Lost thread need help. L175

[Alex from GA]

I've been out of town and lost a thread about a L175 3 point hitch and my registration. My question is the level for the hydralic oil and what kind to put in.
My 3 point hitch won't stay up if I don't keep the lever in the up position. In the hold it falls down. I think my fluid is low as I've never changed it or checked it in the 10 years I've owned the tractor. I removed the round cover, under the seat, and there is rust in there. I changed the O rings a few years ago because it was slowly going down and that cleared that problem. Thanks, Alex.

 

[Stumpy]

I think I replyed to your old thread.

First yes changing the fluid would be a good thing, I guarantee you there is all kinds of water in the sump right now. The fluid level is determined by a level plug, fluid level is correct when fluid just spills out of this port when the tractor is level. I actually just put up pictures (top of post #85) of the 3 drain plugs and the level plug on my L175. You want to put in Universal Tractor Fluid. You can use the Kubota brand stuff (regular UDT is fine or Super UDT2 if you use it a lot in cold weather) or if you're feeling cheap places like Walmart and Tractor Supply sell their brand cheaper. I have doubts about the quality of the Tractor Supply stuff though. If in doubt it's hard to go wrong with the Kubota stuff.

Second your lever problem isn't being caused by low fluid levels. Mine system is dry right now and it stays up just fine. The problem is almost certainly with the spring loaded detent inside the valve, most likely a broken spring. I can scan the diagram of my manual for you later if you'd like.

EDIT: Just read your post again. For some reason I had it in my head you were having problems with the lever itself not remaining in position. My apologies.

Give meanjean's suggestion a try, it may just be that simple.

Did you change all three orings including the piston oring under the cover? A leak down could be caused by a broken oring on the piston or in the valve. I've not taken my valve apart and it only comes as an assembly so there isn't a break down in the parts diagram but that's likely where the problem lies. It will probably come apart. Measure the orings and you can order individual metric orings off ebay or try the closest inch size.

 

[meanjean]

There should be a lever under the seat, it is similar to the one for a garden hose. Give it a spin until the 3pt stays up.
May be that it is backed all the way off.

 

[Alex from GA]

Stumpy, How would I go about taking the valve apart/out? Is it on the lever that raises and lowers the hitch? Yes, I know about the knob on the round thing. Thanks.

 

[Russell King]

Alex - there was a site "failure" and there was some data lost. See the note from Mr. K in the SITE forum (last forum on the list?)

My 3 point hitch won't stay up if I don't keep the lever in the up position. In the hold it falls down.

Would you please clarify your problem? I read it that your actual lift goes down if you don't keep the lever held up so you are (probably) pumping fluid into the cylinder and using the bypass valve constantly (hear a whine/chatter?). It could also be read that the actual lever you move up or down won't stay where you put it so the 3PH also moves down since the control is moving down.

 

[Alex from GA]

Russell, It's the first scenario. It doesn't hold up if I don't hold the lever in the up position. It falls down very quickly. I need to know how to repair it. Thanks.

 

[Stumpy]

The valve is underneath the casting that hold the lift arms and cylinder. You'll need to remove the seat (I think) and the high pressure hydraulic line, disconnect lift arm links (not sure of the right name for them) and it should pop loose. The valve appears to be attached to the underside of the casting. I haven't opened mine so I can't give you specifics on how to open the valve, I suppose it could be sealed but I doubt it. It may not even be the valve but that's where I'd start looking. It could be a leak somewhere between the valve and the cylinder.