too much for my backhoe?

[RWolf]

Sounds like it's time for a bigger tractor/backhoe

 

[dirtworksequip]

It's not uncommon for backhoes or even excavators for that matter not to be able to lift a heaped up bucket of wet material with the boom and stick fully extended.

Sincerely, Dirt

 

[AKfish]

Yup, even the big machines won't do some things that we try to make 'em do!

Was playin' around with a friends JD 160 excavator and a 36" clean-out bucket... reached way over to the end of the boom and dipperstick and grabbed a bucket of wet sandy-dirt...

Good thing the bucket was only 12" or so off the ground 'cause the track on the opposite side of the machine was a similar distance in the air...

AKfish

 

[john_bud]

Bigger cylinders just leads to overloading elsewhere, including but not limited to the stability of the tractor.
At some point too much weight extended too far on too small of a tractor becomes a SERIOUS stability issue.
What next, longer stabilizer arms ?
Fatter cylinders all round ?
He is already OVER SPEC on this, single point beef up engineering won't solve the underlying problem.

We don't know the volume of the bucket. That is the spec that counts, not the width alone. You can get a 36" grave bucket that will only hold 4 cuft or a 24" bucket that will hold 10 cuft. Which one stresses a machine more? Once you know the volume they hold, the answer is obvious.

Some times people want to stress out machinery. Maybe he needs to cut a 24" wide trench and wants to do it in 1 pass not 2. We sure don't know from the initial notes he left us. I just gave him the information on the direction and cost to add that stress.

By the way, the underlying problem is that the boom can't lift the load. Solutions possible include:
1) Smaller load - smaller bucket, shallower bucket, lighter bucket
2) Change leverage - move mounting points etc.
3) Increase lifting force - larger cylinder, higher pressure

There may be other issues that solution #3 bring out, but those would be different ancillary problems. Like tipping loads exceeded, structural integrity failures, etc.

Have a nice Thanksgiving holiday.
jb

 

[Reg]

We don't know the volume of the bucket. That is the spec that counts, not the width alone. You can get a 36" grave bucket that will only hold 4 cuft or a 24" bucket that will hold 10 cuft. Which one stresses a machine more? Once you know the volume they hold, the answer is obvious.

Some times people want to stress out machinery. Maybe he needs to cut a 24" wide trench and wants to do it in 1 pass not 2. We sure don't know from the initial notes he left us. I just gave him the information on the direction and cost to add that stress.

By the way, the underlying problem is that the boom can't lift the load. Solutions possible include:
1) Smaller load - smaller bucket, shallower bucket, lighter bucket
2) Change leverage - move mounting points etc.
3) Increase lifting force - larger cylinder, higher pressure

There may be other issues that solution #3 bring out, but those would be different ancillary problems. Like tipping loads exceeded, structural integrity failures, etc.

Have a nice Thanksgiving holiday.
jb

Guess again.
The underlying problem is a lack of understanding that Bradco has done the homework on this.

 

[Brad_Blazer]

A sample calculation - I am totally guessing at the dimensions and weights. A 2" cylinder at 2250psi (7068 lbf) with a centerline passing 9" from the pivot point, an 800lb boom assembly with a center of mass 60" from the pivot point, and a bucket load 96" from the pivot point will have a max payload of 163 lb.

(7068*9-800*60)/96 = 163

Put in the correct numbers and see if it makes sense. Your machine is probably functioning correctly. I think that was the only question.

Brad

 

[AKfish]

Thank the good Lord for engineer's....! Next time my backhoe stalls and goes into bypass; I'm gonna git right off and go plug some numbers in and see if it makes sense!

Just had to say it --- Gawd knows I wouldn't even HAVE a backhoe if it weren't for some "smarty-pants" engineers'.

AKfish

 

[Brad_Blazer]

Just use the calculator before you do this:

I had cylinder seals replaced(boom) because i thought i had a problem, ...

 

[kthompson]

If you want to find out how easy it is to over load a backhoe or any other such machine, just do an internet search on such or you tube. When you are the limits on a machine, there can be the point where it seems a "dime" will make the difference in what it can lift and or be stable. It is much safer not to be able to lift it than to lift it and not be stable. Anytime you are pushing what you are lifting keep that load near the dirt, real near. Can save your life and your machine. Of course the closer you can bring the load in is a plus.

 

[john_bud]

One thing that seems to have been overlooked by some is that the OP has a TYM 330 HST tractor. That machine weighs over 3000 pounds and can take a hoe larger than the one the OP bought. The largest hoe looks to be the BT400 that can go up to a 36" bucket.

The op was not talking about a 6.5' hoe on the typical BX sized machine.