Backhoe bucket under warranty?

[moparrob]

And to top it all off, when I went to use the loader today, the darn thing wouldn't start. Fuel pump (electric booster, not injector pump)crapped out on me. It usually made a loud rattling noise when the key is first switched on, but now it makes just an occasional thump. Dealer helped me troubleshoot it over the phone and it started right up when I bypassed the electric pump, but he says he'll order another one for me under warranty. Still waiting to hear from the factory rep about the busted bucket.

 

[LD1]

No backhoe should be capable of breaking the bucket if is factory equipped with in my opinion. I max out my cylinders on a regular basis on all three of my backhoes, it just is part of digging when you hit a rock, root or whatever. Even if the relief valve were misadjusted, the bucket should not fail under full pump output.

To me it would be like your front axle failing when you lift the maximum weight with the FEL. Should not happen. The underlying components should be designed to take the maximum forces the pump is able to put out. Engineering 101 in my opinion. Shame on Mahindra if they take that position. They are a good brand and should stand behind their product.

Read My earlier post in this thread.

USing a backhoe as designed, bno the ucket should not fail. But things get abused every day. And when I say abused, I am not talking about diging and maxing out the hydraulics.

I am talking about using the bucket as a jackhammer to try and bust concrete or something. Side swinging fast and slamming into a tree or pile of dirt. Hooking the bucket under a root that wont budge and bounding the FEL to try to break it loose. Chaining something to the BH attachment and using the tractor to try to pull. ETC. All ways to do permanent damage to the backhoe.

 

[LD1]

Here are some pics...if I can get them to upload...

Looks like the crack along that center tooth has been there awhile. How do you use the machine? What do you dig? Anything that could be called abuse?

 

[moparrob]

In the 24 hours on the meter, Ive used the machine to dig 5 holes to plant 5 gallon trees, two holes to bury a skunk and a raccoon, and when the bucket broke, I was digging a hole for a utility pole. The dirt here is rocky, but when I'd find a rock that wouldn't budge, I'd make the hole bigger until I could scoop it out.

I haven't used the machine for breaking concrete or pounded on anything with the backhoe. I can't see how anything I've done could be considered abuse.

 

[Jabonee]

Looks like the crack along that center tooth has been there awhile.

I was thinking the same thing.

 

[moparrob]

The crack on the center tooth appeared the day before the section broke off. When the crack appeared, I called the dealer right away, and he started the process to get it approved by Mahindra. Meanwhile, these holes won't dig themselves, and the weather isn't getting any drier, so I kept digging. I figured the bucket would be replaced by warranty anyway, but that may not be the case.

 

[Jabonee]

The rust on the center crack makes it look like it had been cracked for awhile.:confused3:

 

[DavesTractor]

No backhoe should be capable of breaking the bucket if is factory equipped with in my opinion. I max out my cylinders on a regular basis on all three of my backhoes, it just is part of digging when you hit a rock, root or whatever. Even if the relief valve were misadjusted, the bucket should not fail under full pump output.

To me it would be like your front axle failing when you lift the maximum weight with the FEL. Should not happen. The underlying components should be designed to take the maximum forces the pump is able to put out. Engineering 101 in my opinion. Shame on Mahindra if they take that position. They are a good brand and should stand behind their product.

Hydraulics 101, the pump provides flow, the pressure comes when we block that flow and ask the oil to do some work, like push a cylinder. A pump on an open center system will make pressure only limited by the pressure relief. If no pressure relief, it will continue to make pressure until a hose or cylinder comes apart, or the pump explodes. A typical CUT has a relief somewhere around 2400 psi +/-. A pump might go to 5000 psi or even more before something breaks. So full pump output, as you mentioned as it relates to pressure, can be huge. The pump is a simple gear pump, and as long as the engine is running it pumps oil, it knows no maximum as far as pressure. But I think I understand your point, so I'm not arguing with you.

Where we see trouble is when an item is not used a designed. I'm not implying the OP is at fault for this failure, not at all. But let me give you an example. If you hook up your box scraper behind a 40 HP tractor and put all the rippers down, you ought to run out of power or traction before a ripper shank tears out a pocket. But if you put just one ripper down and you are cruising along and hit the tip of an iceberg type of rock, you will probably break the shank or tear out the pocket in which the shank anchors before you stall the tractor. And a box scraper manufacturer will not cover that if you fess up to what you did. Similarly, if you get a single bucket tooth on a CUT backhoe firmly secured under a rock and lift max with the boom, and maybe bounce the entire unit a little, you may very well rip off a tooth on a CUT level backhoe. Generally that will not happen on a big machine like a commercial excavator, yet those buckets can be thousands of dollars.

 

[DK35vince]

I have to agree.
I don't think the backhoe should be able to break the bucket like that.
I know I don't think twice about digging/prying a rock out with one tooth and not worry about my bucket breaking like that.

 

[oldpilgrim]

I can maybe understand how a bucket could tear from the cutting edge to the back of the bucket, maybe.

But I can't understand how it could shear off from left to right like it did. I would expect it to bend there not snap off.

Weird.