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Which mine is this at?
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Fantastic photos  That sloping cab looks weird and cool at the same time. Can you tell us what dump trucks it loads/they use?.
Scania V8. The best sounding truck in the world.
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PS. Noticing the operator in the last pic leaning forward in his seat really puts things into scale! Rowan.
1:25th scale CAT 375L excavator
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Very nice pictures! The size of this shovel will always impress me!
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Thats a nice looking machine although the lime green a little erm .. "Green"
Must have some big pumps to pump enough oil into that stick!
Dont know why they didnt adopt the rack / pinion from the 301 / 351 Marion after the aqusition?
How does the latchless dipper work then? Still have a dutchman hole I imagine.
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Great pics Tim, thanks for sharing these with us! Rossco wrote:Thats a nice looking machine although the lime green a little erm .. "Green"
Must have some big pumps to pump enough oil into that stick!
Dont know why they didnt adopt the rack / pinion from the 301 / 351 Marion after the aqusition?
How does the latchless dipper work then? Still have a dutchman hole I imagine. They are a nice looking machine, no doubt about it...I just hope they run better than their predecessors. They say their design eliminates torsional stresses from corner loading the bucket by allowing the stick to rotate and having the ropes take all the strain of the bucket twisting under load. I say that's a load of crap. The stresses imposed on the front end from the bucket flopping all around more than make up for a little torsional stress. If the little bit of stress is too much for their boom, maybe they need to beef it up. They really should have gone to the Marion rack and pinion, but they used the excuse I mentioned to stay away from it. Rack and pinion is so much more user friendly, and less maintenance intensive than the rope crowd system they used for so long. The hydracrowd is a nice idea, but much more complex than rack and pinion, and as one company found out up here, not too reliable yet. They had availability numbers in the mid 30s as the hydracrowd was always breaking down on them. The latch free dippers don't use a dutchman, latch bar latch boom or anything like that. I honestly think this is a great idea. The system uses a large arm that wraps over the back of the bucket, with a linkage at the top that allows the door to open when a cam bar on top of the bucket is rotated by the trip rope. The knee action of the linkage and bar allows the door to swing open, and when it returns to a closed position, the cam over centers and relocks the arm and linkage to hold the door shut. I wish we could try one and see how it works, but everything would have to be refit or replaced on the bucket assembly, and that's not likely.
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mitchtim wrote:Pictures of the first 495HR2 machine operating in Australia. This is fitted with Hydracrowd and latchless dipper options. Thanks for sharing the photos! Has this machine been in operation long? You note that this is the first Hydracrowd machine in Australia, so I'm curious if there are more in other locations. I've been led to believe that the early trials of this system were not great successes? What is your opinion of the machine in action? I remember asking some of the Bucyrus guys at MINExpo 2000 when they were promoting the 795 about the hydraulic crowd they were proposing on that concept. I asked them about the speed of projection and retraction. Their response at the time was that they "had it figured out". There was no mention of flow rates or any other details. At MINExpo 2008 I was watching the Hydracrowd video when one of the Bucyrus guys walked up and asked me what I thought. I had to answer him honestly in saying that the video seemed to be lacking frames and was not "in sync". He asked what I meant by that, so I told him I thought it was purposely done to make the cylinder actuation and cycle time look faster. His reply was that the DVD player was malfunctioning, so I asked the same question from years ago and he said that they 'had it figured out". Realizing there was no reason to get into fluid dynamics or displacement theories with this guy, I had to just chuckle and walk away. If they really do have all the bugs worked out, that would be great and could possibly result in some company actually taking a risk on a 795!? I look forward to seeing unaltered video of Hydracrowd in action, but at this point I can't conceive that it can be as fast as a rope or rack and pinion arrangement!? I know the rod is 10" in diameter working in a 14" sleeve, but I can not find any information on the range of the cylinder assembly itself. Does anyone know? I may be willing to bet that Hermann Tilke designed the cab. He can't design race courses either!!!
Please use this before clicking "post"??? You may be surprised with what you see!
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Thanks for posting these great shots Tim.Would I be correct in saying that only 5 or 6 units of the "Super 2" shovels were delivered as Bucyrus machines but none of these were in standard corporate Bucyrus colours?
I notice they used the original graphics and not the latest Bucyrus branding/logo's and model designation on this particular shovel.
Look forward to seeing the 7495 soon!!
Regards
Brian C
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Thanks for the Info Brian. The latch'less dipper mmm  Seems a little odd TBH .. That would like putting your front door lock on the hinge side, The leverage force would be huge? Well I supose they design it to take the force. Wouldnt mind seeing some pics of it. Shovelman, If thats a 100ton + pass dipper then the Stick must be atleast 3 foot thick and the barrel atleaset 4' .. Again, Any specs guys. (Another good thread three pages gone replaced by crane crap)
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Here are a couple pics from the internet of the LatchFree Dipper Ross.   And here's a link to the brochure to give you some specs. https://mining.cat.com/cda/files/3105353/7/7495_HyrdraCrowd_AEHQ6516.pdf
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This is at curragh north, its working with liebherr T282B'S.
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The trucks are actually a new fleet of Liebherr T282C's. The 495HR2 is owned by Westfarmers Curragh and the trucks by Thesis. The 495HR2 is operated by Thesis. They also have a new 996B operating there.    Mitchtim
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Thanks for the pics and info Tim. Please keep the photos coming if you can, it's a very interesting thread. 
Scania V8. The best sounding truck in the world.
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I've always been curious about the hydra crowd. I can only imagine the hundreds of gallons of hydro oil that need to move in and out of the cylinder in one pass. Gee if they make the crowd hydraulic why not convert the whole machine to hydraulic power 
-Ethan Collection 8/2/2016For more of the Diorama and my collection: On Facebook or On YouTube
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Basketball Man wrote:I've always been curious about the hydra crowd. I can only imagine the hundreds of gallons of hydro oil that need to move in and out of the cylinder in one pass. Gee if they make the crowd hydraulic why not convert the whole machine to hydraulic power I'm just curious, what exactly would you like to see converted to hydraulic and why?
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Yes
Burton got the Liebherr 9800 Excavator with a fleet of 797F trucks
Curragh got the Bucyrus 495HR2 with a fleet liebherr T282C trucks
Mitchtim
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mitchtim wrote:Yes
Burton got the Liebherr 9800 Excavator with a fleet of 797F trucks
Curragh got the Bucyrus 495HR2 with a fleet liebherr T282C trucks
Mitchtim Tim, I think Burton got the better deal of the two...LOL.
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