Caterpillar D8 8R Documentary
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- Опубліковано 10 лип 2024
- A look at a vintage 1944 Caterpillar 8R Series D8 tractor equipped with an R.G. LeTourneau model K-8 bulldozer. Thanks to the PAmining Team, this dozer is now in the process of getting a new home in the hands of a collector.
Chapter List:
0:00 Introduction History
0:58 LeTourneau K-8 Blade
2:06 Engine/ Power
2:46 Cab/ Controls
4:31 Cable Control Unit
6:09 WWII Role/ Weight
6:34 Improvements/ Conclusion History
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That lever that you said turned the pony motor over is actually the decompression lever. On that dozer you would turn the pony motor over from the front of the tractor with an old school crank. The purpose of the decomp lever is to allow the pony motor to spin the diesel without having the strain of the full compression from the diesels cylinders. You turn the decomp off once the diesel is hot enough and intern the diesel is able to turn over under its own power.
This video just goes to show how simple, informative and well spoken narration can be far superior to fancy editing, musical scores and complex camera angles when creating an entertaining and quality youtube video about almost any given subject.
That's a top-notch video. I think I learned more in that time than I've learned in almost all UA-cam videos I've seen, combined. An old boy who field serviced RD8s before the war recently told me how operators would clean the clutch on the fly with Pyrene extinguishers when the disc got oiled down.
Your welcome, and thanks for the additional history!
Thank you! Cool! Talking with any old timers or mechanics/operators that worked on these machines is one of the best ways to learn about the reliability and performance of that machine because those are the guys who know these machines in and out.
Nice mini-documentery. Thanks.
Really enjoyed this documentary,as well as all your other ones...thanks for putting this up!
Very informative! Great job! Thanks for posting
Very cool and informative!
You did a fine job very informative video.
Excellent narration, I grew up around these machines.
Interesting and informative - thanks.
We had a '37 D7 with the blade on the farm, my uncle used it in his teens.. and I'm sure it was used to build the dam to create the lake we still have. Sadly, it got cut up when scrap prices skyrocketed several years ago. It would have been a sweet project. I did manage to get the pony motor running back in the 90s.
Very informative. I used one of these on Christmas Island (British Army) 1960. That one had Birtley hydraulics. Built a very strong arm with the 90lb pull on the clutch :) It will still be there!
Replaced around that time by the D8H.
An interesting machine,thanks for uploading
very nice explanation of how the machine works ,, I would love to see this machine working
it looked to me like it's been there for quite a number of years
Yes you cover the story , most excellent sir , sure took a good operator to get the best from these machines! I have No 1914 left factory 28 August 1943 stamped SP (special plant) it has a D8n series Hyster winch apparently to US 7th fleet. Many were used for tank recovery some even fitted with bullet shield protection. NZ govt used my machine while making Nandi Airport in Fiji Then NZ army sold to demolition firm RYANS in Christchurch then Cameron now me! it has developed part of a small farm in canterbury .Still operational she winched our "retirement" house on transporter into position on the worst rainstorm for 2 years. sure glad to have her. Thanks Buddy
+Richard Bruce - "SP" in the serial number stands for "Special Parts" - i.e., additional accessories and non-standard components added to the tractor during factory assembly - as compared to accessories or attachments added after the tractor left the factory.
Typically, these "Special Parts" were non-standard governors, non-standard track shoes, heavy duty battery charging systems, factory lighting, military-standard oil filters, and non-standard transmission or final drive gearing.
Cat D6's, D7's and D8's with special transmissions were marked "SPC-G" on the upper rear vertical surface of the steering clutch housing.
Tractors fitted with wide gauge tracks had "W" in the Serial Number prefix.
If the tractor was Wide Gauge and also had non-standard factory additions, it had "WSP" in the Serial Number.
The use of "SP" in the Serial Number was discontinued during December 1945 - except for tractors having "special" (non-standard) transmission or final drive gears.
Refer to the Caterpillar Service Magazines, Feb 19,1940 and Feb 20, 1941, and December 15, 1945.
Thanks D357,I understand1914 my machine left factory(peoria) 28 aug 1943 for US 7 Fleet
holy crap, that was a great historical rundown, keep this up, I learned a lot from this short video.
wow I'm blown away by your knowledge of heavy equipment. well done my friend. you just earned my subscription.
+aaron rad Thank you! Glad you enjoy my videos and thanks for joining!
Great video. If you ever what to make a video about a 1H series D8, I know where there is one sitting in western PA.
Very nice vid. Well spoken.. Much respect sir...
+MetalTeamster Thank you. Glad you enjoyed the presentation.
Like Aaron said your precision knowledge deserves a follow, simply brilliant. Nice to see this machine in the hands of a collector.
+0BMM1 Thank you! Glad you enjoyed the presentation
+PAmining I'm sure the 2u didn't get an oil clutch,but the 13a,14a and 15a did.also.a live cable unit,not depending on the clutch being in to work,was added.the diesel fuel torque converter was in the 15a but one needed to keep the tank at least half full or it would run hot.Ive got a 15a soon for sale.even has segmented sprockets.
