Blew hydro line for bucket curl for the 2nd time now...WTH....

976 Views 9 Replies 8 Participants Last post by Old Machinist, Jul 30, 2021

VirtualGreen

Discussion Starter · Jul 6, 2021

Winter before last I blew the right hand side hydro line on my H180 loader (for pushing out the piston) while the bucket was curled down and I was trying to scrape snow.

Fast forward to this weeked, I borrow the neighbor's stump bucket, which is about 40" long and I try my luck at digging stumps. About 10 minutes into my first stump, BANG, and a wind shield full of Hyguard (liquid gold) drips down in front of me. Blew the same line again!

So it seems like long buckets, high resistance, and just the righ curl angle will cause a hose to blow.

I thought there was supposed to be pressure release safeties to prevent this from happening?

This is going to be kind of a useless machine if I'm going to be blowing hydro lines every time I put a little stress on the curl cylinder.

Is this happening to anyone else?

To add insult to inury, this happened at 4pm Saturday, just as all the stores closed for the long weekend, so my big expensive machine was rendered useless by a $70 hose. Of course, none of the local auto parts stores open today had the right fittings in inventory. Hard to imaging this right angle fitting that's been used by Deere for 20+ years on their loaders, and no one had any.

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Kennyd

· #2 · Jul 6, 2021

When the valve is in neutral, all safeties (the pressure relief valve) is out of the circuit because it's on the other side of the valve. There are no "work port" relief valves on these are any other tractors to may knowledge.

When you have a long bucket like a 40" stumper, you are dramatically increasing leverage on the cylinders and loader itself, which can impose a lot more pressure spikes in the hydro systems.

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ddinham

· #3 · Jul 6, 2021

I have blown hoses twice on my H180 loader. Neither time was force being applied.

Sent from my Samsung Note using Tapatalk Pro

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thatguy2

· #4 · Jul 6, 2021

I blew a curl hose on my 3038e once. Luckily we have a place in town that all they do is make hoses. The guy looked at the JD factory hose, declared them cheap garbage, and in 15 min and $25 lighter I was headed home.

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JDJake

· #5 · Jul 7, 2021

Specifications of the loader?

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hosspuller

· #6 · Jul 7, 2021 (Edited)

Better to blow the hose than bend the cylinder rods. H180 loader on a compact tractor is not a construction digger. It's a loader from loose piles.

It would be better to drive the stump bucket forward rather than use it as a pry tool. That way you're shearing roots instead of pulling them apart.

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John 54

· #7 · Jul 7, 2021

Hi All
I have a 1025R I have had a couple of hydraulic hoses rupture one being a power beyond and the other one on the BH I feel the quality of the hoses was lacking. They were single braid' I replaced them with double braid hose with reusable ends and assembled the hoses my self. This happened early in the life of the lines no other lines have failed since.
Regards John

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VirtualGreen

Discussion Starter · #8 · Jul 29, 2021

I tried again, blew another hose...LOL...I give up now! The hoses themselves weren't blowing, but the hoses were blowing out of the fittings. This last time I didn't have much of angle, to try and reduce leverage. It was mostly straight, but still blew when I drove forward, so I wasn't prying on it.

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ddinham

· #9 · Jul 29, 2021

VirtualGreen said:
I tried again, blew another hose...LOL...I give up now! The hoses themselves weren't blowing, but the hoses were blowing out of the fittings. This last time I didn't have much of angle, to try and reduce leverage. It was mostly straight, but still blew when I drove forward, so I wasn't prying on it.

I can see I was a little misleading on my previous post. I blew hoses twice and I said force was not being applied. That is not exactly correct. What I meant was that hydraulic force was not being applied. Both times it was external force that blew the hoses. Under those circumstances, something has to give, better the hose than the cylinder.

Dave

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Old Machinist

· #10 · Jul 30, 2021

I can't find the link now but Messicks did a video once on how different actions applied to a loader increased the line pressure.

Knock on wood I haven't blown any lines on my 420 loader rebuild but I don't use it for much other than lifting and the occasional grading operation.

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