O&K RH75 Documentary

[@josh33025]

I salute you sir for just shooting the video strait through with no edits. that's allot of information to remember all in one take.

[@PAmining]

Yes it is!! Sometimes it takes quit a few tries to get it right but I like presenting a smooth flowing video. Thanks!

[@jefferyspicioli9192]

Rode hard & put away wet. Thanks for doing these. I look forward to them.

[@craigsibley8161]

Excellent video once again 👍👍👍 I'm working through the bank catalogue. Looking like some awesome content to view...

[@airbats801]

Great video as always, I love all the rare and amazing equipment you bring to us on youtube!

[@PAmining]

Thanks! I always try to bring something unique to my Channel

[@blusharx]

Great docu. O&K was one of the important Company for very big Excavator. Sad to see the Story is past. Thx for uploading.

[@JimBobZee]

I always enjoy watching these interesting walk around videos.

[@PAmining]

Glad you enjoy them!

[@YensR]

Oh yeessss, great machine and documentary! 2:48 For the gear heads it might be worth pointing out that these are axial piston motors. They have higher speed and lower torque than what you need on the final drive, so we need a gear reduction. Nowadays, this reduction is done in a compact planetary (epicyclic) gear reduction, which is basically built around the motor, making for a small drive that can be tucked away neatly. (This comment has been edited to reflect Wesley's comments, sorry for getting it wrong at first :( ) The 4267psi hydraulic pressure converts to 295bar for our metric friends :)

[@PAmining]

Thanks for chiming in; love the added technical info! Thanks!

[@1984wcooper]

I've never seen an excavator use any radial piston motors. Axial piston pumps and axial piston motors on track drives, swing drives

[@YensR]

You are right, I couldn't believe it, for years I have been certain that they use radial piston motors, because the assembly is so short, but after looking around, I see that they manage that by tucking the axial piston motor inside of the planetary reduction. Thank you for pointing that out and sorry for talking rubbish! Do you know why they don't use radial piston motors, though? However, there is at least one excavator that uses radial piston motors: www.damitz-modelltechnik.de/content/produkte/funktionsmodelle/montagesaetze/bagger/index.htm ;)

[@horncrazzy09]

Another awesome video!! Always look forward to your video's

[@PAmining]

Thanks, glad you enjoyed it!

[@captaincoalpile1755]

You do outstanding camera work.

[@PAmining]

Thank you, I appreciate that!

[@KCIREDERF10]

Thank you for posting. Always enjoy your video's

[@joegermain1584]

Really like ur vids specially when u give operators view

[@PAmining]

Thanks, glad you like that angle too

[@BeytekinConstructionMachinery]

Good old German technique and steel! Sad all those companies and quality is gone and sold to the devil! ;-) I like your videos very much, excellent job.

[@PAmining]

Thank you! And yes, I'm hoping Caterpillar don't ruin their design

[@BeytekinConstructionMachinery]

We've to pray for it! ;-)

[@ferdinandocappelletti6740]

very beautiful video. These were serious strong excavators

[@viktormarioborsi8112]

Great video! You are very lucky to saw and touched this old O&K! I'm looking for hydraulic schematic for this model. Can you help me or do you have any idea?

[@tayloraagangg5058]

another great vid budy nice job again

[@buckthrusthorn8123]

Did you/or do you work in the mining industry? and how much research do you do or have you operated these machines?

[@PAmining]

Yes I work in the mining industry as a mine engineer. I always do a lot of research before I make a video like this. Thanks

[@michaelalan1546]

Hi, two questions. One how do you come across these awesome machines and secondly I would love to see a documentary on a large motorgrader some time. Thanks

[@PAmining]

I research and locate a lot of these machines. Graders are actually not as common as you might think on Pennsylvania surface mines. Most common are 16G's

[@michaelalan1546]

PAmining Thanks for responding.

[@strictlyxjs8750]

not gonna lie i was a little nevous whn you went up that rickity rust ladder. Another great video!

[@PAmining]

That one was solid, I've went up way worse! Thanks

[@donsherer1102]

I used two of these on a mining project in Zimbabwe back in the early 80's and when working they were great machines but the maintenance was difficult. The hydraulics were way over engineered and our difficult operating conditions made it almost impossible to keep them operating.

[@PAmining]

I had heard that these machines didn't use O-Rings on the hydraulic hoses and that the only way to keep them from leaking was to torque the fittings down as hard as you could?

