Kubota L5030 (no Hyd functions)

[texasjohn]

You're a mechanic and have the manual. You'll figure it out.
Got to be something simple since failure was sudden and all encompassing.
given that there actually is fluid, functioning filters, that all hoses are properly connected....there are quick connects that have to be properly installed for FEL to work...that there is hydraulic pressure...not too hard to determine...and that the pressure relief valve is properly installed....then the pressure pump seems at fault.
However, since there has been someone messing with the system...I'm going to bet that the pressure relief valve (see manual to find) was not properly reinstalled. Listen for it to hiss...

After you see the tractor, come back with more details...those of us with an L5030 can offer ideas...but the hyd system has been flawless for me and I do not recall any other posts of gross hyd failure...it's gotta be something simple....

 

[johnpawl]

So the suction line is collapsing then?

James K0UA

I would think so although his description was that it's soft.

 

[johnpawl]

You're a mechanic and have the manual. You'll figure it out.
Got to be something simple since failure was sudden and all encompassing.
given that there actually is fluid, functioning filters, that all hoses are properly connected....there are quick connects that have to be properly installed for FEL to work...that there is hydraulic pressure...not too hard to determine...and that the pressure relief valve is properly installed....then the pressure pump seems at fault.
However, since there has been someone messing with the system...I'm going to bet that the pressure relief valve (see manual to find) was not properly reinstalled. Listen for it to hiss...

After you see the tractor, come back with more details...those of us with an L5030 can offer ideas...but the hyd system has been flawless for me and I do not recall any other posts of gross hyd failure...it's gotta be something simple....

Thanks, John. I'll get more info up after I get back from looking at it. Yep, it sounds like something basic.

 

[J_J]

If you say the fluid level is OK and the filters are new, and the engine is running, then the pump must not be sucking fluid.

If someone checked the pump out, what does that mean, Did they connect it up and pump fluid?

If the tractor is HST, that pump is separate from the implement and steering pump.

So if you have no fluid being pumped to the steering and the implements, there must be no fluid getting to the pump.

Remove some hoses and check flow, and how much.

If the fluid level went low at some time, the pump may need primed,

A hyd gage would certainly help to establish pressure when and where.

If you think the suction hose is collapsing, look at it before you start engine, and then look at it after you start the engine.

 

[johnpawl]

Update: I finally got around to looking at this tractor. Found a small pinhole in one of the metal lines.
This was sucking air and made the pump lose prime. Line is repaired and everything is good now.
Thanks for all the feedback. Sorry it took so long to post the fix.

 

[moship]

Any ideas what caused the pin hole?

 

[k0ua]

Update: I finally got around to looking at this tractor. Found a small pinhole in one of the metal lines.
This was sucking air and made the pump lose prime. Line is repaired and everything is good now.
Thanks for all the feedback. Sorry it took so long to post the fix.

Thanks for checking back, that is kind of what I figured, No fluid going to the pump, only air...That would do it.

James K0UA

 

[johnpawl]

Any ideas what caused the pin hole?

Rubbing/vibration against the frame.

 

[moship]

Do you think it is something all Grand L30 owners should check for to prevent a similar issue? Is it possible to photo the general location of failure point?

 

[johnpawl]

Do you think it is something all Grand L30 owners should check for to prevent a similar issue? Is it possible to photo the general location of failure point?

here is the pic you asked for.