough to just drain and replace the filter, or should I change the oil/filter, run a few minutes, then change it again to flush out the Mobil 1 oil?

First diesel... didn't realize there were different oils.. .I though SAE was a STANDARD!

dan

 

[85Hokie]

I just ordered

Shell ROTELLA T5 10W-30 Synthetic Blend, Heavy Duty Engine Diesel Oil, 1 Gallon

and a couple of filters... Is it good enough to just drain and replace the filter, or should I change the oil/filter, run a few minutes, then change it again to flush out the Mobil 1 oil?

First diesel... didn't realize there were different oils.. .I though SAE was a STANDARD!

dan

Dan,

diesels pump out little bad things (acids) that really breakdown "typical" oils......so they make diesel oils that .... try to stop the breakdown from those acids. Whereas gasoline oils dont do this in the same way. Diesels also produce harmful byproducts that will reduce the oils capacity to lubricate over time.

here is a good read on the subject:

https://www.machinerylubrication.com/Read/28576/comparing-gasoline-diesel-engine-oils-

as for changing the oil right now.....well, there is no damage done - but I would change it sooner down the road. Like in another 50 or so hours.

SAE is the society of automotive engineers......they place their seal on 1000's of oils and types. 99% of ALL oils meet their standards. BUT different oils are made and constructed for different climates and engines.

Engine oil is a very fine science - lots of info out there on the products being made now.

 

[zargnut]

Thank you very much for the reference. I will be reading up on it this evening.

In my ignorance, I assumed that SAE was a standards based organization, like seeing

ISO standards
IEEE standards for networking.

It was a mistake to just assume. Thank you very much for the reassurance that there was no damage done.. I was a bit panicked that it could have gummed something up in the short time I had run it... I will just swap it out on Wed when the new filters and oil arrive. Will save me a repeat trip to the dump to recycle the oil.

Thanks again
dan

 

[EverUpward]

uh oh....

No Mobile 1 was generic AutoZone 10W30.

Kubota Manual Page 47... just says: SAE 10W30 or 15W40

Shall I assume I am changing the oil again, with a different oil?

Messicks has a good video on youtube about oils and fluids . Basically motor oil is given a grade by the government or industry. But hydraulic fluid isnt and quality can vary wildly. Id go with the kubota brand hydraulic fluids at a minimum. Messicks has another video where the cut oil and hydraulic filters in half and look at the insides. Again, the kubota brand filters were the best.

 

[zargnut]

Messicks has a good video on youtube about oils and fluids . Basically motor oul is gicen a grade by the government or industry. But hydraulic fluid isnt and wuality can vary wildly. Id go with the kubota brand hydraulic fluids at a minimum. Messicks has another video where the cut oil and hydraulic filters in half and look at the insides. Again, the kubota brand filters were the best.

Kinda funny... because i bought the tractor from Messicks... and it came with lots of hydraulic whining... lots of possible parameters at play, but there is certainly improvement after replacing oils and filters. I wonder what they use for hydraulic fluid on their assemblies.

 

[SDT]

uh oh....

No Mobile 1 was generic AutoZone 10W30.

Kubota Manual Page 47... just says: SAE 10W30 or 15W40

Shall I assume I am changing the oil again, with a different oil?

Yes.

You must use diesel spec oil in diesel engines.

Long term use of engine not intended for diesel engines accelerates wear and can lead to pump failure.

SDT

 

[SDT]

I just ordered

Shell ROTELLA T5 10W-30 Synthetic Blend, Heavy Duty Engine Diesel Oil, 1 Gallon

and a couple of filters... Is it good enough to just drain and replace the filter, or should I change the oil/filter, run a few minutes, then change it again to flush out the Mobil 1 oil?

First diesel... didn't realize there were different oils.. .I though SAE was a STANDARD!

dan

Though not urgent, I would drain the oil and remove and drain the filter.

I would then reuse the nearly new filter and refill with proper diesel spec oil. You haven't damaged anything.

BTY, the oil in your HST from the factory is not junk but SUDT2 is better.

SDT

 

[zargnut]

Though not urgent, I would drain the oil and remove and drain the filter.

I would then reuse the nearly new filter and refill with proper diesel spec oil. You haven't damaged anything.

BTY, the oil in your HST from the factory is not junk but SUDT2 is better.

SDT

Ok, will do.. thanks

 

[sheepfarmer]

I have been told that the new Kubotas now come from the factory with SUDT2 in them.

When I got my first Kubota in 2013 I asked them to include a quart of whatever was in it when they delivered the tractor so I could top off. It was UDT. First service a year later I asked for SUDT2 in the change, and took back my unused spare UDT to exchange for SUDT2. Was told they could be mixed, but they traded anyway. Second tractor 2016, same request, different dealer, and it was SUDT2 . FWIW I seem to wear a sign that says tell the little old lady anything ....she'll never know. But sometimes i do.

 

[NoJacketRequired]

FWIW I seem to wear a sign that says tell the little old lady anything ....she'll never know. But sometimes i do.

Excuse me for sayin'... This line frustrates the daylights out of me. Here we are in 2018 and we see automotive garages and farm equipment dealerships still pulling this "oh it's a woman, she won't understand" nonsense. Grrrrrrr! Makes me a very angry fellow.

Just for the record, if I wanted a hand with anything mechanical around the house, I called for my daughter's help as she was far better at mechanical stuff than her two brothers. Yeah, don't try to sell her the wrong oil, or you'll hear about it, directly from her, in terms that will leave no room for interpretation! LoL

 

[zargnut]

I totally agree that gender does not define knowledge or intelligence . I have been trying to teach both my kids (boy and girl) carpentry, welding, plumbing, electrical and other skills and they are equally useless, preferring to play on stupid electronic devices.

Knowledge does not equate to intelligence. My wife is a doctor and very intelligent, but she is not exactly technically knowledgeable. When we got the tractor, she waltzed out and asked, “Can I drive the Hibachi?”

I am trying to ensure my daughter is better equipped to fend off the prototypical mechanic.

 

[D2Cat]

Zargnut, did you tell her sure she could, kind of slow and hard to start?

 

[zargnut]

Yeah no doubt. Handed her a bag of charcoal and a lighter ;-)

 

[thedevilyoulove]

Hmmm, my tractor runs and operates fine but I assumed that the dealer/factory would use Super UDT2 in the HST. Is that not the case? If not I guess I'll change it out with the correct fluid.

 

[85Hokie]

Hmmm, my tractor runs and operates fine but I assumed that the dealer/factory would use Super UDT2 in the HST. Is that not the case? If not I guess I'll change it out with the correct fluid.

Any Kubota fluid IS the correct fluid......the choice is what you wish to place in it from a performance point of view or cost point of view.

UDT was the standard for 40+ years......then a hybrid came out - SUDT then its cousin came out S-UDT2 which is what "some" dealers place in the machines when they get them, then again some dealers DONT even carry the S-UDT2 in stock.......but simply use what is in the "barrel" out back