Farmhand seals again

SVcummins · Mar 24, 2022

Had a helper come over today to help reseal the cylinder. What is the viscosity of the aftermarket hydraulic oils ? I sent a letter to harvest king they never wrote back my guess is that no one there has an answer ? Here you can see the agco seals the deeper and thicker verses the Baum hydraulic seals .

fastfarmall · Mar 24, 2022

I think it's like a 10W,I do engine oil analysis that's what my 10W-30 engine oil comes back as, or sometimes a 11.

SVcummins · Mar 24, 2022

Ill have to do a little more research I guess. Maybe I should just send a sample in to test.

SVcummins · Mar 24, 2022

redforlife · Mar 25, 2022

You don't by chance have a moisture (rust) problem on the inside of the cylinder do ya?? Between where the seal is when
down, all the way to the end you pull the ram out of when you take it part? Be like all rusty inside on what should be the dry side of the seal when down.

On the old F-11 loaders, if parked with loader raised up much more than about knee high, the ram end of the cylinder would be upwards from the other end. Rain water would run down the ram and into the cylinder. This would cause rust. Rust would in turn eat the seal out. If this happened, you wouldn't fix it by just replacing the seal. Rust would just eat up the new
seal. About the only way to fix it, would be to hone out the inside of the cylinder when you have it apart.

By the looks of your loader, I kind of doubt you have a rain water problem. But what about a condensation problem in there causing the same thing??

Just a thought, if your puzzled why your seals never hold up.

used red MN · Mar 25, 2022

In my opinion if you think the oil is to thin and finding a thicker hydraulic oil is going to fix you problem you are ..number 1.ing in the wind. If you could run 40w in there; if they are going to leak with hydraulic oil they will leak with the 40w. Now maybe somewhat less but they will still leak. I to wonder what condition the bore of the tube are in. Maybe they are just flat worn to large and the constant diameter changes cause the seal lips to weaken and fail. I also wonder about pitting as was also mentioned.

SVcummins · Mar 25, 2022

Pretty hard to replace piston seals without pulling the rod all the way out . Cylinder bore looks ok but after 60 years Im sure its probably a little wore . Biggest thing that ruins the seals is I thought it would be a good idea to put an 8 foot wide bucket on . It wasnt a good idea at all the first year I tried it in snow I hit a big frozen cinder in the yard it took a big chunk out of the seal looks like Cookie Monster took a bite out of it . Last summer I used the 8 foot bucket to dig a dirt ramp to unload equipment even in first gear at an idle with that big bucket one side dug in way to hard and heard a pop next thing oil was dumping everywhere. Not sure what Ill do with the 8 foot bucket but its not going on the farmhand anymore i can tell you that . I still have the four foot bucket and my du al loader is a lot heavier and better for dirt and gravel loading anyway

SVcummins · Mar 25, 2022

Tried running cheap hydraulic oil in the 3020 once . It wasnt very long until the bell housing started making oil as in a leak and a bad leak switched back to hygard and the leak stopped . I cant afford hygard in this machine because it doesnt take much to blow a seal and next dump five gallon on the ground in 5 seconds .. just need to quit using this loader for dirt work and not use the 8 foot bucket .

coonie minnie · Mar 25, 2022

I'm not seal expert, but the deeper one ( I presume used?) looks pretty scuffed up around the edge for not being in there that long? I'm wondering like others what the inside of the cylinder bore is like???

caterpillar guy · Mar 25, 2022

No idea about cost but can you have the barrels rechromed so the pitting and wear is back to original. Or just replace the cylinders with some different ones with better seals.

SVcummins · Mar 25, 2022

The loader isnt worth that much . These cylinders do fine as long I dont use the big bucket that seems to blow a seal every time and cracks the frame . Have several cracks that need welded right now . Its a good loader for hay and it does ok In dirt to with the little bucket . Eventually like to find another quick mount loader like my du al .

Bob Bancroft · Mar 25, 2022

I could think that those cups were never meant to handle the kind of pressure that the 4020 can develop.

Mike M · Mar 25, 2022

I'm betting that is not enough of a seal to hold back that high of pressure. The ones in the JD158 loader are a VEE type of packing but a large stack of them.

SVcummins · Mar 25, 2022

Farmhand calls these low pressure cylinders there is a high pressure option these are not them

SVcummins · Mar 25, 2022

I have enough roof I could double the seal on piston end as well

SVcummins · Mar 25, 2022

I have a brain storm with a little machine work I can double the seals or even triple them

Tx Jim · Mar 25, 2022

(quoted from post at 07:17:22 03/25/22) Farmhand calls these low pressure cylinders there is a high pressure option these are not them

Sounds as if you answered your cylinder seal failure problem. There's a reason cylinders are classified for low & high pressure systems. A JD 4020 hyd system set at factory 2250 psi definitely is in the high category.

SVcummins · Mar 25, 2022

Ive finally developed the answer with a few easy
modifications I think I can make this thing pretty good

Mike M · Mar 25, 2022

Right there is your problem.

moresmoke · Mar 25, 2022

If thats a 2 way cylinder, find someone with a lathe to make you new pistons with poly pack seals. Its a square poly ring with an oring that sits under it along with a split wear ring on the piston.

Click

redforlife · Mar 25, 2022

Ah. So seals are literally blowing out because of excessive hydraulic pressure you think.

Might also be a few to many horses in the tractor for the loader. Use the smaller bucket if you want. But I'm venturing to guess, the same thing would happen if you per say, accidently ran into a tree stump with the smaller bucket.
Loader's aren't really intended to be used as dozer blades.

cjunrau · Mar 25, 2022

For the cost Of all the oil you lost probably could have bought 2 new cylinders from somewhere and welded the correct ends on or modified the loader to hold a regular cylinder. Thats what I did with my Belarus. 4 he wed cylinder cost me $500 and igg thy has been parked all this winter with loader up in the air and hasnt dropped at all. I hate leaking loaders.

SVcummins · Mar 25, 2022

And these were originally single acting cylinders I had to to do a little re configuration to make them double acting

Tx Jim · Mar 25, 2022

(quoted from post at 16:06:55 03/25/22) And these were originally single acting cylinders I had to to do a little re configuration to make them double acting

Your cylinder piston seals were designed to have pressure applied to cup side but not hold much pressure on opposite side.

SVcummins · Mar 25, 2022

I think to much pressure and too big of a bucket because when it gets a shock load it blows the seals every time . Like I say just need to use the heavier loader to play in the dirt and rock as far and digging . This is what happened last time I hit a frozen rock in the yard .

SVcummins · Mar 25, 2022

I have this one set at 2500 psig

Farmhand seals again

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Well-known Member

Similar threads