My great-grandfather left home at 14, and no-one today knows how he managed this, but somehow learned how to run an RD6. That same year he hitched into the rough project of building the Fort Peck Dam in Montanna, living in a tin and plywood shed at night and driving one of these every day. When I was little - maybe 6-8 years old - he stopped his truck one day to show me a Caterpillar RD6 hauling big lumber like your opening shot in a forest off of Highway 101 on the Oregon Coast near where he lived. He told me about how much he loved driving it when he was a young man, and to this day if I have a chance to stop and listen to a big old Caterpillar tractor, and no-one is in the car with me, I will stop and listen to that amazing sound and my amazing grandfather is there with me. Thank you for making this video on my birthday; I'm about the same age he was when that happened.
It would be just like an artillery shell that was dropped on the ground during loading. The rods are not travelling fast enough to fly any distance whatsoever.
I've been a heavy diesel mechanic all my life. Extremely excellent demonstration and narration to answer the viewer's questions. You should consider teaching at some level.
Agreed. Some people can talk all day an not teach a single thing. This dude just has the knack for it. When people really know what they're talking about it, they believe it, hopefully because it's true. This dude, knows and believes what he is saying because it is indeed true. That translates into natural teaching. Good shit.
I agree. I also have been a heavy line diesel mechanic and he does explain it well. It makes it easier for people who don’t know these things so they can learn it. Good job spreading the knowledge!
Hello. So this fellow has a 2007 International 9400i it has a Caterpillar C 15 in it. Has some rust and the engine has 645,000 miles. I'm thinking of buying it and rebuilding it.
@@mathewkromeo2934 Make sure that C15 isn't the 2007-emissions engine that has the particulate trap. Some people had trouble getting the engine to regen at highway speeds due to the extra exhaust flow, requiring a parked regen. Some other people had trouble getting it to regen at all!
I don't think you can do a direct conversion to metric as used by Europeans etc, seem to remember Americans measure the total cylinder volume with the piston at BDC while the rest of us only measure swept volume? I could be wrong, things might have changed over the years but I definitely remember that you couldn't directly compare the number on the 70's V8s.
@@popuptoaster you could always compare engine size directly once you converted those silly cubic inches to sensible cubic centimeters. It was power output you couldn't compare because the Americans measured it without any auxilliaries connected which gave a much higher reading than the European way.
It is an extremely inaccurate explanations of horsepower versus torque. Horsepower is work overtime, torque is an instantaneous force. 50 horsepower is 50 horsepower, it all comes down to gearing.
@@otm646 Not to sound contrary, my friend, but doesn't gearing imply leverage, as his demonstration conveyed ? I don't feel that his explaination negates your assertion as what you say is true also, however, he mentions that the beauty of this machine is that that particular engine can deliver torque through a large "rotating mass" at hundreds of RPM's, rather than "granny gear" high speed.
Common to a lot of people who want it simple & appreciate mechanical power at the human size level. Even to see that guy drag that huge stump with a little Cat was impressive.
I appreciate a true craftsman who not only can operate, but repair and most importantly explain the engineering involved. I found this channel completely by accident but now t has quickly become one of my favorites!
My grandad bought a brand new 1946 D-6 Cat, in 1946. LOL Up to then, he used horses to pull the equipment on the ranch. It was HUGE. It was six cylinder, smooooth running power. In low range first gear it would climb a slope we called the tractor hill that was so steep that you were a little anxious to even walk up. We used it to skid logs, and to farm a 5,000 acre wheat ranch. It pulled everything from self leveling combines to 70 foot wide double disc harrows over terrain that was very steeply sloped on most of it. I remember driving this Cat when I was 12 or 13, pulling rod weeders on some of the fields close to the house, just before my Dad ran over them with the seed drill. Had to crawl into the clutch tunnel once, to remove bolts because my Dad was too big to fit, because my older brother forgot to release the clutch while idling in neutral, and burnt up the dry clutch. My Dad finally retired from farming in 1980, and sold the D-6 for $45,000, which is about twice what they paid for it new. I did not love that tractor. It had a gasoline pony motor as a starter that was a real bitch to start in Washington State -20F winters, and God help you if you stalled it with the pony motor clutch engaged. Which I did once and once only. The pony motor was, of course, started with a pull rope. Ah, the memories..... The only thing that sounds more pop pop pop than that three cylinder Cat is a two cylinder John Deere crawler. About half the size and seemed like a piston fired every second or so at full bore.
