It’s amazing how some of the stuff you film isn’t more than a few years old and looks like its been through a demolition derby then you have machines like this 40 odd years old and other than faded paint doesn’t hardly have a ding in it. Testament to good operators and mechanics.

@PAmining

4 ай бұрын

That's a very good point lol 🤣

Thx for showing our German technique! We are all miss here O&K.

@PAmining

4 ай бұрын

Very sad end to a great brand. Thanks

Thanks for taking us on a trip back to 1986, when the world was more simple and the machines were built for work! Great looking ole girl, looks well taken care of.

@frutt5k

4 ай бұрын

the internet killed all that....

@PAmining

4 ай бұрын

You're welcome 😁

I appreciate the time you take to research and find these relics of mining days gone by! Thank you.

@PAmining

4 ай бұрын

My pleasure and thank you! I'm glad you enjoy the videos :))

great classic machine, looks like her operator cares too, never seen such clean glass...!

@brianw8963

4 ай бұрын

Rugged looking machine and really nice looking condition for the year. And I concur with mrbluesky, must have had a caring operator”s”, even still has most of the paint on the counterweight, which is pretty rare for a machine of that vintage. Thanks Justin. 👍👍🇺🇸

@PAmining

4 ай бұрын

You're welcome guys

That old girl is in amazing shape for it age and looks like it’s still being used daily!..normally they are shook to pieces by this time or in a scrap heap…you would never know it was pushing 40 years old!…most mining excavators are lucky to see 10-15 years usage and then they are sent down the road!..O&K really knew how to build equipment and it’s so strange how they just one day decided to start building excavators and basically in a very short period happened to build some of the best machines money could buy!..it’s a testament to their engineering and commitment to building the best and most efficient machines possible!..great machine and great video!

@williamhall9204

4 ай бұрын

@MrMan5014 I totally agree with you, pertaining to the superb quality of O&K excavators. And let’s not forget that O&K built the giant RH-400 hydraulic shovel. That machine could actually compete with the massive rope shovels and the purchase cost for the mine owner was significantly less. The RH-400 was available with either diesel or electric power. I know O&K shipped the very first unit to the oil sands of Canada. I believe that first unit started working in 1996. Take Care.

@martymartin2894

4 ай бұрын

Old girls or excavators 😅😅

THANKS, Palley and O know that O&K was a staple in big mining opoerations but I hated to see them go down enough for Cat to grab hold of them. I bet that rig was a sweet rig to run. God Bless Yall and hope you're staying busy! We've got maple leaves the size of a squirrels ear and daffys blooming. Thanks, Pal!

I love your videos man. I dont think there is any other man on this planet who has seen this many different machines. That being said. I would love you to use a whiteboard and teach your most precious knowledge about these machines. Nevertheless you also deserve a professional camera, microphone and a video editing team behind your content. Because you have a voice of gold. Taurno

@PAmining

4 ай бұрын

Thank you friend! That means a lot and I appreciate it

Another great video.

Looks like a simple yet robust machine Nice video!

@PAmining

4 ай бұрын

It is and thank you!

Thanks 😎👍👍

Excellent video once again PA 👍👍👍 the O&K machines were well regarded over here 🏴󠁧󠁢󠁳󠁣󠁴󠁿

@PAmining

4 ай бұрын

Thanks friend! :D good machines

big ol horse.used to see these all over cadiz n north east ohio. back in way younger days

@PAmining

4 ай бұрын

Yes, there was a couple in Cadiz! But I believe those were straight RH75's?

Good to see the old girl is being well looked after. 🙂👍

Very nice presentation and display of this old but great looking machine. This machine looks to still have plenty of life left in her. Is this a back up for when the main digger is out for service?

@PAmining

4 ай бұрын

When I first visited this machine in 2010, it was the primary digger. Since then, she has been retired as a backup for a newer Cat 5130. Parts availability is what kills these older machines despite their amazing reliability

Nice shape

Love old classic machines, by todays standards you can make 2 machines from that much iron

Excellent again! Based on the machines condition and the shine/lack of pitting or rust on the hydraulic cylinders on the boom and stick, this one is being used fairly regularly still?

