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Re: No Hydraulic Action

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Tall T

08-07-2014 19:35:54

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Thanks men!

GOOD NEWS from your resident worry wort.

I just went out to start it up again and the hydraulics are performing perfectly now, so obviously it primed itself.

Royse, I went out and looked for a bleed spot just as you were writing that probably but don't see one. I was thinking I might just have to disconnect the line where it enters the pump and draw from there till I had solid fluid.

I respectfully disagree about the addition of the hydraulic filter and service guage being a monster in the making. I'm betting I have a pretty clean sump. :D
But thanks for the great idea Zane about filling the filter!!

Thanks for coming to the rescue!

I hadn't actually looked at my restored emblem up front till a minute ago, as the tractor was nose to the wall when I removed and reinstalled it.

This post was edited by Tall T at 19:38:27 08/07/14.

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Ultradog MN

08-08-2014 04:38:32

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 Re: No Hydraulic Action in reply to Tall T, 08-07-2014 19:35:54  
Lot of those tractors ran for a lot of years and millions of hours without any filtration at all.
So I would say it's not crucial.
Yours wont hurt anything for sure but Zane is correct. And it is more exposed stuff to get hit and more places to leak or lose prime.
Ford didn't filter the hyd oil untill 1976. On the 26/3600 tractors they went to a gear pump which had the filter right on it.

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Tall T

08-08-2014 08:39:03

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 Re: No Hydraulic Action in reply to Ultradog MN, 08-08-2014 04:38:32  
That's a beauty; a pump with a filter mount.

I like it!

I'm in no way going to imply that every tractor should have one

just because I happen to.

My tractor came this way is all.

I see what you mean about the hazards of the filter hitting something depending on the uses the tractor is put to. There would have to be some kind of protective guard around it in some cases I suppose.

I searched a WIX catalogue in the Hydraulic section and found every number surrounding mine but not mine exactly. so yesterday when ordering some 15W40 Amsoil for a friend, I ordered another Wix Hydraulic but they had to cross the number to a Donaldson.

I'm going to have to do some dub-checking.

As you know, when you simply follow what someone has done or installed before, you are sometimes blindly assuming they had it right. At first I crossed the Kralinator number to the WIX I just put on.

So maybe my filter housing is so old, that the number ceased to be listed in some catalogues. Wix 51259


Gatemouth Graham 8)


Vane pump article including pitfalls of suction side filtration!!
This post was edited by Tall T at 08:57:53 08/08/14.

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08-08-2014 09:37:06

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 Re: No Hydraulic Action in reply to Tall T, 08-08-2014 08:39:03  
Quoting Removed, click Modern View to see

Filtration is great but pump starvation is not.
The chances of the filter hitting something are slim. The chances of ripping off the underside hydraulic lines on an NAA is orders of magnitude greater - dozens of documented cases of that.

Modern hydraulic systems use a strainer on the suction side and a filter on the return side. I'd strongly suggest using a Zinga AE-100 or equivalent wire mesh spin-on element in place of that paper element. You might have to replace the head to get it to fit but a Zinga AEF head is cheaper that a typical filter.


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08-08-2014 04:33:18

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 Re: No Hydraulic Action in reply to Tall T, 08-07-2014 19:35:54  
One of the greatest enemys of the hydraulic systems on these Ford tractors is any restriction in the suction side of the hydraulics. The pump is prone to draw in air at the shaft seal and the more the restriction the more air. These pumps won't pump air. It just lets the air pulse and no oil will flow. Even when Ford did put a filter in the later tractors it was in the dump side of the system and under pressure. Not on the suction side.


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Tall T

08-08-2014 08:26:36

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 Re: No Hydraulic Action in reply to ZANE, 08-08-2014 04:33:18  
Thanks Zane . . . filter on the pressure side sounds good.

I don't know yet but I am thinking that hydraulic filters may actually be "designed" for the suction side as well and as such would be less restrictive with a possibly less fine filter medium

and lower pressure relief to facilitate by-passing, for when the filter medium is saturated.

Now to put the new gage on the filter mount to see what it tells me.

I forget where I saved this from:

"The OMT range of filters fits into return lines of hydraulic circuits (pressure up to 20 bar), suction lines and medium/high pressure lines (100/420bar).

Depending on the models, they can be equipped with accessories like differential clogging indicators (visual and electric), pressure gauges, pressure switches, by pass valves etc."

So here's something to ponder.

Suppose some people had just measured the filter gasket and put any spin on there that would fit. Any restricted flow would then be attributed to the filter system itself and such systems would then get a bad rap.



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