Add on FEL piping? Valve type?

[freedomlives]

And I've read on an older thread in this forum someone stating that if there is no Power Beyond port, that the 3pt can be fed from the Tank port of the valves.

 

[SSdoxie]

I'll take a "wild guess" as to why the Poles plumbed it in this manner.
1. The relief valve for the tractor is located in the Priority valve and most likely is lower setting than what the loader would need to work at responsible capacity. Route the flow from the pump to loader valve first with high relief setting. There is no power beyond in the loader valve (count the number of hoses) so all flow is sent back into steel tube line going back to the steering priority valve. What I noticed in photo is the size of tube line compared to steel tube line fitting on end of the hose. It appears the original lines are 1/2" but hose fittings are 3/8". That amounts to about 8.5% reduction in flow to the the tractor hydraulics for steering and 3 point.
2. The sluggish, weak steering could be combination of the reduced flow and relief pressure of the steering itself. The weight of the loader is going to apply more ground pressure to front wheels thus requiring more pressure to steer.

Try putting loader in Float, so no loader weight is on front axle, then try steering setting still at various engine RPM. If it works fine with no loader weight raise the loader and repeat test.

 

[freedomlives]

In float it was a bit easier to turn. Lifting the wheels off the ground with the FEL and the power steering really shined.

The hydraulic hoses are actually 5/16", so less than 3/8!

I'm going to get a service manual for the TS3510. UK company has two options, just wrote them to see which is better. Perhaps there is some adjustment needed to the power steering.

 

[LD1]

N is sometimes a designator for power beyond. But most all valves require a certain adapter plug to work right. It's not just a matter of adding a fitting there.

3ph should never be ran off a tank line. It has to do with the internal workings of the valve casting. Tank passages are the outtermost parts of the castings. And there are rubber seals that seal where the spools protrude from the casting that seal that tank passage. These seals, and the casting isn't designed for pressure.

And running a 3ph off the tank line, you will see whatever pressure the 3ph sees in this area. Might not be much with lighter implements, but heavier ones....and bouncing on rough ground....

Best case scenario is blown spool/case seals. Worst case is you crack or blow apart a casting and get.a face full of oil

 

[freedomlives]

Could that be a possible reason why one of the valves apparently leaks? It is the one that controls the bucket tilt, and is bad enough that with the tractor running, driving with the bucket even empty, I have to occasionally pull back on that lever to keep the bucket tilted up. When I park it, if I leave the FEL arms up, and the bucket tilted up, the arms stay up-- even for days-- but the bucket tilts down.

Today I'll try contacting the manufacturer of the valve and see if they still support it, it is a European company. I don't know what is involved with replacing seals in spool valves, but I suppose that and getting whatever piece to enable power beyond will be cheaper than buying a new one.

I want to change the hydraulic fluid anyway, as it has ISO 46 now, but the Iseki manual calls for ISO 32.

 

[LD1]

Could that be a possible reason why one of the valves apparently leaks? It is the one that controls the bucket tilt, and is bad enough that with the tractor running, driving with the bucket even empty, I have to occasionally pull back on that lever to keep the bucket tilted up. When I park it, if I leave the FEL arms up, and the bucket tilted up, the arms stay up-- even for days-- but the bucket tilts down.

Today I'll try contacting the manufacturer of the valve and see if they still support it, it is a European company. I don't know what is involved with replacing seals in spool valves, but I suppose that and getting whatever piece to enable power beyond will be cheaper than buying a new one.

I want to change the hydraulic fluid anyway, as it has ISO 46 now, but the Iseki manual calls for ISO 32.

No. Lack of PB wont cause a bucket drift. Its the tank line that vents to atmosphere when the seals leak by.....IE: leaking outside the valve and creating a puddle on the floor.

Your bucket drifting is either leaking past the cylinder seals (would need a cylinder rebuild), or the valve spool leaking by between A and B work ports. ANd there is no "seal" in the valve to change for that. Its simply a very closely machined fit.

 

[freedomlives]

I guess then the easiest way to figure it out would be to swap the lines from the bucket tilt cylinders to one of the other valves, and see if the problem still occurs.

 

[LD1]

I guess then the easiest way to figure it out would be to swap the lines from the bucket tilt cylinders to one of the other valves, and see if the problem still occurs.

Problem will occur.....it wont magically fix itself just swapping lines.

What it will do is tell you weather the valve or the cylinders are the culpreit.

If you swap lift and curl hoses.....and the problem still stays with curl.....its the cylinders.
If the curl becomes good after the swap but the lift starts bleeding down....its the valve.

Its a bit easier to test/isolate this stuff if the loader has quick couplers

 

[SSdoxie]

easiest, simplest way to determine if by-pass is in cylinder or valve is to set bucket flat on the ground the disconnect the 2 work port hose to the tilt and cap end of the hose or if there quick disconnects on the hoses disconnect them then raise the loader arms and let it set to see if it still drifts. If still drifts one or both cylinder seals are by-passing.

Swapping hoses to lift circuit may not prove anything because that spool also has machined clearances between spool and body.

 

[KB7722]

N is sometimes a designator for power beyond. But most all valves require a certain adapter plug to work right. It's not just a matter of adding a fitting there.

3ph should never be ran off a tank line. It has to do with the internal workings of the valve casting. Tank passages are the outtermost parts of the castings. And there are rubber seals that seal where the spools protrude from the casting that seal that tank passage. These seals, and the casting isn't designed for pressure.

And running a 3ph off the tank line, you will see whatever pressure the 3ph sees in this area. Might not be much with lighter implements, but heavier ones....and bouncing on rough ground....

Best case scenario is blown spool/case seals. Worst case is you crack or blow apart a casting and get.a face full of oil

You are right. There is no guarantee that the tank port was designed to have back pressure on it. Because its connect to tank its a low pressure port. If you plumb the 3pt from tank port, you'll apply high pressure to the port and could crack it. Internals at this port my be damaged by high pressure as well. You may get away with it on some valves but not every valve. I wouldn't do it.