Massey 35 valve leaking

Smithe213

New User
Hi there,

I recently aquired a 1952 Massey ferguson tractor, 2wd, gas engine. There is a valve on top of the transmission housing that leaks oil when in a certain position. The valve when pushed in allows flow to the hydraulics that run the FEL. When the valve is pulled to its other position the height of the 3pt hitch can be set but oil leaks out between the sliding potion of the valve and the cast piece. I replaced the o-rings in the valve with the closest ones I could find but the leak is still present. I don't see any scratches in the valve bore.

When looking for this part online to try and source the proper O-rings I didn't have much luck. One manual I stumbled upon called
It a "bypass plate" and it appeared to be just a plate without a valve and a threaded port like mine has. Perhaps it is an aftermarket part that was added with the FEL; not sure.

The 3pt hitch also leaks down when the tractor is or isn't running. Is this a common problem and if so what's the best fix?

Thanks[/img]
 
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No such thing as a 1952 Massey Ferguson. Massey Harris and Ferguson hadn't even merged yet at that time.
 
If that's what is powering your loader it must be dreadfully slow. I don't see a front mounted hydraulic pump so I'm thinking that must be the case.
 
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Looks similar to one like this , used for the Ferguson 735 Loader on the FE35 Grey and Gold Tractors .
They are slow and need a T bar to lock the rear lift into position to work effectively .
The operation is simple and the O rings easy to replace but also easy to tear when installing . Try again with top quality O rings from a bearing or hydraulic supplier . The one I refurbished looked dreadful but won't leak a drop since I fitted new rings .
When not in use cover the exposed portion of the plunger with an oily rag to prevent it corroding .
 
The pump for the 3 point is only around 4.5 gpm, if you want it to work faster you need 12 gpm, or better. A tractor with a loader, and or backhoe the pump will be around 21 gpm, or more.
 
(quoted from post at 13:42:57 05/08/17) The pump for the 3 point is only around 4.5 gpm, if you want it to work faster you need 12 gpm, or better. A tractor with a loader, and or backhoe the pump will be around 21 gpm, or more.

Okay! So thanks for all the help. Looks like it is a ferguson tractor, I was just going by what the ownership papers said. So that's a diverter valve, if I did use a front mount pump could I just cap the port on the valve the loader is currently tied into or should it return to the sump? I assume once that is done I can run in 3pt hitch setting of the valve and just leave it there.

The loader hydraulics are a little slow but the bigger issue for me is the clutch setup. I have read some of these have a 2 stage clutch, I would say this one doesn't. At about 3/4 of the clutch travel the tractor stops moving and the hydraulics won't work again until the clutch is released. I was thinking about a front mount pump for this reason. I'm sure many people have added a front mount pump to these; when doing so do you typically add a hydraulic reservoir to make the system totally separate or plumb the pump suction back to the transmission/hydraulic pump at the back? Also what do people normally run for a pump? Just anything for a fixed displacement pump that runs 12+ GPM at operating RPM? I'm sure I can make a bracket and get one to work with a flex coupler if there is room between the front pulley and rad, I'll have to look later.

Thanks again!
 

I have a concrete counterweight on the tractor now, it is probably heavier than it should be at an estimated 7-800 lbs. with the engine running i take it up to full height, switch the diverter so I can use the loader and within 5-10 minutes the weight is dragging on the ground again. Maybe this is normal for the weight level but it's a little annoying
 
The Ferguson TO35, and the MF 35, 135, 235 are basically the same tractor that got many improvements over the years. With 700-800 lbs hanging off of them the drop is pretty much normal because most 3 point lift cylinders don't seal 100% so it needs constant pressure. The diverter valve is a accessory, from the factory the tractors usually come with a cap like this http://www.yesterdaystractors.com/Massey-Ferguson-135_Cover-Cap_180908M1.html The diverter valve is usually a dealer installed item. It is also not terribly hard to put a front mount hydraulic pump driven off the crankshaft, the pump is usually the most major expense. You may need to replace the front pulley on the engine if the pulley is not made to run a front mount pump. You do have to in-bolt the front axle support assembly from the engine to swap out the front pulley on the engine.
 

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