Hooking up a remote cyn to 8N

Thanks,

Arne

As others have noted, your only access to the output of the internal pump is via the test port, which you have now found. As others have warned, this is NOT a NPTF (taper) port, but a straight-threaded port. It is, in fact, an SAE J514 Straight Thread O-Ring Boss (ORB) port, and the fitting you need for it is a male -05 fitting - nominal 5/16 and having a 1/2x20TPI thread. These are not as common as some, but they are available. Whatever you buy, it must be steel and rated for at least 2000 psi.

As you have heard, you will need to secure the lift arms in the down position.

Now, because of the way that the valving of the internal pump works, you will not have full control of the output using the stock touch-control lever. If you put it in "up" it will extend your cylinder until it reaches the end of the stroke, and then lift off the pressure relief valve. Your mileage may vary, but it's my opinion that that is an unwise and dangerous way to run for any period of time - the PR valve is a safety device, not a system relief to accomodate other shortcomings.

If you put the hydraulics in draft control mode, you'll have some better control - you can develop the knack of moving the touch control lever to the "neutral" condition once the cylinder has reached the extension you desire, at which point, the pump is shut off and the cylinder line closed, and it will stay where you left it. But this is a sloppy and imprecise way to get an accurtae cut-height setting.

If it were me, I would plumb the pump output to a standard three-way, open center valve, with the return line running eg to a port in one of the inspection covers and the output going to your cylinder. You would then place the stock touch-control lever in the full-up position, so that the pump runs all the time, and control the pump output with your three-way. If you put a shutoff valve in the supply line to your valve, you could close that whenever the mower was not in use, remove the stay bars, and use the TPH in the normal way.

John tOTG has an even better way of doing this, which involves some modifications to the lift cover. Check him out at www.totg.biz

HTH

llater,

llamas

This is not a problem. The cylinder only needs to be an up & down type thing. Mostly used to clear the sickle and when repositioning or moving to another part of the field (short distance). The sickle on a no.5 just rides on a shoe on both ends, no adjustment required other than manually.

Dave, thanks for the tip. Maybe I can add a stablizer to stiffen the draw bar. I already have the mower and not much hay to cut.

Arne

That said, your staybars are not strong enuff to hold down the lift arms.

Don't fully understand your need to use a remote cylinder lift on your JD #5 horsedrawn sicklebar mower converted to 3-pointlift mounted to the 11 hole drawbar. Why can't you use the N's regular hydraulics?..... ...Dell

Which is the test port on the cover plate? You said it is on a corner. Can you describe it?

Thanks,

Arne

You're right, I don't understand what your remote hydraulic cylinder is for. Better explain better.

Most of the time, you use your N's hydraulic lift arms to regulate the height of the cut.

Remember, a lotta and mosta of the N's competition may have had an external hydraulic pump, but only the N had the 3-point hydraulic lift until Fergusons pattents ran out and then all the tractor manufactures jumped on the 3-point bandwaggon. They recogonized a good thing..... ...Dell

I was sort of looking at it last night and didn't really see what looked like a test port, but reading archives see that it is located under my right heel if sitting on tractor. I will look better tonight. I think I have enough info now. Thanks for your help. (AGAIN!!) Thanks also for your patience.

Right now it seems that using the lift with mechanical linkage is the best option.

Arne