@PAmining

4 ай бұрын

Yes sir!

I guess they were pretty confident about their hydraulic pumps if they mounted them inside the hydraulic tank. Hey , just go and swap out the pumps will ya…😂😂

@PAmining

4 ай бұрын

I'm my opinion, not a good design lol, BUT! This is why I love doing older hydraulic excavators, the different ideas and techniques utilized is awesome

I wonder if the owners of this machine changed the joystick controls to Sae or iso or if it is still working with the old and strange controls that O&K had back in the day. I learnt to operate with that old controls, It took me a whole week to change the "chip" in my head and feel confident with the Iso controls

@PAmining

4 ай бұрын

In PA, we've always called this the "German" control setup lol

Love the videos! What is the reel at the top of the stairs seen around 3:24?

@BlackPill-pu4vi

4 ай бұрын

That is a grease gun hose reel and it gets fed by the green/white grease drum behind it. It's used for getting the zerk fittings that go to small stuff not handled by the central greasing system.

@imdavid28

4 ай бұрын

Thank you!

@PAmining

4 ай бұрын

BlackPill is correct. That hose is primarily used for greasing the bucket pins. These older excavators did not have automatic lubrication on the buckets

Love this big equipment and your explanations of tit. But I’m a little confused on terminology here: you refer to the two configurations as front shovel and “backhoe”. My limited understanding is that it would be an “excavator”, as a “backhoe” would be mounted on a front end loader type of tractor. Or are the terms interchangeable. I do know the control configurations are different. Just a discussion point!

@golfy808

4 ай бұрын

Manufacturers use the term backhoe.. even to this day..

@williamhall9204

4 ай бұрын

@tomrogers9467 I’ll attempt to clear up any confusion about the terminology. Try to completely disregard the image of a front end loader/backhoe. That type of machine does not pertain to surface mining. Next, the RH-75C seen in this video is a backhoe and some people refer to it as a trackhoe. A front shovel has a much different front end attachment attached to the superstructure. The front shovel is not designed to dig deep. The geometry of the front attachment is such that the bucket will be crowded into the rock & dirt horizontally as the operator lifts upward and curls the bucket. If you Google O&K RH400 you will clearly understand exactly what I’m describing. The terms backhoe and front shovel are not interchangeable. However many people will use the term excavator and backhoe to mean the same type of machine.To really eliminate all confusion, I like to refer to front shovel machines as hydraulic front shovels. Keep in mind that there are rope shovels in the mining industry also. Rope shovels are the most powerful and durable machines in the industry.Some have a bucket capacity of 120 tons or more. The bucket movement when digging is very similar to that of a hydraulic front shovel.

@PAmining

4 ай бұрын

So the machine itself is a hydraulic excavator, however when you get into bigger mining class machines where two front attachments are offered, manufactures tend to call them a "backhoe" or "front (face) shovel)". Now we can debate about what a "back hoe" truly is, however manufactures continue to call big mining excavators that to this day as a reference to the attachment, not the machine

@tomrogers9467

4 ай бұрын

@@PAmining Thanks for the clarification. And it does make sense, as the “backhoe” pulls inwards, or “back” towards the unit. Since a child, I’ve always loved heavy equipment. Thanks for showing us all the big toys most of us would never have the opportunity to get near. I guess at 71 I’m still living in Mike Mulligan days, LOL. Still have the book.

6:40 4600 dragline😛

@PAmining

4 ай бұрын

Yes sir!

@brianw8963

4 ай бұрын

Now we’re talking, where’s the 2400 hiding?

Sad but poetic ending. Dozens of old worn out strip mine equipment in a state with tens of thousands of acres of worthless strip mined ground too badly disturbed to good for anything. And don't try to feed me that reclamation nonsense.

Can anyone explain why every other lip on the track shoes has a bit of a squiggle in the center? Maybe it's just to spread out the linear pressure when on a solid surface rather than having only totally straight transverse pressure? Or does it somehow help clean the shoes from debris as they move?

@PAmining

4 ай бұрын

That's a very good question. If I had to guess, it's for tractive effort, but I'm not 100% sure, maybe someone else can chime in