3pt Lift bleeds done quickly-Kioti CS2410

[rockybartlow]

Bought the tractor used 5 years ago. With a 5' back bladed it would bleed fully down with tractor running in several minutes.
-Yesterday I was dragging a branch with it hooked to my 3pt ballast box. Ballast box/3pt will bleed fully done in well under a minute.
-Control knob in middle of seat fully closed, 3pt lifts fine. FEL loader lifts and holds fine. Oil level is good.

After reading another post for a kubota with similar issue is seems that the o rings by the piston are the most obvious cause.

#6 in the diagram is the piston
-Am I correct in assuming that o rings part #7 and #8 are the correct o rings for this repair or am I misreading which o rings need replacled?

Thanks for any help!

 

[ptsg]

Yes, #7 and #8 are indeed the seals you need to replace. It's usually just an o-ring and a backup ring.

One test you could do to rule out either bad seals or a stuck open control valve is to raise the 3 pt, close the knob for the drop rate speed adjustment and move the 3 pt lever to lower. If it still drops, then it's indeed the piston seals.

 

[rockybartlow]

Thanks. I did do that test. Closed it still drops. Open it drops much faster.

Thank you

 

[Tx Jim]

Sounds as if rockshaft piston seal has failed or RS control valves aren't seating properly.

 

[Rustyiron]

Depending on how "deep" you have to disassemble it, I'd replace every O ring you can.