FEL Cylinder Leaking

TBDonnelly · Mar 25, 2009

Diamondpilot said:
You will find some good tips like heating the seals to soften them in hot hydro fluid.

Chris

Thanks for the tips. This is my first cylinder rebuild so any help is appreciated.

Don

kennyd · Mar 25, 2009

Hydro fluid not necessary, I just boil them in water on the stove for about 5 minutes.

Wayne County Hose · Mar 26, 2009

I wouldn't boil them. These polyurethane seals are rated for 212 degrees. I heat them to about 160 degrees and that's plenty. I doubt your seals got hot enough to do that type of damage. Especially all the way out on the FEL. If it got hot enough to do this damage out there, you have way bigger problems than this. They were extruded because of pressure, not temperature. I will bet you are doing things with that bucket that you shouldn't be doing.

You absolutely do not want to get seals from Kioti. Ask Rick Wallace about that. It's not the dealers making a killing on them, it's Kioti. Rick makes almost nothing on a seal kit just to try to keep customers happy. I can get a seal kit for a Kioti for maybe $20. Kioti will charge over $200 for the same exact kit.

Don, sorry I couldn't chime in earlier. I closed my shop and went back to work. Now the shop is busy again and I'm trying to work full time too. I'll sleep when I'm dead.
Andy

TBDonnelly · Mar 26, 2009

Wayne County Hose said:
I wouldn't boil them. These polyurethane seals are rated for 212 degrees. I heat them to about 160 degrees and that's plenty. I doubt your seals got hot enough to do that type of damage. Especially all the way out on the FEL. If it got hot enough to do this damage out there, you have way bigger problems than this. They were extruded because of pressure, not temperature. I will bet you are doing things with that bucket that you shouldn't be doing.

Don, sorry I couldn't chime in earlier. I closed my shop and went back to work. Now the shop is busy again and I'm trying to work full time too. I'll sleep when I'm dead.
Andy

Andy, I'm sorry to hear about the closing of your shop. Recently, I helped my cousin go through closing her family run business of many years and it's been like a death in the family.

Your comments are interesting about excess pressure. My previous tractor was a frame size smaller, a Ford 1220, I had it for 8 years and put 600 hours on the tractor. Never had a cylinder problem with the Ford FEL. With the Kioti, I moved up a frame size and the loader is spec'd out almost double what the Ford 1220 was spec'd out at. I'm doing the same basic yard tasks with the Kioti, with a more comfortable seat

, as I did with the Ford 1220.

So maybe there's something up with the hydraulic system itself? Could the pressure relief valve not be working? Doesn't the pressure relief valve safeguard the loader from self destructing?

Don

TBDonnelly · Mar 27, 2009

The new seals arrived. Size and shape look identical, different color(blue). They came from Martin Fluid Power. www.mfpseals.com They have online ordering through their website. 4 seals totaled $10.xx Shipping from Tampa, Fl brought the total to $16.80

Don

TBDonnelly · Mar 27, 2009

I heated the seals in a pan of hydraulic fluid to 160 degrees. The seals were soft and pliable and slipped into position. My question is are they seated properly? The one edge of the seal is tilted. Is this normal or do I need to jockey the seal around so the edge is more flush. See the attached pictures.....

dfkrug · Mar 27, 2009

TBDonnelly said:
My question is are they seated properly?

They do seem to stick out a bit more than I would expect.

MSUC is a metric U-cup piston seal I see. I would have expected that the
profile was more like the MH607 type, but I have not had my cyls apart.

What is the bore size (or wall thickness) of that cyl?

J_J · Mar 27, 2009

TBDonnelly said:
I heated the seals in a pan of hydraulic fluid to 160 degrees. The seals were soft and pliable and slipped into position. My question is are they seated properly? The one edge of the seal is tilted. Is this normal or do I need to jockey the seal around so the edge is more flush. See the attached pictures.....

The seals have to be installed correctly for this reason. Some seals have a lip that needs to go in a certain direction in order to seal. Look at the pictures in the link below. Did you happen to notice the orientation as you removed them? The lip should go against the pressure.

HYDRAULIC PISTON SEALS - Parker

TBDonnelly · Mar 27, 2009

dfkrug said:
MSUC is a metric U-cup piston seal I see. I would have expected that the profile was more like the MH607 type, but I have not had my cyls apart.

What is the bore size (or wall thickness) of that cyl?

I checked the size chart for the MH607 and they are not offered in the size I need(35x45x6.0).

I don't have the right tool to measure the bore size....but I'm working on it.

Don

TBDonnelly · Mar 27, 2009

J_J said:
The seals have to be installed correctly for this reason. Some seals have a lip that needs to go in a certain direction in order to seal. Look at the pictures in the link below. Did you happen to notice the orientation as you removed them? The lip should go against the pressure.

HYDRAULIC PISTON SEALS - Parker

I believe I have the seals orientated correctly. It's wether I need to twist the 'U' shape so the bottom of the 'U' is seated up against the white telflon spacer, which may bring the protuding lip down a bit. Although, The way the seal sits in its current position it does appear both lips/edges would make contact with the cylinder.

Don