I have kubota LT245DT. While trying out a new box blade the tractor slowly lost hydraulic pressure. I soon lost any lifting ability on the 3 point and the front bucket would not raise up. Oil was full. What could be wrong?
Lost hydraulic pressure
- Thread starter Ulsterman
- Start date
First thing I would check is flow and pressure at the inlet port on the loader valve. You can do that with a clean 5 gallon bucket and a $15 pressure gauge.
Dan
Ok, will do that first. I am assuming at least a 3,000psi fluid gauge I’ll try to find a $15 one.
Thanks, will let you know how I get on.
3000 PSI will give you the best resolutiion
Disconnect the inlet hose at the loader valve and connect the gauge to the hose. Stsrt tractor, set engine RPM ti max, and read pressure.
Dan
Disconnect the inlet hose at the loader valve and connect the gauge to the hose. Stsrt tractor, set engine RPM ti max, and read pressure.
Dan
BAP
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2012 Kubota 2920, 60MMM, FEL, BH65 48" Bush Hog, 60"Backblade, B2782B Snowblower
Before pulling lines apart I would start with the most basic thing and pull the hydraulic screen filter and make sure that is not plugged up. Considering your symptoms and the way it slowly got worse, that is very dirty with something that has deteriorated.
I now have a gauge. But when I start the tractor after it sat a month the pressure was fine front bucket lifted fine and the rear 3 point was operating properly, however after it gets warmed up the pressure slowly drops to nothing. Is tat the filter.
Where is the filter and how do I get to it?
Where is the filter and how do I get to it?
That is indicative of a worn pump. When the oil is hot do you get any flow from the hose if you remove the gauge ?
Dan
Last edited:
Russell King
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L185F, Modern Ag Competitor 4’ shredder, Rhino tiller, rear dirt scoop
There may have been two different types of filters at different times on that tractor.
The first type was a screen in the transmission case. It is located on the left side of of the tractor in the same location as the suction line that is on the right side that runs to the pump. The screen is located underneath a domed cover with two bolts holding it on. There is a spring and an o-ring underneath the cover also. Once you remove the cover, transmission fluid will drain out if you didn’t drain it first. The screen is a tube and you may have to grab it with needle nose pliers to pull it out.
The other type of filter was a canister filter on the suction line side, near the pump (I think). There was no screen on this type if I recall correctly.
The first type was a screen in the transmission case. It is located on the left side of of the tractor in the same location as the suction line that is on the right side that runs to the pump. The screen is located underneath a domed cover with two bolts holding it on. There is a spring and an o-ring underneath the cover also. Once you remove the cover, transmission fluid will drain out if you didn’t drain it first. The screen is a tube and you may have to grab it with needle nose pliers to pull it out.
The other type of filter was a canister filter on the suction line side, near the pump (I think). There was no screen on this type if I recall correctly.
I dont think that explains good pressure at cold startup followed by loss of pressure when hot.
Dan
Russell King
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L185F, Modern Ag Competitor 4’ shredder, Rhino tiller, rear dirt scoop
I don’t think so either unless there is a screen with something blocking it that falls away while sitting and then builds back up as it runs. That would be a long stretch for a problem but I assume he will need to know where the filters are at some point in time.
Thats why I asked if he still had flow. Intermittent supply seems unlikely but new pumps are expensive experiments.
Dan