I just love the sound of that old tractor. Like some others, I didn't know CAT made 3 cylinder engines either. I sure am glad they did. They have that wicked sound. Great video!
Awesome explanation I worked at a gravel bank years ago and would reclaim with an old D8. You could count the fan blades go around she'd never stall. Thanks for bringing back memories.
I had the chance to run a D8 about 20 years ago that if memory serves me right was built in 1947. After running a newer version D6 from the early 90's it was really something to fill the blade of that D8 on a long push and feel it put it's head down and work. That D6 was nice with all the newer technology but it was a screamer and burned more fuel for the same amount of work at the end of the day as that D8. My John Deere two-cylinders from the same era share the same concept of torque and low RPM to get work done. My D has a bore and stroke of 6.175 X 7 (501 cubes) at 900 RPM, 29 draw bar, 42 belt hp. My 820 diesel is 6.125 X 8 (470 cubes) at 1125 RPM, 67 draw bar, 72 belt hp. Those old timer engineers understood big bore and torque and put it to good use, probably one of the biggest reasons this old equipment has lasted as long as it has!
They sure are a great bulldozer to have i want one as well. I know where a RD6 is but its in Tasmania where i live and it has not gone in over 30 years and would have to be pulled from where it is at the moment which is under some trees. But it would be a bulldozer that could be worth getting
Thank you so much, my father Russell C. Shepherd, S Sgt., was a Sherman tank commander who volunteered for the Army in October 1941, landed on Normandy Beach and fought the Nazis all the way to Berlin. He was a farm boy, Second Armored Division, 702 Tank Destroyer Battalion, Company B, engaged one on one with a German MarkIV King Tiger tank and destroyed it October 1944...also received numerous medals...farm boy to war hero!
My neighbor had one of these when I was a kid, it would lug down to what sounded like about 200 RPM - maybe less! Low speed, high torque engines make my soul sing - that's REAL power!
"Those who can, do. Those who can't, teach." You do a fine job doing both. You're obviously a skilled mechanic, and you're a better teacher than most I've experienced in my lifetime. Kudos!
Horsepower = work/time Torque = turning force (work) 600 rpm at maximum torque is crazy slow which = low horsepower. Horsepower multiplied by 5252 divided by 600rpm equals 446 ft-lbs
These things were rated at about 50 to 60 horse power (52 by the spec sheet). They later got replaced by a 6 cylinder rated at 72 hp. These were slowed alot by drive train inertia and provided 45 and 55 HP at the draw bar respectively.
one HP is the ability to move 33000lbs one FT in one minute. Worked out by James Watt of steam engine fame, by how much coal could be pulled from the mine, also the unit of energy was named after him, Watt.
I saw a printed saying one time that described it as: Horsepower is how fast you hit the wall, Torque is how far you take the wall with you. thought that was fairly clever in a simple way 😊 really enjoy the CATS !
I love the sound of big bore cats when they are lugged down and pulling hard that chop and echo in the exhaust just sounds cool and tuff to me, it kinda like the inverse of a screaming Jimmy
Thank you for the great demonstration and explanation! I love those old heavy, slow turning engines! Amazing torque, yet horsepower so modest from the old engines.
This is one of the most interesting videos I've watched in a long time! I grew up on a homestead in Alaska, in the late 1940s and through the 1950s. My dad and our nearest neighbor cleared our place and our neighbor worked on his with a WWII surplus RD8 that was a remnant of the WWII Alcan Highway project. I read somewhere that the Army had something like 1500 of these RD8s on that project and they sold most of them for salvage right after the war was over. They were built from about 1935 to 1937. I remember my dad starting that beast in the winter with temps down around -20 degrees with a blow torch on the oil pan. Even with that, that little pony engine worked its tail off trying to get some life into that big 6. They may only have only had about 100 hp but they got an awful lot of work done both during the war, working between Alaska and Canada, and on our place throughout the 1950s. Oh, by the way, you've got another new subscriber. I'll be watching for more very interesting stories! Thanks, Gary
Thanks and welcome aboard! I always give new subscribers a heads-up that I've got every video on the channel organized in Playlists where you can browse the different topics and select the type of videos that you want to see, all in one place and in order from earliest to most recent. Click on the "Playlists" tab on the main channel page and you're all set :-)
Incredible engine and explanation ! The engineers really knew what they were doing back in the day, this was also before pollution controls where the only thing that really mattered was brute torque and reliability.. It will run almost forever ..Those days are gone.....
