oliver's

cyrus 111 · Apr 7, 2017

hello everyone im new to this tractor world but hoping i can learn a few things, first off im looking for the oliver folks to maybe help me out, i bought a 770 oliver 1966 and the hydraulics hoses had some holes in them so i repaired all the leaks and put hydraulic fluid in it and tried it. worked ok so then i drove it down the road and all it did was foam out the breather cap so i thought i had water in the system so im in the process of draining everything and putting new fluids and filter on, but i cant find a suction pick up screen or anything for the suction side of the pump that i think it should have. any idea's where it might be located would greatly help

Vern · Apr 7, 2017

Scroll down to the oliver-cletrac line on the front page.
Vern

JOCCO · Apr 8, 2017

Look for a poster named RRLUND he is pretty good on them.

cyrus 111 · Apr 8, 2017

thank you

J. Schwiebert · Apr 8, 2017

I will send you an e=mail. There is no screen on the suction side.

rrlund · Apr 8, 2017

He'd better take J.'s word on this one. I've never been deep inside one of those units. Mine always worked so I never had to. Plenty of 4 digits,but they're a different animal.

Alan K · Apr 8, 2017

Our 770 did that once in a while especially if the oil level was a little too full.

rrlund · Apr 8, 2017

The only time I ever had one blow off was on my Super 77. I had a loader on it with one way cylinders. I had to have it right up full to lift all the way and when I'd drop it too fast it would blow the cap right off.

After I wrote that and read it back,it got me wondering if the one in the OP has a plugged breather cap?

cyrus 111 · Apr 8, 2017

is the loader hydraulic seperate from the tractor because it all looks brown milky when i drained it got 9 gallons out of tractor and really nothing out of the reservoir for the loader it all seeped out of the breather till it quit working, put 9 gallons back in tractor and about 1 gallon in loader reservoir with a new filter then added alittle more till it started working the loader up and down and it just seeped back out breather looks really aerated like theres a restriction or really sucking air bad somewhere. working the loader it runs good till it all seeps out the breather, so as good as it works it must be sucking air

cyrus 111 · Apr 8, 2017

i looked at a picture of one and it looks like the hydraulic pump sits down lower of where the reservoir is bolted on, not sure if i have the tractor filled high enough with hydraulic fluid and its sucking air there

rrlund · Apr 9, 2017

OK,hold on. What did you drain? The rear end? That's not the reservoir for the hydraulics. The only reservoir for the hydraulics is right there in that pump housing.
I don't think you mentioned in the original post that you had a loader. Does if have single acting cylinders? If it does,you'll have a devil of a time getting enough oil in it to make the loader work right. With two way cylinders,you're storing more oil in the top end of the cylinders. You might be having the same trouble I had with my Super 77. The oil is coming back in to the reservoir so fast that the breather can't keep up and it blows the filler cap off.

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