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3 Cyl Ford 2000 Hydraulic suction and pressure tube port

K

kltighe

New User
The bottom end of the hydraulic tube assembly has three ports where it fastens to the rear center section. One of those ports appears to have some kind of valve in it that passes from the larger suction tube through to the hydraulic reservoir in the center section. It is nowhere to be found in the service manuals that I can find. Does anyone know what this is? Does it require any maintenance? Thanks!
Kevin
 
The part I was wondering about is inside the lower hydraulic tube flange (the in-between sized port of the three). I believe the release valve Bern mentioned is threaded into the bottom of the center section.
I'm wondering about this because my suction filter/pipe assy, C5NNN994M fell apart. The end cap of the filter was found laying in the bottom of the reservoir. Of course this defeated the purpose of the filter. The filter is thoroughly plugged with crud. It is hard to understand how a filter under negative pressure would blow apart?
 
Do you have a pic you can send of this mystery part? I don't see anything in the parts list. I'm drawing a blank.

Pretty typical for the end of that filter screen to come off, I think the glue holding it on just gives out after several decades. I have re-attached more than one over the years.
 
Sounds like you have the earlier style with both lines integrated into the manifold where it attaches to the rear axle center housing (prior to 10/1/1969). I see the three o-rings in the parts diagram for the that style 2000 and 3000, but it doesn't say what the ports are for that they seal.
 
mvphoto85805.jpg


mvphoto85806.jpg
 
I'm still drawing a blank. Can you send a pic of the mating surface on the rear axle housing, and draw a circle around the area that aligns with the circled item in your pic?

The repair manual shows nothing in that area other than the relief valve.
cvphoto110897.png
 
I think that the circled area in your second picture is just the spot where they drilled to put a dimple in the manifold to permanently affix the suction (larger diameter) tube to the manifold. It needs an o-ring because it's possible for fluid from the suction line to leak out there if there was no o-ring. I'm not sure exactly how they attached the pressure line to the manifold, but I suspect that they brazed it.
 
Interesting. If that spot in the manifold was merely a dimple to secure the tube, they wouldn't have drilled that hole in the casting. It must be a return passage of some sort. Is that a blind hole in the casting, or does it lead somewhere or intersect with another passage? If so, and you could follow it, you'd have your answer. Possibly it's a return passage for the flow control valve? (green arrow).

I'm still not sure what it's for. Hopefully someone else with a 2-3000 can chime in.
cvphoto110905.png
 
(quoted from post at 11:10:52 12/15/21) I'm still drawing a blank. Can you send a pic of the mating surface on the rear axle housing, and draw a circle around the area that aligns with the circled item in your pic?

The repair manual shows nothing in that area other than the relief valve.
<img src=https://www.yesterdaystractors.com/cvphotos/cvphoto110897.png>
Click to expand...

Bern....what manny did you find that hydrol pic. in.??
I been looking for a pic. of that, in all the manuals I have on my 73 3000, (cannot find it anywhere????)
Guess I'll have to buy another manny!!!! LOL!!

I've got the same prob. with my Hydrol hookup at the diffy, only my diffy hookup place is leaking like a sive to the outside, under the right footboard.
OH YAY!!!!
What mine is doing>>>>>>

mvphoto85813.jpg



Gary
:roll:
 
I got the image from a digital copy of the 2000-7000 series manual, part # 40200050. It's page 728 of 990 total if looking at it in Adobe.

Your leak appears to be from the brake cross shaft. Not a big deal unless a loader frame is in the way.
cvphoto110906.png
 
Possibly it's a return passage for the flow control valve? (green arrow).
Click to expand...

Bern,

The 2000 didn't have a flow control valve. The 3000 and 4000 had them but I guess since the 2000 was the bargain basement tractor they left it out.

The 2000 and 3000 used the same hydraulic lines from the pump to the center housing and the early ones with the manifold had the third o-ring in both the 2000 and 3000 models. Interestingly, the 4000 did not. And before anybody jumps on me about the 4000 having the pump in the center housing, the ones with the S-O-S transmissions did not. They had the same engine mounted piston pump as the 2000 and 3000, but the manifold was different at the center housing as it only has 2 o-rings and is smaller and a different shape.
 
I did not know the flow control was left off the 2000 models, not many of those in my area. Either way, if my theory is correct about that hole in the casting, it was likely drilled as a 2-3000 interchangeable housing. You have any other thoughts on that hole?
 
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