Bucket curl problem ?

[TrippleT]

MrJimi, I am wondering if you have a piston seal leak? That lets the fluid pass by the seals in the cylinders. If so, you would have to take the cylinder apart and put in new seals. The reason I wonder is that you said that you did have a large load on it. What ever it is I hope that it isn't hard or costly to fix.

Do you have a manual that shows the hydraulic system schematic? If so you might be able to determine what you have so far as seals internally.

At any rate good luck to you sir.

 

[MrJimi]

TrippleT I need all the luck I can get, I do hear a hissing sound in the valve area and we did not see any visible leaks but I think I Will be learning how to move my skid steer without fluid? = next thread ?
and the problem only happens when I curl bucket up and not down, it will go down some before it goes up and its real easy to tell with my ten and a half foot boom pole sticking out like It's on viagra or something, It's a 4 inch pipe, pictures in my gallery LOL
yes I have a manual, 22 miles away from me now

 

[john_bud]

MrJimi,

The load check is usually physically between the two outlets that go to the cylinder. Should be accessable externally. However, some are only accessed once the valve is taken apart. I'm 70-80% leaning to externally accessable as you probably have a mono-body valve and not a stack valve. The load check is a spring pressure device that keeps the valve from moving until there is enough pressure to overcome the load's weight. Usually a metal cylinder or a ball.

It could be some general gunk that was floating around, metal or a bit of hose even a chunk of o-ring. It's more a big deal to get started than it is to fix it.

The hissing sounds like the relief valve is partially open. May also be from a piece of gunk. The relief valve is exterally accessable and unscrews. It is nearly always located next to the "IN" port. If you take it apart, count the EXACT number of turns it takes as the system pressure is set with it. A smart person would double check with a gauge - a lucky person will just count and be close enough. As Clint said, "Are you feeling lucky?". Gunk is possibly from the same source flooding your system with a big load of gunk when a component failed. Sixteen years isn't that long for hoses and o-rings, but is about right for cylinder seals to start loosing their composure. They are both physically stressed from rubbing as well as from holding back the pressure. When the go, they GO. So, don't be surprised if you have a bad cylinder needing re-sealing (or all of them soon....)

I have had good luck with H&D out of Dallas. Fast shipping and low prices across the board. You know, some higher but mostly lower than competitors. They also have a very good downloadable (10 meg) catalog. I DL'ed it while on dial up - it's worth the wait. Has pictures of all the components!

H&D Distributors, Inc. Your Complete Source for Seals

You asked how the gunk got where it causes damage when you have filters and screens. Picture it. If a cylinder seal failed and lots of particles are in the oil in the cylinder, when you move the cylinder the oil goes out of the cylinder down the hose to the valve. If the check operates or the relief operates that dirty oil is right there. The filters are way far away and only catch gunk heading into the reservoir. You have clean filtered oil going INTO the valve, but dirty particle filled oil leaving it when a failure at a cylinder occurs.

jb

 

[MrJimi]

I've been thinking about this since I've had this problem and it will turn in to a big mess, I have to raise my bucket arms to get at this valve, my arms go up about 12 feet? my space where skid steer is normally has 8 foot head room, I have to clear out another spot in building where I have 16 feet of height to do this=yuk, lots of rearranging to do=yuk, this will take me sometime to do all of this and I am expecting to run in to more unexpected problems, we always do=yuk.
This sounds like taking a Iron pipe apart under house to fix a leak with lots of trips to the plumbing store. And this sounds like a problem I had with cholesterol back in 1995, my lines were getting clogged with junk food, that is all fixed now with a change in eating and some over the counter vitamins a big thanks to the VA
Keep all the great replies coming, it is 22 miles from here and I'm only there on weekends=yuk again
I will be ordering some hydraulic catalogs in the morning. One place I have ordered from is
Burden Sales Surplus Center - Hydraulics, Engines, Electrical and More
and I will be getting another from
H&D Distributors, Inc. Your Complete Source for Seals
and I hope they have a seal kits for my valves
And yes, I will post pictures with this fun project and they will be small files and links for my dial up buddies
The cholesterol part was easy, I hope this won't take as long
Jim

 

[RonMar]

If you have to have the loader arms in the air to access the valve, you MUST have a structure strong enough to support the loaders weight BEFOR you start messing with any fittings on the valve. You crack open the wrong fitting and that loader is going to come down all by itself in a rapid fashion with no way to control it... Be safe.

 

[MrJimi]

If you have to have the loader arms in the air to access the valve, you MUST have a structure strong enough to support the loaders weight BEFORE you start messing with any fittings on the valve. You crack open the wrong fitting and that loader is going to come down all by itself in a rapid fashion with no way to control it... Be safe.

My Case has a locking bar to hold up the arms from the factory, it's a heavy piece of steel that just swings down to work on it kinda like the opposite of a hood rod and my overhead is all trusses, 16 feet up. I may have some pictures in my gallery
and I will be sure to relieve all pressure before I do anything
Thanks for the heads up

 

[MrJimi]

I've been thinking and I probably did this when I over stressed it and a piece of thrash got stuck in the valve. I wonder if I were to stress it again if it would open up and let it go through to the filter? It makes sense to me but I don't know anything about hydraulics
It does sound real easy
what are your thoughts

 

[TrippleT]

MrJimi, I reread some of your posts and it does seem like someway there is fluid by-passing.
I would check it where the noise is. However, that is no guarantee that it will be right there. Noises can travel. Again good luck and DO be careful there.

 

[MrJimi]

The hissing sound I hear comes from the general area where the valve is?
I will try to stress it this weekend and see what happens
wish me luck, I'm hoping it will open valve and pass it, that sounded funny
The back tires of my 6,500 pound machine came off ground and it has a 3,500 tipping load and a 1,750 lift
strong unit

 

[MrJimi]

Well, that idea did not work at all, I did receive my Surpluscenter.com catalog and now I can measure hoses to be replaced and I also want to get an in-line pressure gage like J_J installed on his Power Trac
I still have to clear a big area in my shop for this