stump speech

[jake98]

Remind me again....what was the purpose of PULLING these stumps? (those little ones could be ground out in about 10 minutes....or YOU could use your large grapple :laughing: )

What did you do, rob a bank?? That grinder is a beauty. I have the poor man's stump remover.

 

[SPYDERLK]

I'm wondering about the actual forces involved now. If I could do it with single chain on each end it would make it alot simpler. I need a way to set the pressure to the chain strength to avoid breaking expensive chain. I guess the gauge and the throttle will do it.

Breaking strength of GR 70 chain is 4 times the work load limit. This is there because most working loads involve inertia and acceleration/unintentional jerking. Your load does not. I would not hesitate to go to 2.5 the WLL of the chain for your type of application. Actual chain stretch will happen above 3 and then youve damaged the chain, but not necessarily weakened it any ... just less stretch available to absorb jerk energy. Watch out for hook problems. The chain is stronger than the hooks.

Does the cyl have 14T pull force ... or is that its push force?
larry

 

[SPYDERLK]

that was just so I could use single chain, but after feeling how tight they were I was glad there were two of them on there. Don't have much experience snapping chains but I bet 1/2" grade 70 isn't where I want to start.
As for getting the trees to lean I'm going back and forth between trying to yank the stump halfway, or using a lever to increase my draw length, and going with like four 1" ropes up high. I know what you mean about 'almost' getting it to lean the right way. One is going to be tough. I'll save that one for last.

You cannot break or even come close to stretching a 1/2" Gr70 chain with 14T force. Breaking strength of that chain is 45,200 pounds.
larry

 

[jake98]

Thanks Larry, I've been wondering about that. The pull calculates to 29,158 if my pump goes to 2700lbs., so I guess I'm at close to 3x WLL on the (single) chain. Gotta check the hooks I ordered again, I think those are chineese.
edit. the hooks say they're rated the same, 11,300.

 

[jake98]

Looks like I'm gonna have to rent a POD to store these things.

 

[jake98]

I think I'm gonna call this the final system. The straps allow me to move it, (they're a little long, but I had them), and I can set it on the next stump for storage. I picked up a couple grab hooks for adjustments, only one used here on a short piece of chain, gonna put one on the other end tomorrow.

 

[newbury]

With Bore, stroke, rod all the same is there any advantage of a tie rod cylinder over a welded?
thanks

 

[jake98]

They seemed to be cheaper with tie-rods. I got mine from the surplus page on Baileys. I was thinking of getting a four footer but now I don't think it would have made a difference, I need to pull them from both directions and then they're ready to go.

 

[beppington]

Have you had any "surprise" pulls yet where the smaller stump stayed & the bigger one came out?

I ask just because I've been surprised both ways when pushing over lives trees recently. Sometimes ones much bigger than I thought would go over, do go over; And sometimes smaller ones I think will be a piece of cake break off instead of the root ball coming up & out. The ones that break off are very disappointing. :laughing:

 

[jake98]

Have you had any "surprise" pulls yet where the smaller stump stayed & the bigger one came out?

I ask just because I've been surprised both ways when pushing over lives trees recently. Sometimes ones much bigger than I thought would go over, do go over; And sometimes smaller ones I think will be a piece of cake break off instead of the root ball coming up & out. The ones that break off are very disappointing. :laughing:

I keep wondering about that, but so far the smaller ones were the ones that went. It looks strange when you pull from the opposite side, the second time. One moved about a foot sideways before it started tipping. Had to rub my eyes..

 

[Bedlam]

Sounds like its going to be well worth the investment. Im surprised no one else had done this before. Really have me to wondering now... Great job

 

[newbury]

Sounds like its going to be well worth the investment. Im surprised no one else had done this before. Really have me to wondering now... Great job

Been done before, Hillbilly stump puller VERY effective but with the chances of snapping chains etc. you almost need a Fermi type winch or a D8 for real safety. But then if you are smart enough to run a chainsaw you can probably do it safely.

/edit -
Note that the "hillbilly" uses 2 cylinders and even then it's got limited pull.

 

[J_J]

With Bore, stroke, rod all the same is there any advantage of a tie rod cylinder over a welded?
thanks

A welded cyl has fewer parts to break. Supposed to be stronger. Pressure rating is usually higher for the welded cyl.

 

[jake98]

Been done before, Hillbilly stump puller VERY effective but with the chances of snapping chains etc. you almost need a Fermi type winch or a D8 for real safety. But then if you are smart enough to run a chainsaw you can probably do it safely.

/edit -
Note that the "hillbilly" uses 2 cylinders and even then it's got limited pull.

And here I thought I had an origional idea.
I suppose since hydraulics was discovered people have been pushing and pulling stuff with it.
That post points out that if you break a chain, the link that breaks shoots out at a 90 degree angle, something to think about there..

 

[J_J]

jake98,

Congratulations on your Hydraulic stump puller build.

Original or not, you proved that it could and will work. You will also probably find other things to do with it.

 

[beppington]

Could I do what Jake's doing, even though I have no rear remotes?

Meaning, could I use say my FEL's valve's curl/ uncurl function to power that powerful cylinder he's using?

(I know very little about hydraulics; if yes to the above this would still allow me to raise/ lower my FEL, just not curl/ uncurl)

 

[newbury]

Could I do what Jake's doing, even though I have no rear remotes?

Meaning, could I use say my FEL's valve's curl/ uncurl function to power that powerful cylinder he's using?

(I know very little about hydraulics; if yes to the above this would still allow me to raise/ lower my FEL, just not curl/ uncurl)

Until someone else chimes in - I'm pretty sure you can, you've got the size. After Christmas I'm PLANNING on trying it with my B7610. As was suggested to me over on the Kubota O/O forum.

 

[J_J]

Yes you can. You can install QD's on the curl circuit, and just plug in what you want to use. You could also install a diverter valve, to switch between the curl and the stump puller cylinder.

You would still have lift.

 

[beppington]

Yes you can. You can install QD's on the curl circuit, and just plug in what you want to use. You could also install a diverter valve, to switch between the curl and the stump puller cylinder.

You would still have lift.

Woe, now that would be where it's at! Can you recommend one?!