Awesome video bro I really enjoy u content
that machine deserves a restoration
I've seen your episodes and i like them. Your voice matches heavy machinery narration well. Thanks 🚜👍
Thank you, I'm glad you enjoy the videos!
Thanks for the video
Your welcome
@UnitCrane514 Haha, the reason I thought that was because on the D8E I was on, the hand lever exactly like this one was used to turn the pony over. And thanks, there will be lots more coming up! Have you joined our Facebook? You can stay up to date with updates on new equipment we're locating, researching and in the process of filming!
I had a chance to see the 8R in action last weekend in Conneaut OH. At the D-Day event.
esquad 540 I used to run one of these 8Rs for a daily occupation. After that the 2U was a welcome relief. That shifter was a nightmare if you ever got into a bind. Ultimately the power shift was the only way to go. But the nostalgia was nice.
Just a further comment, when these dozers were pulling scrappers the blade would be dropped off and the blade cable directed to the rear because the scrapper needed two cable drums to operate it, one to drop the belly down to scrape up the load and the other to pull forward the ejector plate to push the load out. I loved to listen to these machines work because the cable drum brakes and clutches would make a whoop whoop sound that could heard for miles. Thank you
@PAmining good work on the the videos keep them up
Very good
that handle he said was to start the pony is the compression release for the big motor.this had a 5 and three quarter inch piston.the d7 in this era was the same bore and stroke but a 4 cyl.the mains and rod bearings were also the same.I believe the journal dimeter was 4 inches but I cant remember if this was the mains or rods.
Lee Watkins you are correct !
Transmission and engine tune up, ready to go for another 10 years! Good ol' CAT!
thats nice to see thats its getting a buyer. In my town there used to be in 19255 about 90 -100 team shovels and 90ft talll draglines
Educational!!! this Cat is begging to be restored.
good docos ive watchd a few
very good info I like old dozzers and craines ect
@frmerrin2 I'm pretty sure the machine was parked sometime during the 1970s.
Good video. Looks surprisingly intact - especially the tracks - until you see the seat, and the fact that the injector pipes are all missing. Still though, could be a good restoration project for someone.
wow I have been dozer schooled!
Hope you can do another after they finish fixer 'er up!
@jix177 Thanks. The machine is patrolled by the owner, so I'm sure he does a good job at keeping vandals away for the most part.
Really good video, good information. I hope that someday it gets restored, looks fairly complete, but whoever does it will have their work cut out for them.
Thank You Very well explained.Is that a bell on the side of the seat?
On the one side of the operators seat, it looked like there was a bell mounted to it, is that what it is and if so what would it be used for?
100+ HP was a massive amount of power in the 40s. Consider that the first wheeled tractor to break the 100hp barrier was in 1963
@tractortom401 Yeah I'm glad to see that it's not getting the torch. And with some TLC, she'll look and run like brand new!
is that a bell on the side of the armrest?
@JonesDieselPerforman Your welcome!
@PAmining: Get in the game bro! Im 15 and I know this stuff...I researched pony motor start Cats for a LONG time thats why I know lol. Put some updates up on this dozer, and MORE WALK AROUNDS! I love learning about this old shit!
A few people have asked, and no reply yet, so I will ask again.
What is with the bell on the side of the drivers seat?
Always enjoy your videos. Thank you for posting them.
@gangesexcavating Thank you!
Is that a running candidate?
I think mine was a 2U, but I coulda swore it was a dry clutch though.
Mine had a rops, extra rear winch, 2 seats, also the blade angle was manually adjustable
Start them!
@UnitCrane514 Ok thanks!
Very nice presentation! Any chance of fixing this machine and getting it to run again?
That's my question too! It would be very cool to see her run again.
Facts are nice but start that bad boyy up!
if it could. wouldn't be surprised if it was almost rusted solid.
@PAmining when she does make a vid of it if you can
The Tractor that helped win the Pacific War during WW2.
@Mcapple94 Yep they don't build them like they built these babies anymore!
Thanks for an A+ video. Related trivia: During WWII, hydraulics were a protected, strategic technology. Application of hydraulics to aircraft elevators on carriers created an advantage over the Japanese, who were still using slower screw jacks. Before the war, the stage at Radio City Music Hall was renovated, using state of the art hydraulics. It could raise, lower, tilt and spin. Military guards were stationed under the stage for the duration of the war, to protect the technology from spys.
@snooptravytrav Thanks
Did the new owner take it yet, hope to see a running video. Theres one sitting at a abandoned gravel pit in Wisconsin that is now D&R property and they refuse to let me remove it for restoration, claiming I would destroy habitat if I went in with a low boy on the gravel road ???????? Love Your Videos Keep Them Coming.
+farmerphil what about a goose-neck trailer and take it out one piece at a time?
Great vid, thank you :) do you plan to restore her?
that looks like a gear drive Bosch
@jeremylee99100 Thanks
Restore it!!!!
Thats not for the pony motor it is compresion rellease fo big motor
D7 and D8s also had a hi lo transmissin on the starting engine
I bet this ojd girl could tell some stories.