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.