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I am hoping that you were not pinned or injured in the process. That said, the B7100 was/is rather a simple designed tractor. Two things come to mind - First, and the easiest to check, is to make sure that all of the linkage is still intact. Too often, the ring pin locks, or pull pins will rust and ultimately break off. Then when you least expect it, the linkage will fall off and become disengaged. This might have happened as this is an older tractor. It might just have fallen off the lever pins. Check this first.

Second, it is possible, albeit a breathing system, to develop an air block in the hydraulic circuit. This would most likely be evident in the filter for the drive. Take the cover off of the HST housing where the filter is located. Open up the fill cap on the tranny housing (just unscrews). Place matting or rags under the tractor, and remove the filter. Have a new filter ready to replace. I usually "charge" my filters before installing, to prevent an air block. To charge the filter, merely pour clean HST oil in the filter, and allow to stand for half hour or so, to allow it to soak in.
Then reinstall the new charged filter onto the tractor. Start it, run it and check your fluid levels. Make sure not to over fill if needed.
This should take care of any air blockage that could have developed.

Good Luck - Hope this helps,

Willie H.

Kubota B7100 HST Flipped Will Not Move
Kubota Tractors
Replies 2 Post by WillieH

vpaf2010 -

Not knowing the hours, or the actual condition of the tractor, it is somewhat tough to attach a price to it. That said, out my way here in the North East, that tractor in very good shape, both mechanically and physically will fetch between $4000 - $6000. Had it had a frontloader, the price would be an easy $7500 with the mower and blade. All depends on the market at time of selling...Spring time more folks are seeking tractors with mowers, and likely to realize a higher price based on seasonal demand, than in the Winter months.

Hope this helps

Willie H.

Kubota 7200 - market value
Kubota Tractors
Replies 8 Post by WillieH

If you have ANY desire to do any type of work beyond what you see today, which you will once you have your orange, get a "B" series...stay away from the BX models as bottom clearance in minimal, weight is minimal, framing is minimal, etc.

When you are plowing snow, you will be happy that you a) have the extra clearance, and b) have the extra weight that a "B" series offers. - Just more "tractor" and more versatile than a "BX" series.
Hope this helps.
Best -
Willie H.

Size Kubota for Homeowner Use
Kubota Tractors
Replies 7 Post by WillieH

Glad to assist, and, that the orange is cooperating once again!

Best -

Willie H.

Hydraulic oil in crankcase
Kubota Tractors
Replies 4 Post by WillieH

Have you tried a local hydraulics supplier? I use one pretty regularly, and they can realize the itty-bitty numbers on the seals right off the bat. It might take a day or two for them to get them, but they come thru every time - and a whole lot cheaper than buying seals from a dealer.
Hope this helps

Willie H.

Leinbach L7200 Post hole digger oil seals
Operating and Attachments
Replies 3 Post by WillieH

Nope 8-)

I believe (?) that the B1700 and B7300 are quite similar in that the layout is similar if not the same, only real difference being the tin work.

If you remove the left side rear tire and wheel assembly, you'll see two hard line hydraulic lines mounted to a block, via a couple of fittings, as well as a bracket on some realizing a strain reducer. The o-rings are nestled behind this block. Not a clean job, rather oily as you have to disassemble the lines and such, so have rags and/or drop bucket below to catch the fluid. Realize the o-rings, reinstall the block and brackets, then the lines. Top off fluid to account for the fluid that drained out, and you're off to the races. Before you reinstall the wheel, swab everything down REAL good to insure dryness . This way, in case there still is a leak somewhere, you'll be able to realize where it might be coming from. Not saying that this IS your issue, but sure would be an easy and inexpensive way out! Just some time...which we all have LOTS of. HA!

Best -
Willie H.

B1700 Hydostatic unit leaking
Kubota Tractors
Replies 7 Post by WillieH

Getmoreruss -

I am not totally familiar with the L4330, however, I might be able to shed some light as most operate under same principles.
Does your orange have a piggy-backed hydraulic pump? If it does, you may (?) have one of two scenarios. 1) a restriction in the circuit that operates the 3pt lift. By removing the relief valve, you might have interrupted the restrictive pressure in that line. Once reassembled you have no restriction until that circuit builds sufficient pressure again to force the restrictive element into play again and block you off. b) if your pump seal or 3pt seals have for what ever reason decided to blow, you could have a lack of control by a cavitation of the pump/circuit (air being drawn into the circuit and having the pump spin without sufficient hydraulic oil and air does not build pressure as hydraulic fluid does). Consequently, what you get is a non lifting or non operational implement.However, by removing and disassembling the relief, you might have released enough air in the system to allow more hydraulic fluid back in, thereby offering a little, or short term operation.
Questions:
When you look at the hydraulic oil, is it clear oil, or does it look milky? The milkyness, would indicate that you have air within the system and you would have to realize where the introduction is coming from and change the fluid to minimize the air that is now mixed into the fluid.

