Unloading an excavator

a_lopa · 16th February 2008, 02:41 AM

Interesting..... YouTube - Amazing unloading excavator

Ekka · 16th February 2008, 03:31 PM

Hope the back axel is real strong ... got to give it to them though, good driving.

Therrin · 17th February 2008, 02:45 AM

Wow! Hey whatever work's right?

This is interesting, as I actually spent 6 hrs today operating a Massey Ferguson rear excavator rig. Had almost reached sundown and snapped a double-ended pivote pin bar... snapped clean in two places just below the eyelets.

Had hit a LARGE rock, undergrade, couldn't see from the operating position, and the piece snapped clean, too much torque I suppose....didn't even feel it building up, just went. T'was the "left" side bar which controlled "open/close" on the bucket... left my bucket dangling, had to leave it in far "out" and "up" to get it back to the site without dragging while coming down off the mountain.
Got back to the building, grabbed a sledge hammer and a can of WD40, some wrenches, got the pin-bolts out, slammed the two pins out, and got the assembly apart from the hydraulic ram. Looks like I'm gonna stick weld it tomororw morning cuz I have to finish trenching the job tomorow.

So much for just doing Arb work.

Therrin · 17th February 2008, 02:59 AM

\

Notice it snapped jagged in two spots, simultaneously. You can see the running weld from where it was fixed last time. Hopefully this morning's weld will hold as well. Was thinking about running welds laterally to build some strength up. The "right" sided bar is triple eyelet, and hasn't had any trouble yet. Go figure. This "left" side bar used to be a triple, but apparently last time the excavator snapped it, they couldn't find the third eyelet under the grade and just welded it as a dual-eyelet bar.

This is the piece that the rearward ram pushes on to open/close the bucket.

Quintrex · 17th February 2008, 02:36 PM

Looks like it's time to make a new link bar to me.

JayD · 17th February 2008, 02:58 PM

A nice clean break! It looks to me as the geometry of this connecting rod is not right,It allso appears to be a cast steel? The break on the left looking at the picture has started in the HAZ zone..(Heat Affected Zone) Metals like this need special welding procedures to be followed to be sucessfully repaired.

One has to weigh up the cost to repair compared to re placement,Yes I have reclaimed this type of connector before and had it x-rayed on completion,The part I reclaimed was not available anymore, So it was worth the excercise, but if you could have purchased it off the shelf my sweat would not have paid for it self. Only you can judge that.

I have seen them unload heavy equipment like that before here in Australia,But not to the extreme of wheel standing the truck

.....

coast cutter · 17th February 2008, 07:05 PM

Good driving by the operator. Glad it wasnt my truck though.

osb_mail · 17th February 2008, 07:45 PM

I think if he was really good they would not have needed to pull the truck up .He could have just backed up the excavator.

bigshea13 · 17th February 2008, 08:23 PM

must be theyve never seen a good operator block up the back.

Therrin · 17th February 2008, 08:40 PM

Well it didn't break at the last weld... Still though, I went and saw my fabricator today and as it end's up, I'm gonn have him mill me one out of stock steel. He'll carborize the rounded end pieces for extra strength as well.

6 hrs of fabrication, but it'll be stronger than a replacement piece would be, and slightly cheaper.

16th February 2008, 02:41 AM	#1 (permalink)
a_lopa Over mature heritage tree Join Date: Jan 2007 Location: Drouin Posts: 866	Unloading an excavator Interesting..... YouTube - Amazing unloading excavator __________________ Free Tree Industry Link Directory Drouin tree lopping, land clearing and stump removals

16th February 2008, 03:31 PM	#2 (permalink)
Ekka Eric Frei Administrator - Brisbane L5 (Dip) Hort Cert III Arb + some Join Date: Jan 2007 Location: Brisbane Posts: 6,869	Re: Unloading an excavator Hope the back axel is real strong ... got to give it to them though, good driving. __________________ Remember to use the "search" function, if you have answers/questions post them so everyone can benefit. Free Tree and Green Industry Link Directory Qualified Brisbane Tree Lopping Brisbane Tree Care, Consultations and Arborist Reports Forum Sponsors

