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2305 Hydraulic Failure - but still drives.

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10K views 19 replies 8 participants last post by  Poffy  
#1 ·
Hi all - new here - recently bought a 2305 with a loader. Up until tonight all I had done is change the fluids and buy attachments. Finally got to work tonight digging a small area for interlocking pavers, but after about half an hour when all of a sudden the sound changed (went silent in transmission area), all you could hear was the engine running, and the drive shaft spinning. At this point you could drive forward and reverse, and let the bucket and 3pt hitch down, but otherwise no hydro lifting, and no power steering. Fluid appears to be high, if anything, but was bang on when I started, as I had just serviced it.

If I had to guess i'd say the pump was getting noisy and then failed, but I'm wondering if this is realistic, as I don't know S#$$ about hydrostatic.

I saw a couple of other threads on this, but nobody ever posted resolution that I could tell..

Any help is appreciated.
 
#3 ·
I’m not super familiar with the 2305 or where the pump is located. Hopefully it’s somewhere easy to get to like the 1 series, on the very back of the transmission housing. I would remove the pump and inspect the drive key/input shaft. Sounds like it let go.

The reason your transmission is still working is it’s still full of fluid. But it will leak down internally, which is normal. Once the fluid is out or low, it won’t want to work anymore. Do not force it, don’t even attempt to. You could severely damage it if you run it a long period of time without the charge fluid (coming from the main pump) is topping off the system. It could essentially run dry with a full reservoir of fluid.
 
#5 ·
I’m not super familiar with the 2305 or where the pump is located. Hopefully it’s somewhere easy to get to like the 1 series, on the very back of the transmission housing. I would remove the pump and inspect the drive key/input shaft. Sounds like it let go.

The reason your transmission is still working is it’s still full of fluid. But it will leak down internally, which is normal. Once the fluid is out or low, it won’t want to work anymore. Do not force it, don’t even attempt to. You could severely damage it if you run it a long period of time without the charge fluid (coming from the main pump) is topping off the system. It could essentially run dry with a full reservoir of fluid.
Excellent information! :bigthumb: :bigthumb: :bigthumb: Thanks
 
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#4 ·
Hi all - new here - recently bought a 2305 with a loader. Up until tonight all I had done is change the fluids and buy attachments. Finally got to work tonight digging a small area for interlocking pavers, but after about half an hour when all of a sudden the sound changed (went silent in transmission area), all you could hear was the engine running, and the drive shaft spinning. At this point you could drive forward and reverse, and let the bucket and 3pt hitch down, but otherwise no hydro lifting, and no power steering. Fluid appears to be high, if anything, but was bang on when I started, as I had just serviced it.

If I had to guess i'd say the pump was getting noisy and then failed, but I'm wondering if this is realistic, as I don't know S#$$ about hydrostatic.

I saw a couple of other threads on this, but nobody ever posted resolution that I could tell..

Any help is appreciated.
Questions: Is this a used machine? If not new, what year is it?
 
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#10 ·
Well I got the pump off, and It seems to be ok, at least to pump SOMETHING. I started it up with the pump off, and the shaft offthe tramsmission that drives the pump does not spin. With it not running though, I can turn said shaft very easily, leading me to believe the problem is a gear further back inside the center plate or front half of transmission?
 
#12 ·
I do have the technical manual.

Well I found the problem, or at least a problem. The bearings holding the upper right center housing gear in place are gone - and the gear fell back in a bit, disconnecting it from the next gear which drives the pump. I got as far as removing the front third of the transmission, and I THiNK I can fix it from there. Will try as soon as I can get parts. I imagine I’ll find the roasted bearing parts in the suction screen.
 
#13 ·
Can you post some pics? I’d sure like to follow along with this repair. :hi:
 
#16 ·
Ouch, hope the tech manual helps out here-good luck!
 
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#17 ·
Quick update - couldn't change the pump shaft gear bearings without removing the center housing, so I did that. Have to pull the FWD drive shaft and take a hydraulic line off but really not bad. The pins in the drive shaft were a bit of a bear. Not having to remove the housing was very wishful thinking. I have now installed the new bearings and will hopefully begin re-assembly when I pick up the center housing gasket later today.

The biggest battle has been dirt and gasket material, which gets into every bearing no matter what you do. Especially when you don't really know what you are doing. I would change all the bearings in that center housing if they were in stock, but they aren't, and I can't afford a 2 week delay, so I'm gonna clean them as best as possible and pour some hydro oil over them before re-assembly.
 
#18 ·
Another update - a few days late here, but I got the gasket and got everything back together successfully on the weekend. All seems good, and the tractor is quieter. I believe one of those pump shaft bearings was toast when I got the tractor, placing the entire load on the remaining bearing, and when I started using the loader for some digging it was too much for it.

When I have some time I'll try to organize and post the pictures that I took. The most difficult aspects of this job for me were:

1. Getting the drive shafts off and on. If it wasn't the tight quarters for the snap rings, it was rusted pins, and constantly trying to manufacture tools the right length and width to drive them out. Those things are a pain.

2. Dirt everywhere. Trying to keep the internals clean was difficult. I used 4 cans of brake cleaner during re-assembly to make sure everything was as clean as possible.

3. Scraping off the old gaskets. In the end, the only thing that worked was permatex gasket remover, and a wire wheel in the die grinder. And it did work well.

Everything lined up and went together well. I believe there are other bearings in the transmission making noise under load. I'm not sure how much whine is normal vs. when a bearing is failing, but I'm sure I'll be doing this again someday. The only thing thats weird, and I wouldn't have known if I hadn't driven the tractor before, but the Hi/Lo/N switch no longer has positive stops. I had the lever removed to get the body off, but didn't have that section of the transmission open at all, so I have no idea what happened there.

Unrelated problem - I seem to have a leak from the steering column area (looks like there is a steering control box there, so maybe where the lines connect?) Has anyone else had this? I have to take the body and floor off again to get to it it would appear. Just hoping it's nothing worse than a hose or gasket.
 
#19 ·
Enjoyed reading your informative thread. Thanks for the details :good2:
 
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