B6000 Hydraulics.

[pcdreams]

So I got the old Kubota out today and after started, let it run for about 20 minutes to get the hydraulic moving. Used it yesterday and bout 2 hours this afternoon to plow snow. Near the end of of use the blade wouldn't lift/turn anymore and neither would the rear lift. I didn't find any leaks on the lines, cant get under it right now. However I did notice that the fluid had backflowed out the gearshift (this tractor has a shared transmission/hydro system). I'm a bit at a loss unless it's the pump. Is it possible for the fluid to freeze while it's in use? (we're not talking cold, it was 4 over night but in the 30s while I was using it).

I did drain and replace all the fluids this fall to try and be preventative of such situations.

 

[Roadworthy]

I don't think the fluid has frozen. If you've got some overflow at the transmission expect a clogged vent. As far as your hydraulics go, check the level. If it's low and you have no leaks check the engine oil level. If you lose a seal in your hydraulic pump it can put hydraulic fluid into the crankcase.

 

[Russell King]

Is there any diverter in the hydraulic system that is turned to get power to the front end or rear end of the tractor?
It may be in a poor position to operate either system by being bumped or accidentally turned.

 

[pcdreams]

I don't think the fluid has frozen. If you've got some overflow at the transmission expect a clogged vent. As far as your hydraulics go, check the level. If it's low and you have no leaks check the engine oil level. If you lose a seal in your hydraulic pump it can put hydraulic fluid into the crankcase.

Thank you. I will check this out and post back what I find

 

[pcdreams]

Is there any diverter in the hydraulic system that is turned to get power to the front end or rear end of the tractor?
It may be in a poor position to operate either system by being bumped or accidentally turned.

I'm fairly new to hydraulics, but I don't believe so. This is an old 70s model tractor. I don't have any remotes or anything like that, just a lever that lifts the arms on the back and 2 spools on the front that control up/down/left/right of blade. I don't have to flip any controls to run the lift rather than the front blade.

 

[Russell King]

Check your engine oil level also. A failed seal on the hydraulic pump will pump hydraulic fluid into the engine crankcase and have reduced functionality.

I assume that you have only the engine mounted pump and no additional add on pumps.

 

[pcdreams]

Check your engine oil level also. A failed seal on the hydraulic pump will pump hydraulic fluid into the engine crankcase and have reduced functionality.

I assume that you have only the engine mounted pump and no additional add on pumps.

correct