When you disassembled the relief valve, did you notice any contaminants in the fixture, such as the above milkyness, or any pieces of o-ring (black or brown in color)? This would indicate that somewhere you have experienced a seal breach, and would need to locate it and correct it.

Just some ideas being thrown out here...

Best -
Willie H.

Kubota L4330 three point hitch won t rise
Kubota Tractors
Replies 12 Post by WillieH

The funny thing is, is if one could realize the number of folks that read this thread and said to themselves, "well shoot, did I miss something somewhere?" and research their emails/postings, vs. the (sadly majority that will not even blink about it.

Dennis, are you trying to tell me something (?) ha ha ha, I received four alerts to the post from KT. LOL :-)

Best,
Willie H.

Something I really like and something I don t
Website Operations Howto
Replies 5 Post by WillieH

Globally speaking, I am close to you... Over on the RI border. Not a dealer though, just have and love my orange's and their attachments. I think (?) I may have a trenching bucket for that hoe though. I usually use a 16" bucket on my 6500's for just about everything.
I am away out of state presently, so I cannot give an absolute just yet until I return. I'll be running thru Windsor Locks on the way back..........

Best - Willie H.

Kubota B7200 Hydraulic leak
Kubota Tractors
Replies 7 Post by WillieH

Wow Dennis, you're either REAL lucky or I just have all the bad luck ! :-)
I have two separate systems at my house, both put in around the 1950-1960 era by my father at the time. The greatest pipe at the time was the creosote orangeberg. The dingaling that back filled form him, never bothered to remove the boulder from the fill, so in time, the orangeberg was not only moved with ground movement, but crushed by the weight of the boulders.
Then one day, everything came to a screeching halt when the giant willow tree at the end of the leaching field uprooted. The root diameter was about twenty feet, and sucking every bit, though some 150 feet downstream from the tank. We did you rid-x for many years, with great digestion. Then one day, there was no more "movement" if you will. What I found afet digging up the system, was as mentioned the pipe issues, and other factors such as the various nettings of fine roots from other trees that found the moisture thru broken lines. In any event, the tank was friggin solid, pressurized to the bottom of the lid. When the pumper showed up, and I lifted the lid, I literally needed my backhoe to chain lift, as the suctioned was incredible to the solids. He took his spoon and worked that sludge for almost two hours, until he felt comfortable that he could get a good mix of water back into the tank. He then suggested the looksee downstream. I dug it up and replaced everything, but the tank, and filtered the backfill accordingly. His recommendation, was even if a good system, it needs to be religiously pumped every three to five years, depending on use of course. By no means am I saying his word is gospel, after all he is in the business and needs repeat business for survival, but a variety of factors do enter the picture that would ultimately dictate frequency of pumping out. Every system is different, every household is different, every yard is different - and local codes are different as well.
That was about eight years ago now, and had it pumped once since - all looked GOOD!
Not sure if I would try lime though without a lot of research in my neck of the woods - boney, dirt over bedrock 4'-5' down.
"If it were not for bad luck, I would have no luck at all!" The story of my life. HA!

Best,
Willie H.

Septic tank care
Home Improvement
Replies 5 Post by WillieH

Joel,
As a FPS, (Fluid Power Specialist), I Thank you for passing this along for everyone. Over the years of selling hydraulic systems, servicing them and integrating them on a daily basis, I cannot tell you how many dangerous concoctions of hydraulic circuits I have witnessed.

Folks, PLEASE take a moment to educate yourselves a little if you are not hydraulically savvy already - it could save your life to understand how hydraulics work.

Best -
Willie H

Hydraulics Take the quiz
Tractor Projects
Replies 9 Post by WillieH

Most who are seeking, are seeking a 4wd unit as opposed to a 2wd. Thanks for the clarification.

Although a loader can be fit to each of these tractors, for instance an LS model from WOODS, they are pricey. Add that to a 2wd unit that is not in high demand (???).....I think you answered your own question.

