Blown Hydraulic Line

jinman · Oct 4, 2002

I think I smell smoke... Sounds to me like your dealer just doesn't have a good answer and is not willing to admit it. If your "buzzing" line goes away when you use your loader hard again, let us know. I've never heard of that and you seemed to indicate it has happened several times. /w3tcompact/icons/hmm.gif I got my busted hose replaced yesterday. My dealer told me the 16LA loader's warranty was only one year, so I had to pay for my hose, but they made me a hose out of 4000 psi hose, so it should hold up better than the OEM one (2500 psi, I think). It was only $15.

bgott · Oct 4, 2002

I asked them if it was under warranty and they said yes, I'll be just a little upset if they try to tell me the loader is only a year. I bought the tractor as a package with a two year, 2000 hour warranty. I asked the secretary for a reciept and she told me she was going to mail it, I hope that wasn't a dodge. I checked the fluid before I started using the tractor today and, of course, I had to add a couple of gallons of fluid. Then I went out and ran the piss out of it. No leaks and I didn't blow another line yet. I smashed the exhaust pipe on a tree I ran over, y'all thing I should try to get that warrantied? /w3tcompact/icons/grin.gif

jinman · Oct 5, 2002

I have so many blackjack and postoak trees that I know I couldn't keep a vertical stack exhaust pipe on my tractor. Heck, I was mowing last weekend and caught the top 2 inches of my ROPS on a power pole guywire. YIKES!/w3tcompact/icons/shocked.gif I have a hard enough time watching what's in front of me...much less behind me./w3tcompact/icons/blush.gif

knucklehead · Oct 5, 2002

Warantee the exhaust? I'd ask just to see the look on their faces. I'd also recommend you wear a helmet /w3tcompact/icons/grin.gif. Ditto on the glad you're O.K. Guess we're just supposed to order them with turf tires and a belly mower for around the house, and carry wood chips in the bucket for the rose garden, according to the dealer??

I was thinking about guards on the piping that crosses on the front to keep it from getting damaged in the woods, but now I'm thinking of guards to keep ME from getting damaged in the woods. Got a chafed hose here and there, too. No wise cracks....I already thought of that, you bad boys.

Anonymous Poster · Oct 6, 2002

Hi everyone,

SteveV seems to think Hydraulic fluid is colored blue for some reason... /w3tcompact/icons/grin.gif

I think hazmat is getting a little ahead of himself here. This being a blue dicussion, you can discount what orange has to say but.... 

But we all know it is really orange, now don't we? /w3tcompact/icons/laugh.gif

SteveV made as very good point, that may have been passed over a bit in this thread. I don't know if all loader hydraulics are the same, but IF the pressure relief valve is on the pump side of the loader control valve, where it makes sense that it would be, then, if you were pushing on something with your loader bucket, while the control valve was centered, then there would be no pressure relief valve in the picture, and the pressure withing the loader hydraulics would be indipendent of the tractor's hydraulic system and could go VERY high.

Boy, that turned into a long sentence! /w3tcompact/icons/shocked.gif

In smaller bits:

If Loader control valve is centered...

Then there is no PRV in the picture...

Loader system Hyd. pressure is what forces on the loader make it become...

Push real hard against a tree with the tractor and loader hyd pressure can go VERY high.

POP goes the tubing/hose/whatever

Suddenly I'm not seeing orange and blue anymore, but only black and white!

Not sure whose fault it should be though if I pop something while pushing...seems like the tubing/hyd system should be designed to handle such things...

Bill in Pgh, PA

knucklehead · Oct 6, 2002

So how come more of us don't burst hydraulic hoses or lines when digging? I would think it was a matter of design.

This whole thing brings up an interest of mine - is there any good quick n' dirty info on hydraulics available? I have picked up a little here and there from reading. Guess I should do my own search, but being lazy, and knowing the vast knowledge here, I thought I'd ask. What I want is a good rule of thumb and common sense understanding of hydraulic design (think woodsplitter) and operation. Stuff like the filter goes on the suction side (or pressure side) because of blah blah, and you need a XX gallon reservoir for every gallon of pump capacity. And the relief valve isn't in the picture when the valve is centered (what's a closed centered vs open valve, anyway? One that holds pressure vs allowing flow through when centered?)

You know what I want: Sufficient knowledge to reduce the fear quotient and therefore allow the user to enter into dangerous territory, completely confident.

/w3tcompact/icons/grin.gif

Anonymous Poster · Oct 6, 2002

Hi,

Knucklehead asks:

So how come more of us don't burst hydraulic hoses or lines when digging? I would think it was a matter of design...

Most don't blow out hoses or tubing whatever we do...so I guess the safety factor designed into the tractor's hydraulic systems must be adequate.

I never really thought about it...but when using the loader and say, scraping the soil, and hitting a rock that doesn't move...I suppose the hydraulics could experience a pretty good pressure spike. During normal digging, the maximum pressure felt by the system would be the pressure that the pressure relieve valve operates at, I would expect.

Anyone know what the PSI rating of the tubing used on our loaders is, as compared to the rating of the hoses? Is it likely that the tubing would be the weak link in the system? IF not, then the split tubing could only be a warranty issue, and the dealer should have no way to claim that it was split due to actions of the operator.

That's the way it I see it for what little that's worth.../w3tcompact/icons/smile.gif

Bill in Pgh, PA

hazmat · Oct 7, 2002

I think hazmat is getting a little ahead of himself here.

I assumed that he was using the hydraulics on the loader when the line broke. We all know what happens when we assume /w3tcompact/icons/blush.gif/w3tcompact/icons/blush.gif

Thanks for setting the record straight.

knucklehead · Oct 8, 2002

Haz - for what it's worth, you're in good company....speaking personally /w3tcompact/icons/blush.gif/w3tcompact/icons/blush.gif. That's one of the things I like about TBN.

Volp · Oct 26, 2002

knucklehead, you can find information on hydraulics in an earlier thread
http://www.adtdl.army.mil/cgi-bin/atdl.dll/fm/5-499/toc.htm
This is also a useful link to more information <A target="_blank" HREF=http://www.insidersecretstohydraulics.com/>http://www.insidersecretstohydraulics.com/</A>