Oil & Fuel Hydraulic oil replacement L4310 HST

[zozo]

Have the correct (i think) filters, but am not sure of the correct procedure to change fluid. What about the oil in the FEL? How do you get it out?

Looked at specs... 10.5 gallons total?

 

[Peter 315]

You don't and never will get all the hyd oil out just change the filters and what oil comes out...... I like like to change the hyd oil when its hot/warm after running the tractor for awhile...

 

[old and tired]

Pulled off the Web... "...Filters TA040-37710 which is main hydraulic, install on right side and TA240-59900 which is filter for HST transmission and installs on left side..."

Do you not have an Owner Manual?? They have the correct procedure listed there... Workshop manual is 2 parts...

http://www.kubotabooks.com/AutoInde...df&AutoIndex=daa56548b75242b6f5de32419fae0333

http://www.kubotabooks.com/AutoInde...df&AutoIndex=daa56548b75242b6f5de32419fae0333

You could have the FEL up and curled - once you shut off and draining, you might lower the FEL (with tractor off) to get a bit more oil out but I don't worry about it...

Also, 10.5 gallon capacity might be when ALL the oil is out. Check the level when filling past 9.5 gal.

 

[sandyc]

Have the correct (i think) filters, but am not sure of the correct procedure to change fluid. What about the oil in the FEL? How do you get it out?

Looked at specs... 10.5 gallons total?

The amount of fluid in your FEL really shouldn’t matter. Lower the FEL to the ground so there isn’t as much fluid in it.

 

[Grandad4]

At the risk of stating the obvious...
Yes you do change the hydraulic fluid at regular intervals. The fluid in the transaxle is the reservoir for all of the tractor and it is something like 10.5 gal. If it's a hydrostatic drive, highly recommend you use Kubota SUDT2- expensive but worth it.

 

[WileyG]

I recently did the 800 hour service on my L3430 HSTC and filled it with SUDT2 and I do believe the normal hydrostat whine is quieter. I had read on here that it would be. Spec said that it would hold just over 11 gallons. I had removed the loader at my farm when I had the tractor at home for this maintenance and it barely held 10 gallons.

 

[Richard]

I might get laid out for this comment...but I had some water in my hydraulic fluid and wanted to remove as much as I could short of pulling each cylinder off and opening them up and blowing air through the system...

I raised the backhoe, found the hose that pushed it up and left it be. (it's under pressure) I went to the OTHER hose that now has very little fluid on that side of cylinder and loosened it so it was open to air. I then went to my controls (machine is turned off) and slowly lowered the hoe....which pushed fluid out via gravity of the side holding it up, sucking air in the other side so that when it was done, I probably had say, 90% of the oil out of that cylinder. I did the boom and dipper sticks like this, then went to the loader and managed to extract "a lot" of the fluid from there but I think I was more successful on the backhoe side.

Oil got pushed into the tank, drained all that out and refilled.

I might do another swap next summer to give currently new fluid time to work around and dilute everything that was left behind.

Then you have the hoses full of fluid, the controls with fluid... so I knew I'd never get as much out as I really wanted.