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post #5491 of 5522 Old 11-07-2019, 12:27 PM
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Re: My latest Project - Part Two

Cool stuff this morning and...we got to hear from Mikey!

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post #5492 of 5522 Old 11-07-2019, 02:46 PM
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Re: My latest Project - Part Two

Okay. I see that the problem is clearance for the cylinder due to the length of rod extending from the cylinder when fully retracted.

Shorten the cylinder stroke or install a new and longer rod.

To shorten the stroke, cut 2 pieces of 2x2x3/16 angle to the length needed for clearance, set them around the rod to form a hollow square and weld them together. Then weld the square tube formed to the cross tube. Easy peasy!

Extending the existing rod can also be done, but it involves cross-drilling the cross tube in line with the rod to create a socket for the rod extension.

The alternative is to manufacture the thumb to accommodate the cylinder.

Bob

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post #5493 of 5522 Old 11-07-2019, 04:31 PM
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Re: My latest Project - Part Two

Hey Don. Just wanted to make sure you have the right equipment to weld the thumb:



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post #5494 of 5522 Old 11-07-2019, 06:09 PM
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Re: My latest Project - Part Two

Quote:
Originally Posted by ptsg View Post
Hey Don. Just wanted to make sure you have the right equipment to weld the thumb:

https://www.youtube.com/watch?v=j61ezBX-EyA



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post #5495 of 5522 Old 11-07-2019, 09:54 PM Thread Starter
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Re: My latest Project - Part Two

Quote:
Originally Posted by ptsg View Post
Hey Don. Just wanted to make sure you have the right equipment to weld the thumb:

https://www.youtube.com/watch?v=j61ezBX-EyA




Quote:
Originally Posted by mopar65pa View Post

Ditto


I wanted to see how badly it warped.


What 120 pounds of 1/2"x 8"x 36"steel looks like after the plasma cutter has it's way.









The top piece is for the middle finger.



It didn't sound so nasty until I saw it in writing.


Building the thumb to the cylinder size and the mounting location already in place on the dipper.







Donewrken



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post #5496 of 5522 Old 11-08-2019, 06:23 AM
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Re: My latest Project - Part Two

Wow Don. We are here to help, why are you showing us the middle finger?

Looking good!

Branson F36Rn with homemade hydraulic winch
Homemade backhoe - Kubota D640 engine

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post #5497 of 5522 Old 11-09-2019, 12:55 AM Thread Starter
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Re: My latest Project - Part Two

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Wow Don. We are here to help, why are you showing us the middle finger?

Looking good!



because.







I bent some 1/2" AR400 today and it was the easiest 1/2" plate I have ever bent.
I did heat it briefly with the handy weed torch on both sides to stress relieve it.
Then over to the excavator and slid it through the bucket mounts and did a little curl.

Now to give it a little back bend to fit between the teeth.


It looks like this for now.






Straightened up some, with the middle.




The middle will get false nails.







Cylinder will be here on Monday. So much for two day shipping.

I'm looking for 15" of 45mm 4130 rod for the pin.
One online metal supply offered it for $38 bucks plus shipping but I'll check my local guy first.

I'll just pickup a pair of bushings on the bay, they run about $18 each delivered.


Cost will round off at $280.00 for everything but the couplers and hoses.




Donewrken



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post #5498 of 5522 Old 11-12-2019, 02:30 AM Thread Starter
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Re: My latest Project - Part Two

Thank You !!







For all you've done an do!!


Don




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post #5499 of 5522 Old 11-12-2019, 01:51 PM
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Re: My latest Project - Part Two

Larry and I did all that was required of us and left it with our replacements.

DonF

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post #5500 of 5522 Old 11-12-2019, 03:43 PM Thread Starter
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Larry and I did all that was required of us and left it with our replacements.

DonF








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post #5501 of 5522 Old 11-12-2019, 06:43 PM Thread Starter
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Re: My latest Project - Part Two

The cylinder arrived.
It should work out fine after a bit of surgery and some parts off of a center link.
The excavator is fitted with two hydraulic circuits on the boom.

The one with the quick connects has one inch couplers.

Do you know how much another set would cost??$$$


Fortunately, they are connected to 1/2" lines so I can get by with these.




Which are affordable at two sets for around $30 bucks as opposed to $120 a pair for the one inch.


Breaks over, back to work.


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post #5502 of 5522 Old 11-12-2019, 06:51 PM
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Re: My latest Project - Part Two

On the end of the auxiliary lines, you have a splitter manifold.

The big 1" couplers are for the hammer as it requires One way high flow all the time then you have a plugged port. The port is used by the thumb, you can either attach the hose directly, or get a smaller set of 1/2" couplers.

On that manifold, you'll see a square. That square is used to selected what attachment you're using. Rotate to one side and it's for the hammer, to the other side and it actuates the thumb.

Of course, on the computer, you would also switch between two way (Thumb) and one way (hammer).

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Branson F36Rn with homemade hydraulic winch
Homemade backhoe - Kubota D640 engine

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post #5503 of 5522 Old 11-12-2019, 08:47 PM Thread Starter
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Re: My latest Project - Part Two

Thanks for that.
Your description was spot on.
I'm not sure of the plug on the square block, I'll have to take another look.
I can switch the S1 & S2 from right to left and can also set the limits.
I was just out going through the menus, it's surprising how many items can be set. Alarms can be adjusted for bucket, boom, dipper and a host of others.
It also has an idle down for when you are not using anything that can be set to idle up full throttle for what ever reason.


A lot to learn still but enjoying all of it.


Thanks for the input, will most likely do just as you said now that you said it.




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post #5504 of 5522 Old 11-13-2019, 02:44 AM Thread Starter
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Re: My latest Project - Part Two

Quote:
Originally Posted by ptsg View Post
On the end of the auxiliary lines, you have a splitter manifold.

The big 1" couplers are for the hammer as it requires One way high flow all the time then you have a plugged port. The port is used by the thumb, you can either attach the hose directly, or get a smaller set of 1/2" couplers.

On that manifold, you'll see a square. That square is used to selected what attachment you're using. Rotate to one side and it's for the hammer, to the other side and it actuates the thumb.

Of course, on the computer, you would also switch between two way (Thumb) and one way (hammer).

Attachment 2405819

The plugged port is a hex head plug, should be an easy one to connect to.
I'm going to use 1/2 inch quick connects that will act as a swivel somewhat and keep things from getting all hosed up. Hehehe.



I was actually able to find the top link that I need for the cylinder.
Amazing considering the jungle the garage has become.


Hopefully I can get some time to work on it tomorrow. The pin and bushing are on the way as well as the hoses.
I only needed to buy one SAE fitting and it was only five bucks.
Well, plus a replacement for the stock.


The worst part is I'll have the urge to go out and munch on trees,
or toss a few boulders.



Donewrken



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post #5505 of 5522 Old 11-13-2019, 05:54 AM
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Re: My latest Project - Part Two

Yes the plug is a hex but the square that I'm talking about is the diverter valve to switch between the two outputs. If you put a wrench on it, it should rotate.

Branson F36Rn with homemade hydraulic winch
Homemade backhoe - Kubota D640 engine

Youtube Channel

Pedro
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