Drooping TO-35 3-Point part 2

[Anonymous-0]

Well, we drained the hydraulic and transmission sections, and found LOTS of crud in the bottom and sides of the case. Lots of diesel fuel and paper towels to the rescue!
Since we took off the 3-point lift, we pulled the 3-point cylinder and piston.
Wow, the piston and rings are really scored. There are a couple of score marks in the cylinder as well, but nothing like the piston. I'm guessing I should replace the piston and rings, but the question is how "bad" can the cylinder wall be without replacing it? I don't know if you can even get a replacement (2-1/2" dia.).
Also, the O-rings on the hydraulic tube and between the hydraulic 3-point cylinder and top case were squished flat! So, we're replacing them as well.
Is it worth while to replace the 2,000 psi pressure relief value while I'm in there?
Finally, is there a retrofit kit for a filter on the inlet to the hydraulic pump? I'm hoping the pump isn't as bad as the 3-point piston--that will have to wait for another year.
Thanks!

 

[Jeff-oh]

The Pump in the TO-35 I believe is the same as the F-40 and MF-65 pump. The early pumps did not have a filter but later versions of the pump did. Thus, I do not think you can get a retro fit filter but if you do have to replace the pump (I do not believe this is the case) then you could look for one that did have the filter.

Jeff

 

[John (UK)]

The "O" rings leaking should have shown up when you looked inside, they will normally go flat, but as long as they don't leak they are OK. You can't get a filter to convert the early Pump. You can get a 2-1/2" Cylinder and Piston & Rings. Hone the Cylinder before you fit new rings or they will not bed-in properly. Take care removing the old rings as they are VERY sharp. The cylinder should not have any deep grooves, when you have honed it completely and there are only thin grooves it will be OK, there is always some leakage here which is a good thing, as long as it is only dripping and not running it is fine. It is always better to change the Safety Valve while you can get to it easily, especially if it hasn't been changed for some time.The crud in the Hydraulic and transmission is because the oil hasn't been changed as recommended, every 12 months or 750 hours..John

 

[Anonymous-0]

John (UK) & Jeff (OH):
Thanks for your replies. I'm going to try not replacing the cylinder at this time. Hopefully my old brake cylinder hone will work on this cylinder as well. I guess I'll try calling the YT office, as they don't list the 2-1/2" piston or rings on this website. The only thing I can find (here) is the gasket (in sets of five for some reason) and the 2,000psi pressure relief valve.

 

[John (UK)]

They do have them on this site, look under MF35, they are listed, rings too. They are the same as the TO35....John