Also the loading stresses on the boom pivot, where the ripper attaches. The pivot appears to me to be somewhat small for the forces acting on it, but I imagine the engineers must have worked it out.
That might be a cat attachment, but more likely an aftermarket attachment, There’s companies that make all kinds of different types of buckets, rippers, etc…. For excavators
That thing replaces the bucket AND stick and the ellbow leverage looks like it is boosted too. I hope they did the math for the loading on the boom.... Holy cow they got serious deep, multilayered caliche to need that.
As someone that’s never operated an excavator please elaborate. /edit. Nvm, quick google search. The drive motors are expensive to replace and digging over them causes unnecessary stress on the component, increases the rate of wear and tear, and accelerates the time to replacement. By keeping the drive end away from the work, the force is on the idlers and track where it should be.
@@zaccheus that's the job of the hydraulic and spring loaded idler, the 'tension created by the drive sprocket depends on which direction the machine last moved, either way it's frowned upon to put undue load onto the sprocket.
@mrbluesky2050 where the tension ends up also depends on forces applied to the undercarriage from external sources. This machine is going through thousands of cycles in a day and each cycle is pulling the machine toward the point of ground engagement. If the drives were in the other side of the machine, that would mean the entire track would experience a tension/slack cycle for every dig cycle.
In a soil that appears to be limestone (?) even a hard limestone, I wonder if the price of this Monstrous tooth (!!), the cost of installation and de-installation on the Excavator, the transfer on a trailer ... remains competitive compared to conventional ripping methods ?
Hello, @segomatu7063. Didn't you read this bit in the caption below the video? Quote: "When the caliche is so hard that your D11 can't even get through it ." Unquote. 'Nuff said?????????????????? Just my 0.02. You have a wonderful day. Best wishes. Deas Plant.
Obviously it's all rock, but... I still would not be thrilled if I was that adjacent property owner. "Hey FYI, we're just going to dig a giant 20' deep, straight face pit right on your fence line... K, have a nice day."
Adjacent properly looks commercial, so I'm guessing they probably don't care. My guess is this will have some giant building put in and there may not even be a drop off by the time they are done.
Ram seals on the top ram aren't going to last very long !! Not sure I see the point [no pun intended] in this machine, at least with a dozer you can push material out of the way and have another go. Please tell me am I missing something is there a reason for it, I don't believe that the rock is that hard for a D11 ?
That 154 ton (operating weight) excavator has over 800 HP so big shanks need big power!! Fuel usage would be measured in gallons per hour as well so it's thirsty too.
I one watched explosives being detonated next to the high rise building I was in. The area where the explosives were was covered in old tyres so nothing flew in the air and the sound was just a thump. Probably a couple of hundred square meters of rocks was broken up in the blast. So explosives do get used in towns and cities.
@@roblogie1742 Exactly. I live in Central Ontario on the Canadian Shield rock. Not much gets buried underground here that doesn’t involve blasting the granite. Not at all unusual to hear three hits on an air horn (standard pre-detonation warning) followed by a big thud or two. Normal life here.
