Big Dig 2010 - 1968 Cat D7E - 5/22/2010
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- Опубліковано 12 жов 2024
- The R&GVRRM is starting the excavation for the third phase of our new railroad storage siding west of the Livonia, Avon & Lakeville Railroad which will add another 150+ feet of track to the almost 400 feet of track currently installed. Before more track can be installed, the museum needs to bring the new portion down to grade, and the R&GVRRM does this work in house with its own heavy equipment.
On this day, the museum's Bucryus-Erie 20-H hydraulic excavator works along side the museum's 1968 Cat D7E dozer which we feature in this video. Our D7E was purchased as surplus from the U.S. Military with a bad engine in 2001. The museum replaced the 6-cylinder engine with a running take-out donated from another D7E. The museum then repainted and relettered the unit in 2002 back to its Cat yellow color from the camo it wore during its military service. This dozer has been the backbone of our heavy earthmoving equipment ever since.
We hope you enjoy the video. We are always looking for new people to come out to volunteer and maintain and operate our heavy equipment. Interested? Please check out our website linked from the banner at the top of the page. Donations are also always welcome to help us keep these machines running.
Same 14 litre 4 cylinder turbo motor as my 17a. Flat stick at 1100 rpm. These were the first of the torque converters and they did give a bit of trouble, that's why they went on to the higher revin 3306 motor. Torque converters like to spin a bit quicker. The higher the rpm, the less strain on components. I reckon the big 4 with the turbo whistling away is the nicest sounding motor on the planet. You can hear the turbo on mine from over a mile away. Not the engine sound, just the turbo and ya can see a big cloud of black smoke. These things will still keep pushin right down to almost stall point and you can hear each piston firing. Ya can also hear the turbo whistle stop and start when ya revs drop right down when they're lugging. One of the best dozers Cat ever made these E series D7. Great vid mate , thanks for posting.
Same basic engine, nearly 2 times the HP of a 17A. By today's standards all the old machines had short engine life. At that HP rating, those engines were way past their designed output. Head gasket failure and counterbore fretting/cracking of cylinder blocks was common. I don't know what "flat stick" means.
If you need a replacement motor, just take your torch and cut two cylinders off of a 46A motor Voila!!😅😅
Beautiful sound !!!! Listen to the turbo whine...
Ah yeah,old school Cat turbo whistle ! Going into favorites .
Dont know if you guys gives a damn but if you are bored like me during the covid times you can stream all the latest movies on InstaFlixxer. Have been binge watching with my gf for the last few days =)
@Cash Major Definitely, I have been using instaflixxer for since november myself :D
love that sound
Sounds way better than the D7F we have at work that has the 3306 that screams.
To be perfectly correct, the D7F used a D333 engine, not 3306. The D7G used a 3306, bigger bore, 4 3/4 VS 4 1/2, different fuel system. I know, I'm a nerd but I worked 40 years in the repair trade, loved every minute of it. The sound of those old engines still give me goosebumps..
My beginner days, 17A, D7E, and D7F!! Retired after D9T with backup camera, my neck finally said Thank You😅
D7E 48A series had the 4 cyl D339 engine not a 6 cyl but, coming from the military it would have a totally different serial prefex number then the civilian machine, and could have anything in it for an engine.
I believe the military model was serial 68A. High horsepower direct electric starting.
D339 isa D342 with two cylinders chopped off
does this guy run dozer all day because he has ear protection
Hi im after a manual for one of these like the catipilla service manual :) can you hook me up Thanks
should only have a 4 cyl engine in it if its a D7E they didnt have a 6 cyl
EX MILITARY TOO
I heard they were much stronger than the 3306 engines
And way cheaper to run.