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Hydraulic fitting popped off

Started by PapaPhive, August 15, 2021, 08:55:29 PM

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PapaPhive

Well, just received a brand new grapple bucket for my logs and before I could start moving anything the darn compression fitting popped off and spewed hydraulic fluid all over my windshield. This is my first CTL (Bobcat T190) and first attachment so I am very novice. Is there an easy and fast way to connect this line again, or do I need to take the hose completely off and take it somewhere to be repaired?  I know this shouldn't happen and if it isn't an easy fix, I will certainly reach out to the manufacturer (Good name brand and know they would make it right). I just don't have the time to wait on a replacement. 

Thanks is advance for any advice!

mike_belben

Post a photo of the offending fitting so we can see if its a failed hose crimp or a hardpipe flareless, hardpipe flare etc
Praise The Lord

PapaPhive


PapaPhive

I set it down to get my phone out so there is a bit of dirt in the fitting now, but it was clean. 

tawilson

You need to take it off and take to a hydraulic shop. You better take the other hose too. Looks like they didn't crimp them. Good thing you had your windshield on.
I take it back. Looks like there's a touch of a crimp there. 
Tom
2017 LT40HDG35 WIDE
BMS250 and BMT250 sharpener/setter
Woodmaster 725

PapaPhive

Really, looks like they didn't crimp them?  Wow. Yea, if that is the case maybe I need to reach out to them. Thanks. 

Corley5

Burnt Gunpowder is the Smell Of Freedom

Tacotodd

It looks like a Gates brand, or a least style. They are an "unusual" fitting to crimp that you have to be careful with. In comparison, the Weatherhead that I was taught on is cake and almost impossible to get wrong. The crimping chart is a breeze to follow and get correct. @PapaPhive good luck on however you get the situation to turn out.
Trying harder everyday.

Logger RK

Looks to me the hose wasn't  pushed in all the way before it was crimped

Tacotodd

Quote from: Logger RK on August 16, 2021, 06:31:11 AM
Looks to me the hose wasn't  pushed in all the way before it was crimped


Very good possibility (and highly probable).
Trying harder everyday.

Old Greenhorn

It wasn't too long ago I set up an entire hydraulic hose manufacturing line in the plant I was working at so we could make our own for resale with our products. (we sold about a million dollars in hoses a year.) We used an automated high end crimping machine. Depending on the particular production shop, they do hoses in stages and they will cut a bunch to a particular length then take that batch and push the fittings on, then crimp them as a batch, etc. Different fittings and styles (even sometimes for the same hose size) will require different crimp sizes on the machine. The fitting manufacturer supplies those sizes. Too little and you get a blow off failure, too much and the steel cracks or the pin (center ferrule) will collapse, restricting flow. When the fitting is new (uncrimped) it is smooth on the outside all around (no ribs). These have been crimped, but it appears that it is a light crimp, the ribs are not as sharp and clear as I would expect. They may have had the wrong crimp settings in the machine for that particular fitting or they had the wrong dies in for those settings. Unlikely but it can happen when operators get sloppy or the machine is not so easy to set.
 Take a look at a matching one and see if there is any clearance between to hose outer surface and the fitting inner surface, there should be none and the hose should have a slight neck down where it enters the fitting. Also, if there is a way to identify the manufacturer and the fitting part number you should be able to find the crimp diameter spec for that fitting. This is measured as the final OD of the collar after crimping (not over the ribs, but the smooth OD surfaces) checked about in the middle of it's length or as an average along it's length.
 The manufacturer should be notified (loudly) because this is a serious quality problem that could get somebody really hurt. When I oversaw our line and we had field failures I had the customers overnight the failed hoses in for immediate analysis. Although customers always claimed we sold them defective product so they could get warranty replacement, we only had two failures we attributed to a defect in the hose manufacture process (weak spot in the wall lining) which we followed up with our hose supplier. All the rest were abuse or mis-use. Yes, a hose will fail when you run it over with a forklift or use it as a tow strap or drag a 30# tool on a 50' hose with a UTV through the desert and it catches on some structure and the driver keeps going until he can't. ;D 
 Whatever the cause, they have a serious quality problem that needs immediate remedy. They are also carrying a huge liability and may have other failures out there with more serious results or a sue happy client. This should have been caught in testing, but I guess they are not testing/inspecting their hoses. We tested 100% of our hoses up to 18,000PSI because they were all 8,000 PSI working pressure hoses. Test tanks are expensive and take more time to run than making the hose, but they do catch 99.99% of the rare defects (usually a hose wall failure).
 Good luck, proceed with due caution, check all your other fittings on that thing. Just because they may make it through startup does not mean they won't blow out during use if they were not crimped properly.
Tom Lindtveit, Woodsman Forest Products
Oscar 328 Band Mill, Husky 350, 450, 562, & 372 (Clone), Mule 3010, and too many hand tools. :) Retired and trying to make a living to stay that way.  NYLT Certified.
OK, maybe I'm the woodcutter now.
I work with wood, There is a rumor I might be a woodworker.

mike_belben

someone forgot to push that hose all the way in.. honest mistake it happens.  it shoulda ripped the jacket off and exposed a half inch of wire sleeve if it was in right.. and really it would blow the line before the crimp if it was right.

disclaimer on my insufficient seating diagnosis- if it wasnt a case of mix matching wrong hose to fitting brands, a 2 wire hose with a 4 wire fitting, or insufficient crimp from someone putting the wrong stopper ring in the machine. 

make absolutely certain you have enough slack for full bucket movement, take all your couplers off and bring them back and say fix it.  they almost certainly should jump at the chance to do it over for free.. i doubt youll get any grief or charge but if you do just say hey facebook loves to see this kinda stuff, are you sure you dont want to take this chance to treat me right?

they will likely trim off an inch on an abrasive chopsaw and crimp on new ends.  remind them to make sure they use ends that match the hose size and the number of steel wires.  afterwards blow the lines out with some diesel fuel from a dawn bottle to clear the rubber debris, then put your stuff back together.
Praise The Lord

PapaPhive

The company didn't hesitate to correct it. They also believe it is a short crimp and are sending a new hose overnight. They claimed to have only seen this twice so was reluctant to send a replacement for the other hose, which I understand. If it also fails, we will cross that bridge then. 

Thank you all for your help. Without it, I would have taken it somewhere local to get it fixed and had to pay for it. 

Machinebuilder

If that is a Parker hose and fitting (I see Par**** on the hose), It may have been a couple things.

The hose not inserted all the way, this is my guess, they can be difficult at times. it does look like it was crimped, new the ends are smooth on the outside.

on the Parker crimp machines there is a plate that goes on top of the crimp die, there are 2 different ones , the wrong one might have been used.

the hose is not the same series hose as I use at work, but IF the wrong series hose and end were matched this could happen.

one thing I saw many years ago a certain challenged person tried to crimp the wrong size end on a hose, it was blown apart pretty quickly, and he did it a 2nd time.

Looking at the picture again the frayed look is from when the hose was cut, it looks like their saw needs a new blade.

I'm glad you got it taken care of.
Dave, Woodmizer LT15, Husqvarna 460 and Stihl 180, Bobcat 751, David Brown 770, New Holland TN60A

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