Toby, Great explanation ! Most interesting to learn about. Love the sound of that big old 3 cylinder working ! As always, Thanks for sharing ! Never a dull moment at your place !
Great vid very, very good explanation. I've worked on locomotives for over 25+ years, on everything EMD made, GE, and ALCOs as well. Best engines ever? The 251-C, D, E series from Schenectady! Cats...love 'em too. Worked on 'em in fishing boats as engineer on main power, and aux power plants. Greatest marine diesel out there bar non!
That friend was a great video. What an explanation! I love the way they sound too. I just hear ground pounding torque. And yet it just cheeches along like nothing doin!
This is the first video I watched from this guy and boy do I wish more UA-camrs explain things as well as this man. Even brought out the manual and gave us numbers with interesting facts.
Actually, HORSEPOWER Is defined as the ability to do a certain amount of work in a given amount of time and TORQUE is defined by the twisting force of a shaft. One horsepower is 33,000 Ft.Lbs. per minute. It's the same as lifting 3,300 lbs 10 feet in one minute. or 550 ft. Lbs. per Second or 1,980,000 Ft. Lbs. per hour. JAMES WATT Came up the unit of horsepower while using a large draft (draught) horse to measure the horsepower of his steam engines. Power is the rate at which the work is done therefore the formula is POWER = Foot Pounds divided by Minutes. Ok: Horsepower - Speed vs Torque-Strength.
Excellent video! I stumbled upon your video and out of curiosity, I watched it. Now I find myself wanting one just because the RD6 is so impressive! I would never use it but what a great investment!
That Cat RD 6 brings back memories of my dad in late 50s early 60s yep he ran a D 8 doser and in 65 he bot a komatsu.front end loader but he always raved about the cat.i still have his cat brass belt buckel. Grate vid on the RD6.thanks.
Very good explanation of torque vs HP. lt was always a bit fuzzy for me but always did have a grasp of how adding length to a lever increase ft. pounds of torque. Using those cranks and tying that concept to the length of piston rods made it all snap into place for me. Thanks much!
That was really cool! A great explanation of power and torque as well as why these gutsy little tractors were designed to chug along so slowly, just doin' their thing!
I love the sound of old CAT engines. The older bulldozers made some sweet sounds. The 1693 truck engines with pre-combustion chambers ( indirect injection) made some very interesting sounds. Find some videos on old Murphy Diesels, and I'm sure you'll love the sounds they made. My old 237 MACK diesel had a great sound. It would lug down to 850 rpms going through soft ground and just keep on going. I love engines that were built for lugging.
phgoil Obviously, he’s lifted a total of 5000lb compared to the first guy’s 4000lb. But the first guy is obviously capable of exerting more force, even if he doesn’t do as much work. Torque vs horsepower.
in few minutes this man shows all the details needed ! Amazing presentation mostly because he knows what his is saying and he loves classic models which means he knows what is best
What a torque monster; you don't need RPM with the bore and stroke that's there with that beast. With a minimum of servicing these engines can last for a lifetime and more; old technology at its best. I enjoyed this video and no I didn't get bored. In fact you've got a new subscriber.
Thanks for sharing and providing the education on the D6! I was "wowed" with the size of the pistons...explained a lot. Surprising that there were only 3 of them, but they certainly get the job done!
Man I am 43 and worked for a big paving company out of NC . I remember them pulling out this old rd8 . The fist time I seen that thing I was astonished at it mass compared to the d11 . The old guys had it brought to a job to use as a pusher because the newer machine couldn't get it . When that 70 year old man got on it he looked like he was taking his mistress out one more time . Even as a young man I knew I was whitnessing something special . And boy that thing was amazing . All the old guys stood and watched as it out performed the new machines .
Didn't used to be drawn to this but I love motorcycle engines & marine diesel engines. This RD6 information is valuable learning material. I am probably not alone in saying " I want one"!
