Adding a spool valve

[Gordy]

See the flow control valve on the loaders frame? I ASSume it is to regulate the flow to the loader


Gordy

[Spike188]

@Eugen As @Gordy pointed out, the twist on this is the flow control vavle to the loader controls. If this tractor has a high gpm pump added, the loader would move to fast. This flow control may be a way to control the loader cylinder speeds. The flow control valve is usualy inline to the TVC for retarding speed for tilling. The ones from Case and Ingersoll were 8GMP flow controls. Princess sometimes had 10GMP valves meaning that the top 20% of the valve sweep would not split the flow enought to make a difference in travel speed. The flow control returns the unwanted flow back to the tank.

Spike

[Eugen]

Don't know if I understand this well, but all that's needed then is a T connection in between the pump and the TCV? What does not make sense to me is that it would return any fluid to the tank. That fluid is not flow controlled. In that case it robs a lot of volume from TCV?

Unless it regulates the flow of both output and return to the tank fluid, then it would work just fine, right? Just trying to understand.

[DavidBarkey]

Don't know if I understand this well, but all that's needed then is a T connection in between the pump and the TCV? What does not make sense to me is that it would return any fluid to the tank. That fluid is not flow controlled. In that case it robs a lot of volume from TCV?

Unless it regulates the flow of both output and return to the tank fluid, then it would work just fine, right? Just trying to understand.

The flow in hydraulics is similar to electrical in the fact that it will take the path of least resistance unless other wise controlled . It must have a pressure complicating flow control valve to split in to 2 channels. These can be fixed equal , offset or variable . They use the pressure created in each channel to push the spool valve opening up side with the most pressure to equalize the flow to preset or adjustable values .
Power beyond valves allow another valve to work as an extension of the first valve . This allows you to have 2-2 channel valves work as if they were 1-4 channel valve .
Best I can put into words . Hope it helps .

Dave

[Spike188]

https://manuals.ccigt.com/OperatorManua ... marked.pdf

Page 6 covers the flow control kit and installation on 2XX and 4XX series tractors.

Spike

[Jancoe]

Finally got a chance to crack open that power beyond from the tcv that I have from a loader. Here is the measurements I took. I need a picture of the guts of the tcv so I can draw up and give you those measurements too.

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[Jancoe]

Here is tcv hole

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[thebuildist]

That's perfect! Thank you!

I think what I'll do is make a PB sleeve like you've so generously measured and then machine a PB port into my extra TCV from a '73 442.

Assuming that works the way I expect, I'll document the process in detail and should be capable at that point to convert standard TCV's into power beyond.

Maybe do it as a favor to friends, or whatever.

And if this current plan for the flow-divider doesn't work the way I expect, I'll just rip out my current TCV, machine it into a PB version, and put that sucker back in there!


Thanks again!

Bob

[Eugen]

I've seen discussions about doing it from time past but as far as I know nobody did it, so I think you'd be the first do actually do it if you do it, @thebuildist

Thank you for sharing that @Jancoe !

[Spike188]

I need to check with Mike from Etobecoke to confirm but remember him saying that the fittings for adding power beyond after drilling the port was available at Princes. I sure that he has converted at least one valve to power beyond.

Spike.