806 Hydraulic woes

Two things:

First. The pump is gonna run in there at around $1200 if memory serves. They don't lend themselves to rebuilding most of the time as the body is made from aluminum.

Second. Forget everything else for a minute: Tell your dad I wanna buy his 966. :>)

Allan

They are one he!! of a tractor; probably why ya never see a decent one for sale. :>)

Allan

Just in a vistin' here.

There is no way that the hitch cylinder rod can scratch the cylinder that I know of, because it is hooked to the piston.

You forgot those old 560's, 400's, etc.; they all had down pressure on the factory hitch 'cause they used an external two-way cylinder.

But, I think you're right about the hydraulics; the first 3gpm is prioritized to the power steering. He says that the light 'flickers' at a very low idle, and everything else is intermittently working "around" that steering.

Therefore, it sure sounds like he is starving for oil to me too.

We then throw in the fact that the pump housing is made of aluminum and this makes it high on the list of things that will go south, given enough time and use.

Hope he posts back as to what he finds to be the culprit.

Allan

My mistake. I should have said "no downpressure on factory three-point hitches", instead of just "hitches". I'm going to have to do some checking, but I'm 99% sure that the cylinder rod on the 06-3088 series just kind of sits in the bottom of the piston.

That's kinda what I was wondering, especially when he said he has to speed it up a touch to get 'er going.

Maybe that pump is just gettin' weak in the knees and he is just running out of pressure? Right on the borderline?

'Bout the only other thing it could be, right?

Allan

As far as the REAL hydraulic issues are concerned, I recall something about an "MCV" multi-control valve that needs to be replaced when this happens. The valve controls all the hydraulic systems on the tractor, including steering, brakes, and TA. I believe this is the unit on the left side of the torque tube, in front of the step there. It's the one that has a little plunger that goes up and down when you move the TA lever.

And this valve is malfunctioning only just at those particular times when he turns a sharp corner? :>)

Heck, I dunno

Allan

Dude, I grew up on 56 and 66 series tractors, which are the exact same design.

The hydraulics on a 806 are totally different than on your favorite 56 & 66 series.

Take a quick peek sometime and you will notice that the tractors are nowhere even close to being the same design.

Well, other than the fact that they both use the same shade of red paint. :>)

But, ya may be right. I sure don't know what's wrong with this fella's tractor and maybe it is that darned valve.

Just the same, I'm still a bettin' he either has a wobbled out pump or has a low fluid level. Seems odd that the valve would first work okay, then not work, work okay, then not work, etc., etc.

It just sounds to me as though he is starving for oil, for whatever the reason.

Allan

Maybe they're different as far as outward appearance, but the 806 has an MCV just like the 56 and 66 series.

Sounds to me like your fluid level is too low; have you tried "overfilling" a gallon or so if it does indeed read 'full'?

That hitch doesn't have any downpressure; sounds completlely normal to me.

Those are my two guesses for this morning, :>)

Allan