My great-grandfather left home at 14, and no-one today knows how he managed this, but somehow learned how to run an RD6. That same year he hitched into the rough project of building the Fort Peck Dam in Montanna, living in a tin and plywood shed at night and driving one of these every day. When I was little - maybe 6-8 years old - he stopped his truck one day to show me a Caterpillar RD6 hauling big lumber like your opening shot in a forest off of Highway 101 on the Oregon Coast near where he lived. He told me about how much he loved driving it when he was a young man, and to this day if I have a chance to stop and listen to a big old Caterpillar tractor, and no-one is in the car with me, I will stop and listen to that amazing sound and my amazing grandfather is there with me. Thank you for making this video on my birthday; I'm about the same age he was when that happened.
If it ever threw a rod it won't be shrapnel it would be an artillery shell.
The way they knock it sounds like its about to chuck a rod at any moment lol
@@elilachappa3330 the way diesels should be...
It would be just like an artillery shell that was dropped on the ground during loading. The rods are not travelling fast enough to fly any distance whatsoever.
@@johncoops6897 yeah 600 Rpm wouldn't launch it as far as if it spun 4k rpm
I wouldn't want to be within a 100 yds of a major failure. of that beast!!
I love cool shit like this when it randomly gets recommended to me lol
Me too... I knew the torque Vs horsepower thing but a great way of getting the idea over.
Boom!
Very interesting!!! I love the sound of that hard working D6 Cat!!!
Same
Totally agree
As a retired CAT&CUMMINGS knuckle buster I tell people quiet often that HP doesn't do the work TORQUE is what does the work!!!
I've been a heavy diesel mechanic all my life. Extremely excellent demonstration and narration to answer the viewer's questions. You should consider teaching at some level.
He does, every time he posts a video!
Agreed. Some people can talk all day an not teach a single thing. This dude just has the knack for it. When people really know what they're talking about it, they believe it, hopefully because it's true. This dude, knows and believes what he is saying because it is indeed true. That translates into natural teaching. Good shit.
I agree. I also have been a heavy line diesel mechanic and he does explain it well. It makes it easier for people who don’t know these things so they can learn it. Good job spreading the knowledge!
Hello. So this fellow has a 2007 International 9400i it has a Caterpillar C 15 in it. Has some rust and the engine has 645,000 miles. I'm thinking of buying it and rebuilding it.
@@mathewkromeo2934 Make sure that C15 isn't the 2007-emissions engine that has the particulate trap. Some people had trouble getting the engine to regen at highway speeds due to the extra exhaust flow, requiring a parked regen. Some other people had trouble getting it to regen at all!
4 years of diesel school and six years in the shop. Never have I heard anything explained so simply and so thoroughly. Well done.
"When this thing really lays back, gets under load and starts cackling."
Well said.
I've heard lesser men say that about their wives! Hey Oh!!
“When she starts makin noise”
@@T..C..M lol
This guy didn’t bore me. He’s knowledgeable, articulate, and concise. Great teacher. Thank you sir.
One liter is 61.0254 cubic inches. Ten liters out of 3 pistons!
The Lanz Bulldog uses a single cylinder hot bulb engine with 10.3L of displacement producing 55hp at 750rpm.
But then there's the CAT 3508! 34.5L from 8!!!! ...and also over 1000hp at 1500rpm.
@@Zigg317 yeah but each cylinder is a puny 4.3L
I don't think you can do a direct conversion to metric as used by Europeans etc, seem to remember Americans measure the total cylinder volume with the piston at BDC while the rest of us only measure swept volume? I could be wrong, things might have changed over the years but I definitely remember that you couldn't directly compare the number on the 70's V8s.
@@popuptoaster you could always compare engine size directly once you converted those silly cubic inches to sensible cubic centimeters. It was power output you couldn't compare because the Americans measured it without any auxilliaries connected which gave a much higher reading than the European way.
That was the clearest explaination of HP vs torque I've heard to date.
It is an extremely inaccurate explanations of horsepower versus torque.
Horsepower is work overtime, torque is an instantaneous force.
50 horsepower is 50 horsepower, it all comes down to gearing.
@@otm646 The description I've always heard is: Torque gets you up to speed, horsepower holds you there.
Just a Wee bit of googling and the way he explains it is spot on
@@otm646 Not to sound contrary, my friend, but doesn't gearing imply leverage, as his demonstration conveyed ? I don't feel that his explaination negates your assertion as what you say is true also, however, he mentions that the beauty of this machine is that that particular engine can deliver torque through a large "rotating mass" at hundreds of RPM's, rather than "granny gear" high speed.
