No power kubota 5030D

[riverhouse3157]

so it will creep along or creep backwards at like 1-2 miles an hour … higher revs no difference
Is there a neutral switch or a switch that causes clutch not to engage properly . This is a HST .
I can carry out a hydraulics test for pressures tomorrow but is there a sensor that I should test ?
Engine starts fine and all linkages in good condition .
Before changing the clutch what should I check
Anything obvious . I’m not a novice but have limited experience. I’m wondering if I shouldn’t also check any linkage positions that may cause the clutch to not engage properly ..
Any help would be much appreciated

 

[D2Cat]

Is this a newly acquired machine, or how/when did conditions occur?

 

[riverhouse3157]

newly acquired ..engine starts right up and front hydraulis all good just seems to have no power .i had someone adjust the rocker pedal that goes forwards /backwards but almost no real power and no real change in speed if i add more acceleration..a mechanic adjusted the linkage below the rocker pedal as all we had was neutral but now only forward and reverse and no apparent neutral
i have thekit to check pressures and the wsm manual but was hoping it might just be a bad electrical sensor /switch thats stopping engaing clutch ..rather test everything obious befor pulling apart and redoing clutch..was thinking there may be a neutral sensor somewhere..

 

[North Idaho Wolfman]

The clutch is 100% Mechanical.
It has zero interaction with the HST pedal.
What does it feel like when you press the clutch pedal?
Does it feel like it disengages and engages?
You need to do a PTO test to see if the mechanical clutch is out.

 

[riverhouse3157]

doesn't feel like it engages or disengages, but must do as I have reverse slow crawl and forward slow crawl.
The Pto test.
Do I measure the pressure at the pto valve?
Do I remove the plug on the PTO valve spool and attach a pressure gauge there..I can't really warm the transmission up much because the tractor moves so slowly,

suggesting over 330-370 psi with pto engaged and 0 psi when disengaged. I will attempt to increase or decrease pressure depending on reading... pressure reducing valve adjustor
Anything else

 

[North Idaho Wolfman]

No, no pressure tests needed, or will give you an answer any of your issues.
Do you have PS and do you have three point operation?
If you do then the hydraulic system is working fine.

The HST uses a separate system and is not tested with normal hydraulic testing.

You need to see if the PTO spins at speed and with force when you try and move the tractor.
If it doesn't then all signs are pointing to a fried clutch disk or pressure plate.

How many hours are on the tractor?
What do the tires look like, heavy wear?

 

[TheOldHokie]

doesn't feel like it engages or disengages, but must do as I have reverse slow crawl and forward slow crawl.
The Pto test.
Do I measure the pressure at the pto valve?
Do I remove the plug on the PTO valve spool and attach a pressure gauge there..I can't really warm the transmission up much because the tractor moves so slowly,

suggesting over 330-370 psi with pto engaged and 0 psi when disengaged. I will attempt to increase or decrease pressure depending on reading... pressure reducing valve adjustor
Anything else

You say this is a L5030D - that is not an HST.

If this in fact an HST dont confuse ground speed with power. The HST pedal varies ground speed by changing the drive ratio in the transmission.

If could be the clutch slipping but I would start by verifying the HST pedal is actually moving the speed selector lever on the transmission through its entire range. Thats a simple external visual inspection. You say you have no neutral after a mechsnic adjusted the linkage and thats not a clutch issue.

Dan

 

[riverhouse3157]

yes no neutral...will also check three point today and power steering although they do appear to be working.i will give them a good work through and check the speed selector range

 

[TheOldHokie]

yes no neutral...will also check three point today and power steering although they do appear to be working.i will give them a good work through and check the speed selector range

If there is no neutral I think its safe to say something in the HST pedal adjustment is FOOBARed.

I think I would disconnect the neutral linkage altogether (circled in blue) and verify you are getting full travel of speed control lever (circled in red)

Dan

 

[riverhouse3157]

three point goes up and down and PTO turns ,not sure how fast.i will disconect and check the range on speed control lever. thanks Dan

 

[TheOldHokie]

three point goes up and down and PTO turns ,not sure how fast

The HST tractor has an independent PTO and has nothing to do with the HST clutch. Likewise the 3pt is a separate hydraulic system and has nothing to do with the transmission.

Dan

 

[North Idaho Wolfman]

The HST tractor has an independent PTO and has nothing to do with the HST clutch. Likewise the 3pt is a separate hydraulic system and has nothing to do with the transmission.

Dan

Dan is correct, that model does have an independent PTO, so it will turn regardless of clutch condition.

 

[North Idaho Wolfman]

There is no DT in that model, only HST and GST.
I would hope the OP knows the operational difference between a HST and a GST.

 

[riverhouse3157]

There is no DT in that model, only HST and GST.
I would hope the OP knows the operational difference between a HST and a GST.

you could ask him? im likely to be here more often than anyone else thats kindly helping me sort this out. haha.thank you North Idaho Wolfman.
It is a HST

 

[riverhouse3157]

ok, having been able to properly view it today

PTO turns fast on startup but slows to same speed as tractor ie, barely moving backwards/forwards
Three-point works as it should
Tires are half-worn, and this was a council tractor. And it looks pretty clean in general, was picked up at auction 4 months ago
smells of clutch burn or slip when trying to increase speed via the throttle
The rocker pedal has a neutral but not in the resting position, as the previous mechanic attempted to improve drive speed and left it in that position.
I think it's the clutch, but I haven't yet disconnected the neutral linkage to ascertain whether we are getting full travel of the speed control lever

As Dan has highlighted previously. I will do that tomorrow
question
Is there a way to test the servo mechanism controlling swashplates, and what is its location ...
Is this servo in any way responsible for proper clutch engagement,or am I barking down the wrong rabbit hole?

 

[Shawn T. W]

What range are you trying to move it in?

I'm not really sure what's inside ... But a clutch would slip a lot less easily in Low, compared to Medium or High ...

When you say the PTO starts out fast, then slows down, how much? IIRC there is a mode on the dash readout for PTO RPM, is that what you are looking at?

 

[North Idaho Wolfman]

All signs are pointing to clutch,
You could pull the starter and see if you can see any clutch material.

 

[riverhouse3157]

ive only used the drive in low as in medium r high it moves less and i guess more slip.
i just dont want to pull this apart and then find the reason the clutch isent fully engaging is because a solonoid is not functioning correclty or the mechanical mechanisms are not connecting right .

 

[whitetiger]

the mechanical mechanisms are not connecting right

I am pretty sure that is the problem; your clutch plate is not connecting to your flywheel properly.

 

[TheOldHokie]

ive only used the drive in low as in medium r high it moves less and i guess more slip.
i just dont want to pull this apart and then find the reason the clutch isent fully engaging is because a solonoid is not functioning correclty or the mechanical mechanisms are not connecting right .

The clutch is located between the flywheel and input shaft on the HST. It is a dry plate mechanical clutch directly operated by the clutch pedal and uses a standard release fork snd throw out bearing design. Free play can be adjusted just like the clutch on a typical car, truck, or gear drive tractor. Consult the manuals for the check and adjustment procedure. One would hope your mechanic has already been down that road....

Dan