Willie H.

Kubota L2250 help
Kubota Tractors
Replies 14 Post by WillieH

Mike ~
That "looping" coil, is for the cooler. If you take a look at yours, being a DT model or gear shift, you probably won't see it. Take a look on the HSD/HST models, or Hydrostatic units, and you will see them. Keep in mind that hydraulic fluid under working pressure produces significant heat....needless to say, it needs to be cooled or it will burn and be useless, as it will thin out to nothing leaving you stranded. Some units realize an actual cooler, such as one may ad to an RV or tow vehicle to keep the tranny fluid cooler for proper operation. This would be evident by looking at the radiator, and seeing what looks like a second one...just a cooler.
Best ~
Willie H.

Mystery coils
Kubota Tractors
Replies 2 Post by WillieH

Grinder11 -
The switch is designed NOT to have a detent, and BE spring thrown (or momentary contact as it's called) on glow plug position. Just look at the dash lights when you start the process. The glow position is only hot when starting - purposely - just to get the fuel to ignite, then the process of engine running takes over (in simple terms). Once the key gets released, it comes home to the run position. Many of tractors were lost to fire when the glow stuck on.
Best ~
Willie H.

B7500DT Ignition switch
Kubota Tractors
Replies 2 Post by WillieH

I do know that dependent upon the manufacturer, oil filters will vary with internal components, and quality. I reread your initial post, I was of the impression that this whine noise was more or less, an intermittent occurrence rather than more constant after a few minutes. I believe that an oil filter change is a heck of a lot cheaper to invest in than anything major - for sure. Perhaps, the noise is not present as the engine is at rest and until the engine develops significant pressure to put the by-pass valve into operation, no noise would be present. Does the noise occur as engine speeds increase or as the pressure increases in short time after starting? Then, does it stay noticeable after it starts, or on and off, and if on and off, does there seem to be a correlation between engine speeds to the noise coming and going? Curious

~ Willie H.

Mystery Noise
Kubota Tractors
Replies 11 Post by WillieH

Ah that brings back memories to me as well. Was putting in telephone pole cut-offs for fence posts. Drilling my holes into a bank of sorts at the edge of the road. .. . otherwise flat lawn. The auger caught hold down under, and down she went! As you pointed out kt, faster than the clutch could be thought of. Tried with a bar to reverse the auger...no luck. Disconnected the digger from the tractor and there she sat. LOL
A neighbor stopped by with his orange, and we tried to lift the bugger out...no luck. We then REALLY showed the town folk how it was done, as the two of us muscled the darn thing around in circles to reverse the direction. Eventually we got her out and reattached, but not without A LOT of sweat, certain embarassment, and A LOT of laughs! Now if I want a hole for a post, I'll dig with my backhoe and backfill! LOL
Best
Willie H

B2620 implement arms won t move
Kubota Tractors
Replies 23 Post by WillieH

WillieH has posted a new photo.

Subject: Kubota Generic Hydraulic Lift Drawing.

Description: <br>Hydraulic Lift Arm

Kubota Generic Hydraulic Lift Drawing - New Pix by WillieH
Photos
Replies 1 Post by WillieH

Making an assumption here (dangerous), but you are referring to your two spool loader valve, right? And, are we sure the control valve is kaput (?) - as they are typically pricey to change on a whim.

The original valve will probably never be found again as the B6000 is rather old at this point. That said, a conventional two spool valve for a loader control would be readily available and adaptable from several different supply stores. One, your Kubota dealer, though will be potentially rather pricey. Two, TSC, Tractor Supply Company offers several different after market multi spool valves, Three, check ebay or the like for various listings. They are readily available with minor adaptations of fittings and footprints.
Hope this helps.

Willie H

Kubota B6000 locate Spool Valve
Kubota Tractors
Replies 6 Post by WillieH

Welcome back Frank.....I was away as well for quite a spell a while back, so again, welcome home!

Best ~
Willie H.

I m back
Just For Fun Off Topic
Replies 10 Post by WillieH

Man..........
Either I have been out of the loop for TOO long, or I have been darn lucky with all the diesels that I have had, and still have. Never heard of this issue
I have never had any of my diesels go into a "runaway" mode.
Does this pertain to LARGE equipment deisels like D8's D9's etc?
Willie H.

Emergency Shut Down Valves
Parts and Repair
Replies 27 Post by WillieH