In car terms horsepower is how fast you hit the wall, torque is how far you get through the wall!
if i had the cash i would buy a dozer and some land and just push stuff around.
Same man
That’s what my brother did. Never been happier.
Common to a lot of people who want it simple & appreciate mechanical power at the human size level. Even to see that guy drag that huge stump with a little Cat was impressive.
You can get a job and they will pay you to do that
@@ThisIsSolution you need skills for a job, doubt anyone would want to pay me for playing around like a kid.
Excellent tutorial. One camera, one man, one machine got more information across than most would with fancy graphics or recycled footage.
I just love videos like this - someone who really knows and loves their subject, explaining it clearly and concisely. This is fascinating.
I appreciate a true craftsman who not only can operate, but repair and most importantly explain the engineering involved. I found this channel completely by accident but now t has quickly become one of my favorites!
My grandad bought a brand new 1946 D-6 Cat, in 1946. LOL Up to then, he used horses to pull the equipment on the ranch.
It was HUGE. It was six cylinder, smooooth running power. In low range first gear it would climb a slope we called the tractor hill that was so steep that you were a little anxious to even walk up. We used it to skid logs, and to farm a 5,000 acre wheat ranch. It pulled everything from self leveling combines to 70 foot wide double disc harrows over terrain that was very steeply sloped on most of it. I remember driving this Cat when I was 12 or 13, pulling rod weeders on some of the fields close to the house, just before my Dad ran over them with the seed drill. Had to crawl into the clutch tunnel once, to remove bolts because my Dad was too big to fit, because my older brother forgot to release the clutch while idling in neutral, and burnt up the dry clutch. My Dad finally retired from farming in 1980, and sold the D-6 for $45,000, which is about twice what they paid for it new.
I did not love that tractor. It had a gasoline pony motor as a starter that was a real bitch to start in Washington State -20F winters, and God help you if you stalled it with the pony motor clutch engaged. Which I did once and once only. The pony motor was, of course, started with a pull rope. Ah, the memories.....
The only thing that sounds more pop pop pop than that three cylinder Cat is a two cylinder John Deere crawler. About half the size and seemed like a piston fired every second or so at full bore.
I just love the sound of that old tractor. Like some others, I didn't know CAT made 3 cylinder engines either. I sure am glad they did. They have that wicked sound. Great video!
This RD6 will be running perfectly a hundred and fifty years from now. Great video, Cheers !
Yup, built to last.
Awesome explanation
I worked at a gravel bank years ago and would reclaim with an old D8. You could count the fan blades go around she'd never stall. Thanks for bringing back memories.
Not boring what so ever. A great explanation of big bore/stroke, low rpm & massive torque. Thank you.
My favorite part is at the end when he takes his stump out for a walk around the property lol
I had the chance to run a D8 about 20 years ago that if memory serves me right was built in 1947. After running a newer version D6 from the early 90's it was really something to fill the blade of that D8 on a long push and feel it put it's head down and work. That D6 was nice with all the newer technology but it was a screamer and burned more fuel for the same amount of work at the end of the day as that D8. My John Deere two-cylinders from the same era share the same concept of torque and low RPM to get work done. My D has a bore and stroke of 6.175 X 7 (501 cubes) at 900 RPM, 29 draw bar, 42 belt hp. My 820 diesel is 6.125 X 8 (470 cubes) at 1125 RPM, 67 draw bar, 72 belt hp. Those old timer engineers understood big bore and torque and put it to good use, probably one of the biggest reasons this old equipment has lasted as long as it has!
Same bore and stroke as a John Deere model R, which was rated to 54 HP@975 RPM from Two Cylinders.
Ok, now I want an RD-6
They sure are a great bulldozer to have i want one as well. I know where a RD6 is but its in Tasmania where i live and it has not gone in over 30 years and would have to be pulled from where it is at the moment which is under some trees. But it would be a bulldozer that could be worth getting
I knew the 2 cylinder Deere and this Cat Dozer sounded alike!
Get in the line!!
@@stuartomant4033 RD6's are a pretty rare thing down here in Tasmania you should probably jump on that one
@@joesgarage8372 Agreed but just have to try and find the owner
You really taught this well. Loved your analogy in explaining torque vs HP. Good job.