17th February 2008, 02:45 AM	#3 (permalink)
Therrin The Tree World Bandit Join Date: Oct 2007 Location: Lancaster, Ca Posts: 1,254	Re: Unloading an excavator Wow! Hey whatever work's right? This is interesting, as I actually spent 6 hrs today operating a Massey Ferguson rear excavator rig. Had almost reached sundown and snapped a double-ended pivote pin bar... snapped clean in two places just below the eyelets. Had hit a LARGE rock, undergrade, couldn't see from the operating position, and the piece snapped clean, too much torque I suppose....didn't even feel it building up, just went. T'was the "left" side bar which controlled "open/close" on the bucket... left my bucket dangling, had to leave it in far "out" and "up" to get it back to the site without dragging while coming down off the mountain. Got back to the building, grabbed a sledge hammer and a can of WD40, some wrenches, got the pin-bolts out, slammed the two pins out, and got the assembly apart from the hydraulic ram. Looks like I'm gonna stick weld it tomororw morning cuz I have to finish trenching the job tomorow. So much for just doing Arb work.

17th February 2008, 02:59 AM	#4 (permalink)
Therrin The Tree World Bandit Join Date: Oct 2007 Location: Lancaster, Ca Posts: 1,254	Re: Unloading an excavator \ Notice it snapped jagged in two spots, simultaneously. You can see the running weld from where it was fixed last time. Hopefully this morning's weld will hold as well. Was thinking about running welds laterally to build some strength up. The "right" sided bar is triple eyelet, and hasn't had any trouble yet. Go figure. This "left" side bar used to be a triple, but apparently last time the excavator snapped it, they couldn't find the third eyelet under the grade and just welded it as a dual-eyelet bar. This is the piece that the rearward ram pushes on to open/close the bucket.

17th February 2008, 02:36 PM	#5 (permalink)
Quintrex Mature tree Join Date: Jun 2007 Location: Sydney Posts: 441	Re: Unloading an excavator Looks like it's time to make a new link bar to me. __________________ Heightmaster

17th February 2008, 02:58 PM	#6 (permalink)
JayD Over mature heritage tree Join Date: Feb 2007 Location: Sydney Posts: 886	Re: Unloading an excavator A nice clean break! It looks to me as the geometry of this connecting rod is not right,It allso appears to be a cast steel? The break on the left looking at the picture has started in the HAZ zone..(Heat Affected Zone) Metals like this need special welding procedures to be followed to be sucessfully repaired. One has to weigh up the cost to repair compared to re placement,Yes I have reclaimed this type of connector before and had it x-rayed on completion,The part I reclaimed was not available anymore, So it was worth the excercise, but if you could have purchased it off the shelf my sweat would not have paid for it self. Only you can judge that. I have seen them unload heavy equipment like that before here in Australia,But not to the extreme of wheel standing the truck..... __________________ Free Tree and Green Industry Link Directory Last edited by JayD : 17th February 2008 at 07:07 PM.

17th February 2008, 07:05 PM	#7 (permalink)
coast cutter Sappling Join Date: Jan 2008 Location: AUSTRALIA Posts: 10	Re: Unloading an excavator Good driving by the operator. Glad it wasnt my truck though.

17th February 2008, 07:45 PM	#8 (permalink)
osb_mail Semi-mature vigorous tree Join Date: Apr 2007 Location: ohio Posts: 203	Re: Unloading an excavator I think if he was really good they would not have needed to pull the truck up .He could have just backed up the excavator.

17th February 2008, 08:23 PM	#9 (permalink)
bigshea13 Mature tree Join Date: Nov 2007 Location: hiding Posts: 386	Re: Unloading an excavator must be theyve never seen a good operator block up the back.

17th February 2008, 08:40 PM	#10 (permalink)
Therrin The Tree World Bandit Join Date: Oct 2007 Location: Lancaster, Ca Posts: 1,254	Re: Unloading an excavator Well it didn't break at the last weld... Still though, I went and saw my fabricator today and as it end's up, I'm gonn have him mill me one out of stock steel. He'll carborize the rounded end pieces for extra strength as well. 6 hrs of fabrication, but it'll be stronger than a replacement piece would be, and slightly cheaper.

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