[@donsherer1102]

It would take me 10 pages to just start with all the problems we had with the O&Ks but they did leak a lot. The biggest problem is that they were way over engineered and we were in a remote operating environment with little support.They never were able to function as an excavator and were used primarily to load our haul trucks.All the corporate people said they were great machines back in Germany but in Zimbabwe the Cat was the only machine up to the task.

[@GreenWork]

Great video. keep IT comming 😀😀😀

[@PAmining]

Thanks, glad you liked it!

[@jean-claudemuller4746]

O & K means Orenstein & Koppel, a german company created at the of 1876. My oncle sold theses machines in our country. 😊

[@PAmining]

That's awesome! So sad caterpillar closed the factory down :( I knew that was only a matter of time when they took over the line

[@Mr42960]

Another great video, very informative. Did you have to travel far to find her?

[@PAmining]

Every machine I film is a road trip! Thanks!

[@lewiemcneely9143]

Thanks pal. Good one. Hope someone gets it running before itn gets ragged out. Shame it's O&KIttypillar now too.

[@PAmining]

I would sure love to her an oldie like this run! Thanks

[@tooez90]

Another great video Justin...since this machine is retired, will it eventually be scraped for steel or will it sit and be scavenged for parts.

[@PAmining]

There was talk a few years back about putting it back to work, but I think that fell through when it was discovered that the engines were seized up. Sadly it will probably end up getting scrapped at some point. Thanks!

[@animenut69]

Couldn't they just swap in some rebuilt engines ?

[@markstengel7680]

Cool. 🚜👍

[@scruffy6151]

New to this site. Looks good and nice video. Did sub

[@PAmining]

Thanks and welcome!

[@EdStrong929]

another great video. thank you I've always wondered what does O & K mean?

[@PAmining]

O&K stands for Orenstein & Koppel. Thanks!

[@canvids1]

yup so sad to see these machines just left out in the unknown and rot there life away and thanks for your video.

[@nickchuron]

is it still operational or is it parked

[@PAmining]

She is retired

[@marcostelzer8737]

Another pro-documentary..... that is everytime perfekt ! Thank you PA mining :-)

[@coalminer1553]

Job I work on has a O&K 120H you talking about a rock moving machine 4-6 pass on a 789. Also the company I work for has a O&K 200 and 170

[@PAmining]

O&K's are digging animals. I'll have a documentary on an RH200 coming up in the future

[@williamsportwrestler]

Why do people always feel the need to break glass on equipment? I'll never get it.

[@bulbchangingmonkey]

would love to see it in operation...thank you for the video

[@PAmining]

Me too, I'd love to watch an old girl like this load some trucks again. Thanks!

[@nuts319]

when do you figure this machine was last in operation?

[@PAmining]

I want to say sometime in the early 90s but I could be wrong

[@melvinschmecklebak3766]

Very good video. I assume this machine is retired

[@PAmining]

Thanks, and yes it is

[@blakeb1992]

Haha I think its a good thing the lock was on the door, you wouldn't be able to get in there anyway with all the glass!

[@maxpuppy96]

Why would someone abandon that machine its got to be worth almost 10,000 in scrap alone, I know the engines are worth couple thousand a piece, there truck engines. Good video

[@Jt440ex]

This machine isn't abandoned, just idled as it was no longer needed by the operation.

[@jamielacourse7578]

After watching the RH200 video this almost looks like a kids Tonka......

[@cartoonfan959]

were american products so bad that they had to import german machinery ?

[@PAmining]

At this time, European manufactures were way ahead of the American manufactures with their hydraulic technology. American manufactures were still pushing cable excavators in the industry when other manufactures were introducing hydraulic excavators. This is why brands like Demag, O&K, and Liebherr are so popular around the world today.

[@cartoonfan959]

AFAIk Demag was assimilated by the Terex ( resistance was futile) , O & K was taken over by New Holland

[@PAmining]

Demag was bought out by Komatsu, Terex purchased the mining division from O&K

[@cartoonfan959]

ahh yes, but I remember the Demag crane division was taken over by Terex KOmatsu also bough HANOMAG , the german producer of wheel loaders regarding O & K weren't the wheel loaders sold in USA under TROJAN make ? some of them even had a red/white O&K color scheme d323w7klwy72q3.cloudfront.net/i/a/2013/20130531oktx/G5729.JPG