Someone once said horsepower is how hard you hit the wall. Torque is how far you take the wall with you
I am a big fan of slow turning diesels. this one is my new favorite.
Me too !!
So ironically, it's actually quite under-square, making it technically a very big small bore. Very cool. Thanks for the video.
Thank you so much, my father Russell C. Shepherd, S Sgt., was a Sherman tank commander who volunteered for the Army in October 1941, landed on Normandy Beach and fought the Nazis all the way to Berlin. He was a farm boy, Second Armored Division, 702 Tank Destroyer Battalion, Company B, engaged one on one with a German MarkIV King Tiger tank and destroyed it October 1944...also received numerous medals...farm boy to war hero!
My neighbor had one of these when I was a kid, it would lug down to what sounded like about 200 RPM - maybe less! Low speed, high torque engines make my soul sing - that's REAL power!
You sound so smart sir. Very rare nowadays. Have a like.
"Those who can, do. Those who can't, teach." You do a fine job doing both. You're obviously a skilled mechanic, and you're a better teacher than most I've experienced in my lifetime. Kudos!
The doers don't know what to do with out the teachers , that saying is dumbass cousin lovin talk radio dribble
@@fowletm1992 VERY GOOD,,,,,,,I LIKE THAT.
You forgot the part, "Those who can't teach, teach the teachers."
Horsepower = work/time
Torque = turning force (work)
600 rpm at maximum torque is crazy slow which = low horsepower.
Horsepower multiplied by 5252 divided by 600rpm equals 446 ft-lbs
These things were rated at about 50 to 60 horse power (52 by the spec sheet). They later got replaced by a 6 cylinder rated at 72 hp.
These were slowed alot by drive train inertia and provided 45 and 55 HP at the draw bar respectively.
As I explained to a friend with a little turbo-charged sportscar (trying to encourage her to use more revs) - "ergs = spin times oomph"
You don't need much power for a dozer. More than 10hp per ton is wasted.
@@johnwade1095 Depends on how fast you want to be dozing ;) Wanna pull that tree at 1.2 mph or 12 mph?
A vulgar excess of power is usually just about enough.
411 lbs of torque by my calculation. That's a beast!
at 600 rpm load or max rpm? glad someone did the math.
closer to 450
446
one HP is the ability to move 33000lbs one FT in one minute. Worked out by James Watt of steam engine fame,
by how much coal could be pulled from the mine, also the unit of energy was named after him, Watt.
That Engine is indeed a thing of beauty thanks for explaining
Regards Steve
I saw a printed saying one time that described it as: Horsepower is how fast you hit the wall, Torque is how far you take the wall with you. thought that was fairly clever in a simple way 😊 really enjoy the CATS !
Wow! I’ll have to remember that!
I love the sound of big bore cats when they are lugged down and pulling hard that chop and echo in the exhaust just sounds cool and tuff to me, it kinda like the inverse of a screaming Jimmy
Thank you for the great demonstration and explanation! I love those old heavy, slow turning engines! Amazing torque, yet horsepower so modest from the old engines.
Gotta love the slow turning cat engines.
I used to work on an old direct reversing Superior diesel 14 1/2" bore X 20" stroke. Idle 125 RPM, full speed 350 RPM. Sweet sounding engine.
So the piston didn't move, the engine jumped up and down?
My Dad would have loved this, he used to service those great machines. 😥👌🏼
DeadlyDiddly rip
This is one of the most interesting videos I've watched in a long time! I grew up on a homestead in Alaska, in the late 1940s and through the 1950s. My dad and our nearest neighbor cleared our place and our neighbor worked on his with a WWII surplus RD8 that was a remnant of the WWII Alcan Highway project. I read somewhere that the Army had something like 1500 of these RD8s on that project and they sold most of them for salvage right after the war was over. They were built from about 1935 to 1937. I remember my dad starting that beast in the winter with temps down around -20 degrees with a blow torch on the oil pan. Even with that, that little pony engine worked its tail off trying to get some life into that big 6. They may only have only had about 100 hp but they got an awful lot of work done both during the war, working between Alaska and Canada, and on our place throughout the 1950s. Oh, by the way, you've got another new subscriber. I'll be watching for more very interesting stories! Thanks, Gary
Thanks and welcome aboard! I always give new subscribers a heads-up that I've got every video on the channel organized in Playlists where you can browse the different topics and select the type of videos that you want to see, all in one place and in order from earliest to most recent. Click on the "Playlists" tab on the main channel page and you're all set :-)
Wow, Great demonstration, I never knew anything about a RD6 , but the sound. Thanks
Great & informative! That piston/rod assembly was a monster!
