L5030 HST Leaking PTO Control Valve

[MODiesel]

Hi All:

I noticed that my L5030 HST has developed a slow leak around the shaft that controls the PTO engagement (see attached pic). I suspect it's nothing more than a seal somewhere but Kubota doesn't have a parts breakdown of this unit (Part # TD060-51450) and the online price for the assembly is $471. Has anyone had to disassemble this valve and/or dealt with leaks from this point? Looking for some tips before I end up shelling out cash for what otherwise is functioning perfectly. I just don't like leaks or leaving them be.

Thanks in advance!

 

[David_Kb7uns]

On the Kubota parts section there is a breakdown of the valve. Under speed change shift fork/shift lever

Parts breakdown E12702 item 110 kubota part 09500-20358 for the shaft seal 04811-06630 for assembly o ring.

Now just get it changed without dumping 10 plus gallons of oil.

David

 

[MODiesel]

That's great, thanks!! I'll post an update based on what I find once I can pull the valve.

 

[MODiesel]

So I got this sorted out. Sorry, it was too dark and windy to take pics, plus my hands were a mess from the hydraulic fluid. However, all things considered it wasn't bad. Of note:

1. The actuator arm from the lever was easy to both remove and replace.
2. The banjo bolt/supply tube has two copper washers on each side, and the backside one will fall into your catch can/bucket as soon as the bolt is removed so you have to be ready for it.
3. The 3 bolts holding the assembly come out easy but the minute you start to remove the assembly you'll get a flood of hydraulic fluid.
4. I had the tractor parked on an angle so that the side I was working on was positioned up-slope. I first cleaned the entire area with brake cleaner and then wiped it down so the drained oil was as clean as possible. I then used a clean 5gal bucket underneath. Even on an angle it only filled up to within 2in of the top of the bucket, and once level it looked to have been about 4.75 gal of drained oil.
5. You'll have to disconnect the spring on the assembly if you want to remove the central shaft. I found out this is not absolutely necessary but it makes removing the oil seal easier.
6. The shaft is held in place with two c-clips. The paint on the shaft and the clips will make removing them a pain, especially the external lever. I had to use a razor blade to shave off paint to be able to remove the lever from the shaft.
7. The old oil seal was bad - it was easy enough to remove and press back in, but you have to press it in over the shaft since there's a necessary c-clip on the shaft under the seal. So use a deep well socket tall enough to clear the shaft.
8. The service manual says to remove a "tube" from the transmission housing and plug that back into the housing before inserting the assembly. It was too dark for me to see well into the interior of the transmission so I left the tube in and was careful to seat the assembly onto it. That worked fine.
9. After cleanup, reassembly was a reverse of the removal. Once buttoned up and the old oil was transferred back to the tractor the PTO started up fine and the control valve is no longer leaking.

Total cost was two seals (I also replaced the one on the assembly at the transmission housing), my time, and a little top-off hydraulic oil. Nothing daunting about it.