TL130 final drive issues...

Hi guys.

I have bought a Takeuchi TL130. She's a bit beat up and I noticed gear oil leaking on the tracks, so I took the final drive out and gave it to a friend of a friend to fix.

Floating seals and bearing cost a few thousand and it took a few months to source them but got it all back together and installed it in the machine.

Found the large square hydraulic part at the back of the final drive where the hoses connect was leaking and the guy who did the seals said just take it off and put some sealant on it (which I did and tried to be careful to avoid any of the areas where oil flows but who knows).

Final drives not being something he has had experience with he took that part off not realising he didn't have to. He did have to replace the 5 bolts holding it in because they were stuffed.

After I put liquid gasket on it and did the bolts nice and tight, I reinstalled it and started it back up but there was no power to that side in forward or reverse, so I let it warm up for 10 minutes and tried again, it made a shuddering noise and starting working, awesome.

Except when I went to fill up gear oil I noticed it was full of hydraulic oil. When left unused it will slowly come out at slow drip if bung is out.

I figure there is a seal between gear/hydraulic side and I have taken cover plate off and I am currently at this point in the photo.

Any guidance from here would be very much appreciated.

TIA

PS: it drives absolutely fine now and all hydraulics work great (only driven for about a minute) and I have all hydraulic filters coming in the mail.

PPS: the four connectors that go into the back of the final drive, which the hoses connect to, anybody know where to source new ones?

Anybody know a reliable source to get new final drives for these machines that's not a ridiculous price (I am in Australia) because at this point I'd be willing to buy two new final drives and not have to worry about it anymore unless it's going to be an easy fix - but probably not willing to pay over $12,000 combined, probably dreaming.

There is a lip seal on the hydraulic motor output shaft which is causing your problem. The motor has to be removed and pulled apart to replace it. It's probably the square thing you have already had off and the shuddering you experienced was because it wasn't filled with oil prior to starting the machine. Don't be surprised if the motor is now stuffed.

Tones said:

There is a lip seal on the hydraulic motor output shaft which is causing your problem. The motor has to be removed and pulled apart to replace it. It's probably the square thing you have already had off and the shuddering you experienced was because it wasn't filled with oil prior to starting the machine. Don't be surprised if the motor is now stuffed.

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When I first installed it, before I noticed the leak from the hydraulic side, it hadn't been filled with hydraulic oil before install and immediately moved when controls were moved without any shuddering?

Also, when you say it might be stuffed, do you mean the final drive won't work. Because besides the issue with the lip seal it worked great in the short time I used it to to take it out of the shed after that first couple of shudders or do you mean I may have physically damaged the surfaces where the lip seal goes and might not be able to stop the leaking hydraulic oil?

Also do you know how it may have been damaged, is it from not putting the hydraulic side back on correctly when I took it off or from not prefilling it with oil etc.?

I think I should mention that I could not find any repairers near me that would even look at the original gear oil leak or could get the parts to fix. I had no option but to DIY.

Thanks for your reply Tones and any more info would be appreciated.

#1 is what's leaking, allowing hydraulic oil to enter the planetary assembly.

As for danage to look for, where the two circled items below interface with each other.

What I was suggesting is you mentioned removing a square thing off the back of the planetary hub which is usually the hydraulic motor. Although it's attached to the planetary hub it's not part of the gearbox. Therefore removing that means any oil in it is drained. Firing your machine up without first filling the hydraulic motor can ruin the internals of the motor. It has nothing to do with the planetary hub.

Tones said:

What I was suggesting is you mentioned removing a square thing off the back of the planetary hub which is usually the hydraulic motor. Although it's attached to the planetary hub it's not part of the gearbox. Therefore removing that means any oil in it is drained. Firing your machine up without first filling the hydraulic motor can ruin the internals of the motor. It has nothing to do with the planetary hub.

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Just to check Tones... could this issue possibly have been caused by hydraulic hoses being connected to the wrong connection at the hydraulic motor and not due to it being empty of hydraulic oil?

I ask because it's possible I put them on wrong before it did the shuddering.

Specifically the two smaller ones that are the same size.

Also if it was stuffed would it not work at all or would it just generally run like crap or soon fail completely?

Because the few times I've used it, it drives great. Wouldn't know anything was wrong except the hydraulic oil in the gear hub.

Here's the full outline of what happened:

>gear oil leaking
>final drive removed
>hydraulic motor taken off (bolts replaced)
>floating seals replaced
>put back together
>final drive installed
>working immediately and perfectly (no issues)
>hydraulic oil leaking from between hydraulic motor and gear hub
>remove final drive
>hydraulic motor taken off, cleaned up surfaces and used a sealant
>final drive put back together
>zip ties holding hydraulic hoses cut to make installation easier
>final drive reinstalled
>no movement in drive when running
>warm up for ten minutes and suddenly begins working with a big shudder
>no leaks and works perfectly
>find hydraulic oil filling up gear hub
>punch it

Also, if I were to run it in this state, would it blow off the gear hub cover plate or something similar, are small runs acceptable if really needed?

Th

heymccall said:

As for danage to look for, where the two circled items below interface with each other.
View attachment 265654 View attachment 265655

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Thanks for the reply mate.

Could you just check my latest reply and let me know if there's anything to add. Possibly connected hoses to wrong connections ‍♂️