Mr

[whiterose]

Hi Folks.

I'm a new member Sept 2nd 2015.

I have a 20 year old Kubota B 6100 tractor.
There is a leak on one of the hydraulic cylinders on its Dual Loader 145 front loader.
I am wondering if the cylinder can be re-sealed. Or are they welded up and can only be replaced?

If a cylinder is taken off what do I do about the oil in the system?
Will it all leak out? Or not drip out because there is no pressure applied.

A procedure would be most helpful.

Thanks.

D

 

[Tig]

Welcome to TBN.
I've not taken my cylinders apart, but I'm sure a hydraulic shop could tell you at a glance what it takes to rebuild a cylinder.
I've had a couple occasions to open up my hydraulics for modification and repairs. As you mentioned, there is no pressure. But, if you move a cylinder there will be a corresponding movement of fluid as I observed while dealing with a broken loader hose last winter. Other than that, gravity will determine how much leaks out. Raise the open end of the hose up and secure it. Don't move a thing until the cylinder is replaced and the system closed.
Good luck!

 

[dieselknudt]

If you could attach a pic of the cylinder near where the rod comes out we could tell.
It is pretty rare that they would weld a cylinder shut. I think that it will be repairable.

 

[Walt 2002]

Welcome,

Walt Conner

 

[whiterose]

Welcome to TBN.
I've not taken my cylinders apart, but I'm sure a hydraulic shop could tell you at a glance what it takes to rebuild a cylinder.
I've had a couple occasions to open up my hydraulics for modification and repairs. As you mentioned, there is no pressure. But, if you move a cylinder there will be a corresponding movement of fluid as I observed while dealing with a broken loader hose last winter. Other than that, gravity will determine how much leaks out. Raise the open end of the hose up and secure it. Don't move a thing until the cylinder is replaced and the system closed.
Good luck!

OK Steve. Thanks your prompt reply.

Reading through more material it looks like there is a repair seal kit available so you was right.
The cylinder is not the tractor's but the Daul lift 145 loader's.

I know so little about the tractor and loader. I can't even locate where the hydraulic filler is! On the tractor anyway and not sure about the loader. Is one system tied to the other and there will be just one fill place?
The lift up the lose end and keep tied up and move nothing makes good sense Steve.

Dennis.

 

[whiterose]

Thanks H your reply.

here is a pic- hopefully!

It is a cylinder for lift on the loader.

Dennis

 

[KubotainNH]

Welcome to TBN. I assume you have an aftermarket loader because the OEM one runs off the hydraulic pump attached to the motor. If you look at your picture you can see a metal covered rectangular block between the cylinder and loader arm (on the frame of the tractor itself). OEM style has a plate that attaches to that block with 2 hoses coming out to go to the loader controller. You'll have to follow your return feed from the FEL hydraulic valve back to whatever holds the fluid. I assume you have a pump either attached to the PTO on the rear or to the front of the engine. A couple zoomed out pictures may help find the reservoir.

 

[Tig]

KNH has you on the right track.
Do you have a hydrostatic transmission? B6100HST? If so, the hydrostatic pump may also power the hydraulics. Replenish through the oil port which is just to the left of the dipstick. Both of these are on top of the tranny, in front of the seat.
Here's what it looks like on the HST.

 

[GPintheMitten]

Even if it is not hydrostatic drive, the loader hydraulic's could be plumbed to the tractor 3pt hydraulic lift.

Mounted to the side of the engine, there should be a hydraulic block that can be tapped into to run external hydraulic's like loaders.

Agree, follow the lines to and from the loader valve to determine if there is an external pump or not.

 

[whiterose]

KNH has you on the right track.
Do you have a hydrostatic transmission? B6100HST? If so, the hydrostatic pump may also power the hydraulics. Replenish through the oil port which is just to the left of the dipstick. Both of these are on top of the tranny, in front of the seat.
Here's what it looks like on the HST.
View attachment 439687

Apologies to everyone. I want to reply to all but am getting lost with the system.
Made a reply but could not send pictures.
So will try here.

Looks like there is only one oil filler that is for the transmission but presumably also is the fill for hydraulics. And the separate Woods Dual 145 is on this system too.

 

[KubotainNH]

Even if it is not hydrostatic drive, the loader hydraulic's could be plumbed to the tractor 3pt hydraulic lift.

Mounted to the side of the engine, there should be a hydraulic block that can be tapped into to run external hydraulic's like loaders.

I don't think so, you can see the block that the B6100 normally uses in the picture Dennis posted and it is closed off. The OEM setup has hoses threaded into it like this: http://www.tractorbynet.com/forums/...d1136338671-b6100-picture-800627-dscf0066-jpg. He also mentions a "Daul lift 145" loader so I would guess it's aftermarket, possibly Woods. Messicks lists this for Woods/Dual 145- 145 Loader | Messick's. It's possible it runs off the valve under the seat, no clue if it is HST and somehow uses that.

 

[KubotainNH]

I should have waited a couple more mins for the new pics, timing. So I was wrong, you can see that it is plumbed into that block it just goes in vertically so didn't show on the other picture. Yes this uses the tractors hydraulics and you fill it where you have the screwdriver pointing. The dip stick is on the other side of the shifter, you can add it there too but way smaller hole.

 

[whiterose]

Apologies to everyone. I want to reply to all but am getting lost with the system.
Made a reply but could not send pictures.
So will try here.

Looks like there is only one oil filler thatView attachment 439717View attachment 439718View attachment 439719View attachment 439720View attachment 439721View attachment 439722View attachment 439723View attachment 439724View attachment 439725 is for the transmission but presumably also is the fill for hydraulics. And the separate Woods Dual 145 is on this system too.

Don't think its hydrostatic drive, driven hydraulically is it?
Just normal 3 cylinder diesel and gearboxes.
Does look as if all hydraulics are coming from the system that hydraulically operates the 3 point system. Even the Woods, aftermarket, model Dual 145 seems to be coupled to the above system.

Dennis.

 

[whiterose]

Ok Mike- great.
A bit confused though about the dipstick comment.
Is that not just for the engine oil and separate from the hydraulics?

Dennis.

 

[GPintheMitten]

There is a dip stick for the engine and a different dip stick for hydraulic oil. Don't try to fill via a dipstick. That would be silly.

You have gear driven not hydrostatic driven transmission.

The 3 point lift is powered by hydraulic's. That is the same hydraulic's that the previous owner tapped into for your loader via the hydraulic block.

So after you get the cylinder repaired or replaced, check the level of the hydraulic oil using the hydraulic oil dipstick. Then add hydraulic oil if necessary via the oil fill opening that your screwdriver points to in the pic.

 

[whiterose]

Great. That is very clear.
Thank you all so much- most helpful.

Dennis.