Very good description of how they work. Thanks, I learned something today!
Incredible engine and explanation ! The engineers really knew what they were doing back in the day, this was also before pollution controls where the only thing that really mattered was brute torque and reliability..
It will run almost forever ..Those days are gone.....
Thanks Professor Toby! I am glad you took the time to bring class into session.
Informative.down to earth . Nice guy. Well planned presentation. Best if seen for a long time.
That sound brings back memories of my childhood on the farm☺
Thanks so much for explaining torque! Seeing your explanation with the 2 different length cranks helped me to finally understand it!!
Amazing!!! The learning curve in my life has expanded exponentially.
Thank you for sharing.
Sounds like my waistline 😉
Great video and thanks for posting. Love to hear these old diesels, you can really tell it’s got power by just by the sound!
Great video. I like the way you explain the fundamental technical details in laymen's terms.
What an excellent demonstration and presentation, very well done Sir!
Best explanation of relationship of torque and horsepower i ever heard. Excellent job!
Thanks for the explanation
Love the big slow running Cats
Toby,
Great explanation ! Most interesting to learn about. Love the sound of that big old 3 cylinder working !
As always, Thanks for sharing ! Never a dull moment at your place !
Love this video. I used to pull logs from the woods back in the 80s with one of these. From what I know it's still in use :-)
Fantastic video! The piston comparison was impressive.
Very interesting and informative loved how you explained HP/Torque ! Loved the sound that RD 6
Wow, truly an impressive old-school engine design...really good interesting video!
The first tractor I ever ran was an RD-7. We used to joke about how you could lug it down until you could count the strokes. Thanks for posting.
Great vid very, very good explanation. I've worked on locomotives for over 25+ years, on everything EMD made, GE, and ALCOs as well. Best engines ever? The 251-C, D, E series from Schenectady! Cats...love 'em too. Worked on 'em in fishing boats as engineer on main power, and aux power plants. Greatest marine diesel out there bar non!
That friend was a great video. What an explanation! I love the way they sound too. I just hear ground pounding torque. And yet it just cheeches along like nothing doin!
Your enthusiasm for this machine and its details is really contagious.
That's the best explanation of the difference between torque and horsepower that I have ever heard and understood it rightoff
This is the first video I watched from this guy and boy do I wish more UA-camrs explain things as well as this man. Even brought out the manual and gave us numbers with interesting facts.
Excellent video. I'm an old coot and can remember the sound of these machines working, even though I'm not mechanically gifted.
This video randomly appeared in my homepage recommended section. I'm really glad i watched it, great and fascinating video.
Just ran across you,r channel ,seriously enjoyed how you explained and answerd the question looking forward to watching many more .
Horsepower is how fast you hit the wall and torque is how far you take the wall with you. Fantastic video !
I heard torque gets you moving and horsepower keeps you there.
No, Johnny, it's the other way around.
You're comparing velocity and momentum to horsepower and torque. Not really the same thing.
Actually, HORSEPOWER Is defined as the ability to do a certain amount of work in a given amount of time and TORQUE is defined by the twisting force of a shaft. One horsepower is 33,000 Ft.Lbs. per minute. It's the same as lifting 3,300 lbs 10 feet in one minute. or 550 ft. Lbs. per Second or 1,980,000 Ft. Lbs. per hour. JAMES WATT Came up the unit of horsepower while using a large draft (draught) horse to measure the horsepower of his steam engines. Power is the rate at which the work is done therefore the formula is POWER = Foot Pounds divided by Minutes. Ok: Horsepower - Speed vs Torque-Strength.
Thanks for correcting yourself, @@Counselor77. You should just edit your main post with this material (except without all the random capital letters).
No boredom here! Thanks for the tutorial !!
Thank you. I know more now than I did before. You kept me interested and you kept the pace moving.
