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Oliver super 77 aftermarket hydraulics

P

popcornob

New User
Hi,

So I purchased a tractor that had the hydraulics and two levers etc... turns out the pump plate is cracked. I was looking at some aftermarket hydraulic setups but can t figure out the details.

I looked at some fan belt driven pumps and the prince pto pump, but I can t find much info on how big of a reservoir it will need or where to put the reservoir. I have an old trip bucket loader that was converted to all double acting hydraulic rams I want to use on it.

Thanks for some ideas!
 
This a link to the page on this site under Oliver 77 parts.
https://www.yesterdaystractors.com/cgi-bin/store/model_parts.cgi?SearchArea=Oliver&&md=77&cat=Hydraulic%20System&r=mcats
 

That looks like a decent front mount pump but I still can t find any specs or info on reservoir size and where people put them.
 

I plan on using the tractor to plow snow and do projects around the cabin. From what I can tell a bigger pump will speed up the hydraulics and not cost a whole lot more than fixing the setup I have now. I intend to remove the old pump and bolt on a plate to seal transmission from the elements.
 
Is there any reason you can't use the transmission case for the hydraulic oil sump like 1960's and later tractors? Modern trans-draulic or hy-tran oils can handle both functions. The transmission would have several gallons of oil capacity and excellent cooling with all the surface area. A check valve in the suction line may be needed if the pump is higher than the oil level.
 
You're gonna find that bolting a plate on there isn't as simple as you think. There has to be a riser for the shift and a carrier bearing for the PTO long shaft. You can probably find the correct plate that goes on in place of the pump,but you'll pay what it'd cost to fix your original pump,never mind the cost of a different hydraulic system.
 
If you are not going to use the PTO pump one of those PTO pumps would be the simple way to go but you'll still have a good amount of $$$$ in it by the time you buy a valve,tank.filter,hoses,etc etc.
 
(quoted from post at 04:14:33 07/15/19) You're gonna find that bolting a plate on there isn't as simple as you think. There has to be a riser for the shift and a carrier bearing for the PTO long shaft. You can probably find the correct plate that goes on in place of the pump,but you'll pay what it'd cost to fix your original pump,never mind the cost of a different hydraulic system.
Click to expand...


I m saying I would fab a piece of 1/8" plate and use the pump housing bolt holes and rtv to delete the pump.
 
i don t see your email under profile. I m looking for a performance gain over the original so probably around 20gpm. Maybe 2000psi.
 
770, 880 series hydraulic systems were only designed for 1000 PSI. Upgrading to a 1960's four digit series or 1970's White might fit you needs better.
 
(quoted from post at 10:33:33 07/15/19) 770, 880 series hydraulic systems were only designed for 1000 PSI. Upgrading to a 1960's four digit series or 1970's White might fit you needs better.
Click to expand...

That s why I am leaning towards aftermarket because the rams have been updated.
 
(quoted from post at 12:10:47 07/15/19) You will need the pto support/bushing if you plan on using the pto after you remove the pump.
Click to expand...
here does the support bushing go on a delete plate?
 
I'm not laughing at anybody,but this kind of thing always reminds me of something Dad did when I was a kid.

He had a New Holland PTO driven side rake that had three wheels. There was two in the back and a caster wheel in front. He blew out the tire on that castor and didn't want to spend the money on a new one. He spent most of the day going through the iron pile and welding up a different hitch to eliminate the caster. When he took the jack out from under it,everything sagged so bad that it was obvious it wasn't going to work.

The air turned blue from the cussing,then he jumped in the truck and shot off to town to get a new tire and fix it right. He wasted an entire day,a bunch of steel and welding rod and still had to spend the money to fix it right. I've got a strong suspicion you'll be in the same boat at the end of the day,getting the original pump fixed and trying to sell all of the new parts you bought on Craigs List for half price.
 
(quoted from post at 05:38:40 07/16/19) I'm not laughing at anybody,but this kind of thing always reminds me of something Dad did when I was a kid.

He had a New Holland PTO driven side rake that had three wheels. There was two in the back and a caster wheel in front. He blew out the tire on that castor and didn't want to spend the money on a new one. He spent most of the day going through the iron pile and welding up a different hitch to eliminate the caster. When he took the jack out from under it,everything sagged so bad that it was obvious it wasn't going to work.

The air turned blue from the cussing,then he jumped in the truck and shot off to town to get a new tire and fix it right. He wasted an entire day,a bunch of steel and welding rod and still had to spend the money to fix it right. I've got a strong suspicion you'll be in the same boat at the end of the day,getting the original pump fixed and trying to sell all of the new parts you bought on Craigs List for half price.
Click to expand...

I know exactly what you are talking about. This situation is that if the pump got replaced the relief valve is also pitted really bad. My thought was instead of throwing a 400$ plate or pump on it I could spend maybe 800 and get more responsive hydraulics, add a 3rd control valve for 3 point or log splitter etc, and enough gpm to add other implements if needed.
 
Same way with motors in garden tractor 30 years and blew up so the owner thinks a different brand motor will be better spends a bunch of $$$ and the different motor never really works like it should as the tractor was designed for the original motor.Lost count of the number of tractors I've bought that were repower projects that were given up on after a pile of $$$$ was spent. .
 
(quoted from post at 11:03:02 07/16/19)
(quoted from post at 05:38:40 07/16/19) I'm not laughing at anybody,but this kind of thing always reminds me of something Dad did when I was a kid.

He had a New Holland PTO driven side rake that had three wheels. There was two in the back and a caster wheel in front. He blew out the tire on that castor and didn't want to spend the money on a new one. He spent most of the day going through the iron pile and welding up a different hitch to eliminate the caster. When he took the jack out from under it,everything sagged so bad that it was obvious it wasn't going to work.

The air turned blue from the cussing,then he jumped in the truck and shot off to town to get a new tire and fix it right. He wasted an entire day,a bunch of steel and welding rod and still had to spend the money to fix it right. I've got a strong suspicion you'll be in the same boat at the end of the day,getting the original pump fixed and trying to sell all of the new parts you bought on Craigs List for half price.
Click to expand...

I know exactly what you are talking about. This situation is that if the pump got replaced the relief valve is also pitted really bad. My thought was instead of throwing a 400$ plate or pump on it I could spend maybe 800 and get more responsive hydraulics, add a 3rd control valve for 3 point or log splitter etc, and enough gpm to add other implements if needed.
Click to expand...

You can put as many valves as you like on the original but your power will still be limited. I have a s88 with a loader. It easily lifts 1200 lbs. so I am plenty happy with the pressure.
 
I've got 2 extra plate-resevoir-2 lever valves for 770's, but only one pump which needs rebuilding. There is a local pump rebuilder at Juda WI who can supply new parts.The reservoir is limiting in capacity.
 
(quoted from post at 08:00:19 07/22/19)
(quoted from post at 10:36:07 07/15/19) I have a 77 and 88 with front mount pumps. The 88 works well.
Click to expand...

Where is the hydraulic reservoir on it?
Click to expand...

The 77 is incorporated into the loader. 88 is under hood over engine. Kinda small and has a hole in hood to fill.
 
(quoted from post at 18:45:36 07/18/19) I've got 2 extra plate-resevoir-2 lever valves for 770's, but only one pump which needs rebuilding. There is a local pump rebuilder at Juda WI who can supply new parts.The reservoir is limiting in capacity.
Click to expand...

Interested. Let me clarify, these are all stock parts? 2 center plates for the pump, the cast reservoir housing, 2 valve levers, and one whole pump that needs rebuild ie seals and bearings?
 
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