My hydraulic pump could use maybe a high volumn unit. Do they make such a unit, it just seems a little too slow wasn't to bad when I "really wasn't use to it" but after a few years its like my third hand. I have had my share o f problems with it but would be lost with out it. I had put some new seal in the pump, took it apart housing looks really good, also put a srew on filter in return line when new. I know its not commercial but would be nice to rattle bucket.
Improvements on hydraulics on Farm pro 30
- Thread starter joe1333
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greg_g
Super Member
- Joined
- Dec 18, 2003
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- 6,126
- Location
- Western Kentucky
- Tractor
- JD3720 Cab, 300X loader with 4-in-1 bucket
Before you blame the pump, have you cleaned the suction screen? Do you also have an inline filter? And what are you using for hydraulic fluid? Thick fluid and restricted filters/screens are two of the more common reasons for reduced hydraulics performance on these Jinmas.
If you haven't already, drain and flush the hydraulic system. Clean/replace filters/screens. Refill with AW hydraulic fluid: AW32 for four season weather and winter use, AW46 for warm weather areas or summer-only use.
//greg//
If you haven't already, drain and flush the hydraulic system. Clean/replace filters/screens. Refill with AW hydraulic fluid: AW32 for four season weather and winter use, AW46 for warm weather areas or summer-only use.
//greg//
RonMar
Elite Member
The thought of a larger pump has been brought up before. As these things don't use anything particularly standard, there is no larger direct bolt on pump available. Anything you did would have to be engineered specifically to fit the tractor.
I agree with Greg on fluid and suction strainer. Another thought to your slow operation may be that you are drawing in a little air somewhere on the suction plumbing running to the pump.
Where did you install your return line filter?
I agree with Greg on fluid and suction strainer. Another thought to your slow operation may be that you are drawing in a little air somewhere on the suction plumbing running to the pump.
Where did you install your return line filter?
Thanks for the replies. I use the right fluid. I had installed the filter right in front of pump on return line. I had flushed it out years ago really good. The screen I took out and ordered a new one but the new one had a tear in it and was falling apart from new, so never installed it again being I had another filter. Now you are going to say its sucking air there but I run it with the top off just to see and nothing, being it draws right off of the bottom. I think it works as good as it did ever just does'nt satifies me anymore after running neighbors john deer. I thought maybe others would like theres quicker too.
Affordable
Advertiser, Platinum Member
You said you added a filter on the suction side, when we do this we remove the filter in the hydraulic sump and open up the inlet port, it has 3-small 3/16 holes to let fluid into the suction line we open it up to full line size,use AW 32 hydraulic oil. They do make a larger GPM pump the standard is a model 310 the upgrade is a 314. I don't have the gmp rating at home
but can get it for you.
Tommy
Affordable Tractor Sales
but can get it for you.
Tommy
Affordable Tractor Sales
RonMar
Elite Member
</font><font color="blue" class="small">( I had installed the filter right in front of pump on return line.)</font>
OK, now I am confused. You located a filter near the pump? Either scenario that easilly comes to mind are both bad. If it is on the suction side, putting a highly restrictive filter on a pump suction can be real hard on the pump. The only type filtration that I have ever come across on a hydraulic suction side(without the use of a feed pump) is #100 mesh screen. This filters to about 150 microns and flows relitively well with little back pressure/restriction. A typical hydraulic filter is a cellulose media that filters as low as 10 microns. Most hydraulic filters I have experience with were designed to feed the oil through with pressure and not draw it through with vacume. Most filter assemblies incorporate some sort of bypass that opens and continues to feed oil if the filter differential pressure exceeds a preset limit(10-15PSI) such as when the oil is cold or the filter is clogged. Using this deffinition, a mesh strainer(such as originally found in the resovoir) is generally accepted as being OK. A regular filter on the inlet would be hard on the pump, restricting flow and cooling, and increasing supply line vacume inviting the induction of air into the system at the slightest leak in supply line or pump seal. Bubbles through a pump also cause cavitation which leads to metal wear/erosion.
A filter on the pump outlet, unless speciffically designed for the pressure, would just rupture.
Most filters are found just before the fluid returns to the resovoir, down stream of any high pressure.
They do make spin on strainers(metal can with #100 mesh inside). That on the pump inlet line should be OK, or at least as OK as the original filter, providing it is clean.
I would say as a test, take that add-on filter out of circuit and see how it works.
Unfortunatly the main flow on most of these tractors is back through the 3PH lift valve and directly into the resovoir. This leaves no place to easilly plumb in a return line filter on the LP side of the valve.
OK, now I am confused. You located a filter near the pump? Either scenario that easilly comes to mind are both bad. If it is on the suction side, putting a highly restrictive filter on a pump suction can be real hard on the pump. The only type filtration that I have ever come across on a hydraulic suction side(without the use of a feed pump) is #100 mesh screen. This filters to about 150 microns and flows relitively well with little back pressure/restriction. A typical hydraulic filter is a cellulose media that filters as low as 10 microns. Most hydraulic filters I have experience with were designed to feed the oil through with pressure and not draw it through with vacume. Most filter assemblies incorporate some sort of bypass that opens and continues to feed oil if the filter differential pressure exceeds a preset limit(10-15PSI) such as when the oil is cold or the filter is clogged. Using this deffinition, a mesh strainer(such as originally found in the resovoir) is generally accepted as being OK. A regular filter on the inlet would be hard on the pump, restricting flow and cooling, and increasing supply line vacume inviting the induction of air into the system at the slightest leak in supply line or pump seal. Bubbles through a pump also cause cavitation which leads to metal wear/erosion.
A filter on the pump outlet, unless speciffically designed for the pressure, would just rupture.
Most filters are found just before the fluid returns to the resovoir, down stream of any high pressure.
They do make spin on strainers(metal can with #100 mesh inside). That on the pump inlet line should be OK, or at least as OK as the original filter, providing it is clean.
I would say as a test, take that add-on filter out of circuit and see how it works.
Unfortunatly the main flow on most of these tractors is back through the 3PH lift valve and directly into the resovoir. This leaves no place to easilly plumb in a return line filter on the LP side of the valve.
