B2150HSD 950 hrs no hydraulic function

[marktomes]

I just recently purchased a 1992 B2150HSD with 950 hours on the working meter. She ain't pretty but she runs great, is what i would like to say about her! But I got no hydraulic function at all! No FEL, No 3pt, and no go in forward or reverse. The problem first reared its head last weekend, I started it up, moved it out of the barn, stopped for a second to reflect on the beauty of small farm livin, then no hydraulic function. Left it running while i read my manual, googled and such, then when i came back outside she worked just fine. My first though was the cold weather, it was around 30f when i started her, she warmed up and all was good. I used it for a couple hours to haul fire wood and grab logs with no problems what so ever. This weekend I planned on dragging some logs, started her up, let her warm for a bit, then got on and again no hydraulic. I let it warm for about an hour before giving up. I noticed the hydraulic fluid was milky and seemed rather thick so i changed it, the filter and cleaned the screen. the shaft from the motor to the hydro is spinning and i watched it stop as i depressed the clutch, then start again as released the clutch. I have no whines and everything seemed very strong when it worked. I have checked the linkage to the gear select and it is selecting. tried moving the 4wd selector to make sure it isn't bound. I hear a very slight hiss when i push the forward reverse pedal, I only hear it with the idle as low as it will go as it is so faint. I haven't seen any fluid leaks or level change in fluid. I sure would appreciate any help and thank you much in advance.

 

[tsafa]

What is the temperature outside? Hydraulics need some time to warm up when it is freezing out there. Let the tractor warm up for 30 minutes to eliminate the cold as a factor.

 

[marktomes]

I will now be in the habit of warming better before use. My last attempt to use the tractor resulted in an hour plus warm up and still no hydraulic function. Where should I start my search for the problem? I am not really a hydraulics guy, I was really hoping for an electrical problem ;-).

 

[North Idaho Wolfman]

Check to make sure that it doesn't have any loose hose clamps on the suction side of the input to the pump.

It's sounding like your going to be needing a hydraulic pump.

 

[marktomes]

will the hydro pump give warning before going out? whining or weakness? The first few weeks i had this it ran strong! no problem pushing pulling or lifting manure in the compost pile. what does a hydro pump go for these days? is it pretty a straight forward install?

 

[Wild and Free]

The fact you lost everything at the same time would tell me that the pump shaft broke or the splines stripped out. It is mounted on the right side of the engine under / behind the fuel filter.
Does the PTO work?

OOPs missed where you said it quit and started working again, sounds like it could be either a bad pump or a bad relief valve causing a bad bypass situation, the relief is on the right side of the tranny above the F_N_R pedal with the flow valve lever on it, does it get warm or hot really fast in that spot?

I loose the hyd function on my B2150 if I pull the 3 pt lever up too far as I don't have a stop screw for the up position and it will go over relief and I lose most hyd function it gets really really slow but it will still propel slowly.

 

[North Idaho Wolfman]

Great advice Wide and Free!!!

Start with that, I've heard of the 3 point lever causing these issues.
The relief valve is a good bet too.

If you go to Kubotabooks.com you can get the parts manual for it and that helps a lot in finding and seeing the parts.

You can always go to Kubota.com and go to Parts, Illustrated parts, Agree on the bottom, Then put in your model, Then click open.

 

[Wild and Free]

Mark I forwarded a link to the factory B2150 service manual in a PM.

 

[Big Kahuna]

I read this over and over and I come up with this.
It worked when you bought it, July? correct? but now its having problems.
First you have 2 pumps, the one on the engine right side takes care of the 3 point, then you have the one that driven by the engine thru a clutch set up for transmission movement, follow me, the only thing they have in common is the use the same fluid from the rear end housing, now the oil was milky and thick which tells me is was not hydraulic fluid, which in turn is way you begin to have trouble because of the temp change outside, you changed the hst filter, correct? is it Kubota filter? filters play hell when they don't work. I think your system is all gummed up and needs a good flushing with diesel fuel, I really don't think you have a serious problem but got a valve hung up in the transmission/reservoir area and fill her back up with some good Hytrans fluid.


Big Kahuna

 

[Wild and Free]

BK has some good points and after looking through the service manual it does have a hydraulic pump and a tranny pump and since they share the same oil but 2 separate sump screens according to the book it gets interesting now since both circuits quit at the same time indicating a fluid issue.

 

[marktomes]

Wow, great information gents. So here is the list of answers and such. The PTO works, I changed the fluid and filter (i used a Napa Gold 1268 filter because of availability, I will order a kubota filter). After letting the old fluid sit in the jugs in my barn I see I had at least a half gallon of what I suspect was water in the system, maybe it was another type fluid mixed in I haven't investigated yet. Big K, how do I flush this system with diesel? As for the 3pt is it a matter of the lever and the connecting rod (not sure if that is the term Im looking for) becoming separated? I am sure the lever is in the down position but maybe it slips off being pulled up too far? Or was that ruled out because the two pumps are separate? Ill check anyway. I think Im getting closer to "She ain't pretty but she runs". Thank you much Kahuna, Wolfman and Wild. I hope to report good news tonight!

 

[marktomes]

Big thank you to Wild and Free for the service manual, that will be VERY HANDY!

 

[BAP]

What's the temperature outside there now? If it is at or below freezing, could be some of that water has frozen blocking off the intake screens or filter. Water will settle to the bottom and freeze. Once it freezes inside the trany rear end sump, it takes a lot of warming to thaw it out as all that steel holds the cold for a long time. If you have a warm garage, put it in it for a few days, and pull all the drain plugs, screens, and filters and let it sit there and drain out for a couple of days. If you get more water out of it, then that is your problem. I have seen enough water accumulate in older tractors from condensation over the years, to keep the wheels from turning. You will want to flush it after it is thawed, (if it froze in the first place), the water and oil will create sludge that will plug it up again if not flushed out. Good luck and keep us informed.

 

[marktomes]

Ok, I now have hydraulics! Sorry for the lack of response, we had the flu run through our house so I was down for a day. I went out yesterday since it was above 50, started her up (no hydro), let her warm for a bit (no hydro), fiddled with levers and checked linkages (no hydro), moved the directional valve selector and got weak hydro, then moved it some more to get full hydro. This wasn't my first time moving the directional valve to check but must have been where the blockage was. I worked the heck out of my FEL making mountains of manure, I let her run for a bit and worked the 3pt with a back blade, then a whole lot of up and down of the 3pt and FEL in hopes that what ever was gooped up would work loose. We should be back down to real Michigan December temps in a few days so I can check it again. Thank you All very much for all the assistance, I hope to return the favor or pay it forward some day some how.