steal line rupture

[Egon]

txdon;

With the comments many others have made I'd suggest talking to dealer and thinking about some line replacement. For sure the one that was brazed.

Egon

 

[Youare]

At 6000 psi it is a good thing there is a shield over that line where it broke. You could have gotten a good shot of oil in the face.

I would be thinking of repalcing all the steel lines if there is any chance they all my have the same weakness at the seems

Randy

 

[JimR]

The picture is decieving. The line just looks pitted in the picture.

 

[txdon]

<font color="blue"> "...pushing forward with the bucket down will add many thousands of pounds of pressure to the hydraulic system." - RaT</font>

It seem that Rat might have come up with the best explanation of why the line broke. I don't know for sure but the ingredients seem to have been there. I was moving forward and alternating between tilting and lifting. My dealer informed me that the relief valve does not operate when the valve is in the neutral position. RaT has measured the PSI increase to 6,000 pounds. I cannot rule this out. I called a large Houston Kubota/New Holland Dealer and they have sold a lot of loaders like mine and the service manager reported only having replaced one steel line - and that was on a three year old New Holland loader. My dealer checked his parts usage list and only one line with the part number of my line was replaced.

Like RaT the Houston Dealer also remembered several years ago a recall of some hydraulic hoses but no steel lines.

I guess a truly accurate study would include all loaders on the grand Ls and all four part numbers (each line). However I have not seen this problem here on TBN so I feel OK about the integrity of the lines. But I'm still not standing in a raised bucket.

Egon, my dealer is sending me a new line free. I have good dealer support! /forums/images/graemlins/smile.gif

 

[Egon]

Good show Don. /forums/images/graemlins/grin.gif

Egon

 

[dlgmt]

My L3130 w/723 loader did the exact same thing this past July, it sounded like a 22 cal. rifle when the line split. I am thankful that guard was in place. I removed the line and took it to the dealer he agreed that it looked like it split on the seam, he ordered a new one and covered it under warranty being the tractor/loader was only four months old at that time.

 

[txdon]

dlgmt, What were you doing with the FEL at the time? Were you also moving? Was the joystick in the neutral position for the line that broke?

I think I know what I did and I am operating the FEL differently now. I make sure the bucket tilt is engaged when I try to tilt up and drive forward. That is the only way the relief valve will work, otherwise the pressure put on the cylinders is trapped in the lines and continues to increase as I drive forward.

 

[dlgmt]

txdon, I had just installed my tooth bar that a.m. and was trying it out by moving and leveling some dirt around my pond. I did have the bucket tilted forward and was moving foward when the teeth on the bar caught a stump that was just below grade. I guess the spike in line pressure between the cylinders and the control valve caused the line to fail @ the weak point(seam).

 

[txdon]

dlgmt, I had my tooth bar on also and was under stubborn brush roots moving forward. It looks like the suspected diagnosis has been verified. Thanks, and thanks RaT for sharing your pressure measurements on the hydraulic line.

 

[billycalexander]

I own a Grand L 3430 about 2 years old now and the exact same thing happened to me . I'll have to look to remeber which line it was but it ruptured in the same area under the shield.