Go Bottom2 filters for the hydraulic fluid
 | ihookem
Join Date: Jul 2006 Posts: 49 Allenton, Wisconsin 
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2006-07-19 132399
I have a Kubota B7510 and noticed that it has 2 filters for the hydraulics. I asked the guy at the kubota dealer and he didn't know why but acknowledged that they did. Why is this? I changed the filters at 60hrs. I did not change the fluid but am going to soon. Also, why the need to change fluid so soon? Is there a real reason for this or does Kubota just want to sell fluid at 4 bucks a quart? Any answers are appreciated, thanks.
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Add Photo2 filters for the hydraulic fluid
 | Peters
Join Date: Feb 2002 Posts: 3034 Northern AL 
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2006-07-19 132402
If they are different numbers one is rough filtration and the other is fine. I this is normal for any filtration process. One takes out the large particles and the other takes out the fine particles. If you are doing ultra filtration you may have as many as 5 or 6 different filter membranes. ....
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Add Photo2 filters for the hydraulic fluid
| 12251hd
Join Date: Dec 2004 Posts: 37 VA & OH
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2006-07-19 132403
I'm sure the experts will weigh in, but let me give you my lay view. I suspect your hydraulic oil drives everything on your tractor; it does on my Kubota machines. (My RTV has 2 hydro filters: one suction, one pressure.) The tolerences on these machines are very tight and any bit of grit moving around will eat away at the discs, pumps, and seals. I have found that, if routinely serviced, a Kubota engine will last forever. I want my transmission and hydraulics to last as long. So I decided from the start to follow the recommended service. Good luck. Dave/ ....
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Add Photo2 filters for the hydraulic fluid
| hardwood
Join Date: Dec 2002 Posts: 3583 iowa
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2006-07-20 132414
Ihookem; I don't know the specifics about Kubota filter systems but that first early hour fluid and filter change are probably the most important in prolonging the lifetime of your tractor. Any new machine will have bits of metal or casting sand that did'nt get completly flushed during manufacturing. Frank. ....
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Add Photo2 filters for the hydraulic fluid
 | beagle
Join Date: Jan 2004 Posts: 1333 Michigan 
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2006-07-21 132492
There are 2 filters for two different systems. One filter is for the hydrostat, the other is for the tractor hydraulics. The hydrostat is a closed loop system that is fed by the charge pump for "losses". The hydrostat requires a seperate filter since the hydraulic fluid is "mostly" cycled in the system. They do have different filtering specs, mostly for the requirements of the hydrostat.
If you are changing filters, make sure you also clean the screen on the suction line. You will be surprised how much residue is trapped on the screen. Especially during the 50 hour change. ....
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Add Photo2 filters for the hydraulic fluid
| ihookem
Join Date: Jul 2006 Posts: 49 Allenton, Wisconsin
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2006-07-22 132522
Beagle, or anyone who knows, Where is the screen on the suction line? is it close to one of the filters? Also, one of the filters were 12 bucks at the Bota dealer. Anyone know where I can get one cheaper? The other I got at Fleet Farm for 3 bucks. Just wondering if Fram or anyone elsemakes both filters. ....
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Add Photo2 filters for the hydraulic fluid
 | DRankin
Join Date: Jan 2000 Posts: 5116 Northern Nevada
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2006-07-22 132525
With all due respect, finding cheaper filters for my hydrostatic transmission is the last place I would look to "save" money.
If you are like most of us, you rack up 70 to 100 hours a year on your tractor. Do the math. The 9 bucks you saved on a cheaper filter equals about a penny a day.
All this assumes that the filter you found really does meet the specs for the high pressure, flow and filtration qualities necessary to go the distance in your transmission.
I have also tried differnt oils and Kubota's Super UDT provides more power and speed.
Sometimes you can save a couple of bucks by finding discount Kubota parts on-line.
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Add Photo2 filters for the hydraulic fluid
| beagle
Join Date: Jan 2004 Posts: 1333 Michigan
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2006-07-22 132527
The suction line is probably on the left side of your tractor, near the rear axle housing. Check your owners manual, it will tell you exactly where it is for your tractor. You can do your tractor a lot of good by making sure it is clear. It will be a hard plumbed line with a 17 or 18mm bolt head into the transmission reservoir case.
I agree, the last place you want to save $ is on your filters. Especially the hydrostat filter, since all hydrostats are created somewhat differently. You need to make sure the filter is matched to the hydrostat system. ....
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Add Photo2 filters for the hydraulic fluid
| ihookem
Join Date: Jul 2006 Posts: 49 Allenton, Wisconsin
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2006-07-22 132530
Ok, I just get a little cheap once in a while about filters and stuff. I guess it doesn't matter much after the long run. And thanks about mentioning the screen in the hose line. I didn't know it was there. I'm new to compact tractors but with the cost it pays to maintain, even over maintain doesn't hurt I guess. I payed more for my 60" mmm than most people pay for a whole lawnmower. So far the 7510 has been more than what I expected. ....
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