TYM 574 power beyond rear remote w/backhoe

[Balazar]

It's irrelevant because the remotes are connected before the 3 pt valve. Also, the speed control knob, only affects the speed the 3pt lowers, nothing else in the hydraulic system. It will still let it raise at full speed and, when rotated all the way in, won't let the 3 pt drop.

I had reduced flow to my backhoe. It could barely lift it's own dipper arm. The dealer told me to lower the 3pt arms all the way and unscrew the speed control knob all the way. This immediately fixed the problem. Why did this work?

 

[ptsg]

I had reduced flow to my backhoe. It could barely lift it's own dipper arm. The dealer told me to lower the 3pt arms all the way and unscrew the speed control knob all the way. This immediately fixed the problem. Why did this work?

I can't see how is that even possible since the 3 pt valve is the last one in the circuit and technically is not even in the circuit when the remotes are feeding the backhoe.

Here is the circuit diagram. Aux valve are the remotes and Main control V/V is the 3 pt valve.

Most hydraulic circuits in these tractors go as follow: Pump > loader valve > remotes > 3 pt valve.

 

[jigs_n_fixtures]

It's irrelevant because the remotes are connected before the 3 pt valve. Also, the speed control knob, only affects the speed the 3pt lowers, nothing else in the hydraulic system. It will still let it raise at full speed and, when rotated all the way in, won't let the 3 pt drop.

The flow is from the power beyond on the loader valve, to the rear remotes and then to the transmission and internal three-point valving. The return flow from the rear remotes to the tank, flows through the 3-point valving to return to the reservoir, so I'd guess the settings on the three-point might influence the return flow resistance, and thus the overall flow through the rear remote valves. Not sure because my TYMs don't have backhoes, and I've never thought about it before now. I might have to look in the manual and see if they have a hydraulic flow schematic.

 

[ptsg]

The flow is from the power beyond on the loader valve, to the rear remotes and then to the transmission and internal three-point valving. The return flow from the rear remotes to the tank, flows through the 3-point valving to return to the reservoir, so I'd guess the settings on the three-point might influence the return flow resistance, and thus the overall flow through the rear remote valves. Not sure because my TYMs don't have backhoes, and I've never thought about it before now. I might have to look in the manual and see if they have a hydraulic flow schematic.

The return flow from the rear remotes dumps straight to the transmission. It has to and there can't be any resistance on the return flow. The power beyond from the remotes feed the 3 pt hitch. If the remotes are being actuated (ie: powering a backhoe), the fluid then goes to the backhoe and dumps to the tank/transmission, so there is no fluid going to the 3 pt valve.

It won't even work and that's why there is also loads of posts asking why the 3 pt doesn't work and the fix is to put that detent remote back in neutral.

Then there is the drop rate control knob, which is located between the 3 pt valve and the 3 pt cylinder. It can't affect anything else on the hydraulic circuit.

That's why I can't see how that would fix Balazar's issue. Unless it was some sort of coincidence that he messed with the settings in the 3 pt and during that time he pushed the remote lever further or something and ended up fixing the issue that way.

 

[Dlindsey]

Sorry, I found this post trying to understand why my tractor is not operating as it should be. And as the people responding to this seem to have a decent understanding of the hydraulic system maybe you could help me as I’ve called the dealer and other dealers and no one seems to know why this is happening.

I have a RK 55. I guess that would be a TYM 574 equivalent not sure.

The three-point hitch will not lift unless the a lover is in the forward or back detent position. If the a and b l levers are in the neutral position than the three-point hitch will not lift. Nothing happens.

Also, if I plug something in the a remote, whether that be a push or pull line, even if the lever is in the neutral position, it will push the hydroxy cylinder, depending on which line I plug-in. Nothing happens when I move the lever doesn’t bleed off or engage it.

I purchased the tractor this way thank you

 

[Torvy]

I'm not a hydraulics expert, so I'll leave that part to them, other than to say both A and B should be in Neutral.

The RK55 is a T554. Same frame, iirc, but the engine is a Yanmar, not a TYM (kukje).

 

[K5lwq]

Sorry, I found this post trying to understand why my tractor is not operating as it should be. And as the people responding to this seem to have a decent understanding of the hydraulic system maybe you could help me as I’ve called the dealer and other dealers and no one seems to know why this is happening.

I have a RK 55. I guess that would be a TYM 574 equivalent not sure.

The three-point hitch will not lift unless the a lover is in the forward or back detent position. If the a and b l levers are in the neutral position than the three-point hitch will not lift. Nothing happens.

Also, if I plug something in the a remote, whether that be a push or pull line, even if the lever is in the neutral position, it will push the hydroxy cylinder, depending on which line I plug-in. Nothing happens when I move the lever doesn’t bleed off or engage it.

I purchased the tractor this way thank you

It probably would be better to start a new thread with your question so that in the future people with similar issues might find it beneficial.

That said, for some reason your A remote is not in the neutral position when the lever is in the neutral position. At least that’s what it sounds like. So that remote valve is redirecting fluid to the remote ports but the ports are blocked with nothing attached. This makes the fluid flow through the pressure relief valve and robing the fluid to the rest of the system. Running the tractor with this happening for prolonged periods of time will cause damage to your hydraulic system.

I would look closely at that remote valve linkage to determine what is going on.

 

[Dlindsey]

I drop this off at the Rural King shop. They replace the back remotes and told me everything is functioning as it should be either run it all the way forward or all the way back. The same exact thing is happening and the fluid is getting so hot that the rear end has steam coming off of it and my loader function Will go out at times. Their lead mobile tech told me this is normal and most people just wear gloves eye roll.

Can anyone tell me if it’s good for the tractor to run the backhoe and the three-point hitch at the same time?

 

[ptsg]

That's not correct and will damage the hydraulic pumps over time.

Running it like that, is forcing all the fluid at max pressure through the relief valve. This causes heat and a lot of wear and tear, when done for long periods of time.

The remotes should be in the neutral/middle position at all times, unless you're actually using the remotes, either to power a backhoe or a toplink.