This is an excellent explanation of horsepower vs torque. Thank you very much
Excellent video! I stumbled upon your video and out of curiosity, I watched it. Now I find myself wanting one just because the RD6 is so impressive! I would never use it but what a great investment!
That Cat RD 6 brings back memories of my dad in late 50s early 60s yep he ran a D 8 doser and in 65 he bot a komatsu.front end loader but he always raved about the cat.i still have his cat brass belt buckel. Grate vid on the RD6.thanks.
Very good explanation of torque vs HP. lt was always a bit fuzzy for me but always did have a grasp of how adding length to a lever increase ft. pounds of torque. Using those cranks and tying that concept to the length of piston rods made it all snap into place for me. Thanks much!
That was really cool! A great explanation of power and torque as well as why these gutsy little tractors were designed to chug along so slowly, just doin' their thing!
We had two RD-6's on our farm in South Florida, Both had the three cylinder engines. Thanks for sharing this video.
Another
Squatch253 school-day! Loving these lessons, and wishing everyday was a school day like this...
I love the sound of old CAT engines. The older bulldozers made some sweet sounds. The 1693 truck engines with pre-combustion chambers ( indirect injection) made some very interesting sounds. Find some videos on old Murphy Diesels, and I'm sure you'll love the sounds they made. My old 237 MACK diesel had a great sound. It would lug down to 850 rpms going through soft ground and just keep on going. I love engines that were built for lugging.
I had an old Sea-Bees WW2 RD-7. Wonderful old dozer. Great explanation of "Torque Rise".
Designed at a time before everyone was asking, "But how much horsepower does it make?".
Torque gets it done.
RPM is funny too. Our Massey Ferguson idled at below 800.
I use 2 guys at the gym to illustrate torque vs HP. Guy #1 benches 400lb 10 times, guy #2 benches 200lb 25 times. Who’s stronger? Who does more work?
If only people knew the relationship between Power and Torque 🙄🙄🙄
@@NH2112 in your example the second guy is doing more work 😂
phgoil Obviously, he’s lifted a total of 5000lb compared to the first guy’s 4000lb. But the first guy is obviously capable of exerting more force, even if he doesn’t do as much work. Torque vs horsepower.
in few minutes this man shows all the details needed ! Amazing presentation mostly because he knows what his is saying and he loves classic models which means he knows what is best
Yeah. Also clear speech and good pronunciation.
I'll never hear one of these the same way again! Thanks Squatch.
The best explanation I've ever heard, right on, 90 years young. Cheers.
What a torque monster; you don't need RPM with the bore and stroke that's there with that beast. With a minimum of servicing these engines can last for a lifetime and more; old technology at its best. I enjoyed this video and no I didn't get bored. In fact you've got a new subscriber.
Nice explanation love that sound
Thanks for sharing and providing the education on the D6! I was "wowed" with the size of the pistons...explained a lot. Surprising that there were only 3 of them, but they certainly get the job done!
Man I am 43 and worked for a big paving company out of NC . I remember them pulling out this old rd8 . The fist time I seen that thing I was astonished at it mass compared to the d11 . The old guys had it brought to a job to use as a pusher because the newer machine couldn't get it . When that 70 year old man got on it he looked like he was taking his mistress out one more time . Even as a young man I knew I was whitnessing something special . And boy that thing was amazing . All the old guys stood and watched as it out performed the new machines .
A good, interesting presentation. My brother has equipment. I'm sending this to him.
Thanks. Fascinating.
Once again I'm watching every delicious moment of these old dozer vids...LOVE IT!!!
Best documentary tutorial on UA-cam. Ever!
Honestly you need a video of just the SOUND. BEAUTIFUL.
Didn't used to be drawn to this but I love motorcycle engines & marine diesel engines. This RD6 information is valuable learning material. I am probably not alone in saying " I want one"!
I don’t know much but I know everything you said is awesome and it’s an incredible machine.
Excellent explanation of how torque works. Love the sound as well.
Love that Cat grunt. Had a early D4- 7u. Now a D-6 9 u. Love the sound under load.
I don't even like tractors or knew what a D6 is. But it was such an amazing, informative video. Subscribed.
Awesome job explaining that cat has always been a low rpm high torque engine great lugging power.
very well put together...nice delivery of the information
Wow that sound brought back a ton of memories from tractor shows and my Grandparent's farm. Awesome vid!