air in hydraulic lines

[Azza]

Kubota B 8200 not been used for couple of months Started and hydraulics worked fine; FEL & slasher. Short while using and stopped functioning, not moving at all. Hydraulics emitting noise.

 

[ctfjr]

Did you check your fluid level? When was the fast time the filters were changed?

 

[Azza]

Did you check your fluid level? When was the fast time the filters were changed?

only done couple of hours since fluid change and filter cleaned. Fluid level checked regularly and maintained to full mark. Previous have managed to release trapped air by disconnecting hydraulic hoses but not working this time

 

[Azza]

only done couple of hours since fluid change and filter cleaned. Fluid level checked regularly and maintained to full mark. Previous have managed to release trapped air by disconnecting hydraulic hoses but not working this time

uncoupling all three hoses

 

[North Idaho Wolfman]

Is the tractor not moving at all, or just the hydraulics?
If it doesn't have a clogged filter screen or a suction leak then you're probably looking at a damaged pump or drive.

 

[Azza]

Is the tractor not moving at all, or just the hydraulics?
If it doesn't have a clogged filter screen or a suction leak then you're probably looking at a damaged pump or drive.

 

[Azza]

Your contribution appreciated. Tractor works fine
tractor runs fine. I'm betting on air in hydraulics given the abnormal noise . Will check intake lines sn d go from there

 

[Dave_eng]

Your contribution appreciated. Tractor works fine

tractor runs fine. I'm betting on air in hydraulics given the abnormal noise . Will check intake lines sn d go from there

Does the 3 pt hitch work?
Hydraulics are self bleeding with use.
However, if your suction side of the pump and the suction line have air leaking in then you will always have air.
Often suction lines have places where there is a rubber joint. These crack and let air in but not fluid out so often best to just replace these pieces.

Hydraulic lines re-installed in the wrong place can cause big issues...........
Dave

 

[TheOldHokie]

Your contribution appreciated. Tractor works fine

tractor runs fine. I'm betting on air in hydraulics given the abnormal noise . Will check intake lines sn d go from there

Any air in the line should be gone in the first couple of minutes of operation. I think I would start by disconnecting the power beyond return at the hydraulic outlet block. Stick it in the transmission filler, start the tractor, and watch the flow. It should be steady with no signs of air.

The power beyond hose is the one towards the rear of the tractor.

Dan

 

[Azza]

Does the 3 pt hitch work?
Hydraulics are self bleeding with use.
However, if your suction side of the pump and the suction line have air leaking in then you will always have air.
Often suction lines have places where there is a rubber joint. These crack and let air in but not fluid out so often best to just replace these pieces.
View attachment 110514
Hydraulic lines re-installed in the wrong place can cause big issues...........
Dave

Any air in the line should be gone in the first couple of minutes of operation. I think I would start by disconnecting the power beyond return at the hydraulic outlet block. Stick it in the transmission filler, start the tractor, and watch the flow. It should be steady with no signs of air.

The power beyond hose is the one towards the rear of the tractor.

Dan

Thanks for the relevant info Dan / Dave. Will follow up and see what results.