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  #21  
Old 01-10-2019, 11:36 PM
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Originally Posted by SmokinDodge View Post
And left and right hand crank rotation as well.
I don't know much about those engines but haven't they been phased out and replaced for better more economical engines....
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  #22  
Old 01-11-2019, 03:39 AM
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Originally Posted by terry lingle View Post
The engine design is so versatile that they can be assembled such that there are no parts on the side of each engine that is not accessible.

.
Remember that the blower presurised the base and combustion air enters the cylinders through ports in the cylinder walls when the piston was transitioning BDC.
This pressurized base is why the engines blow oil through seals and out the air box drains.
later engines had turbochargers added for still more power.


In fact it was and I believe still remains the most versatile engine ever designed.


My service truck had the turbo on the 4-53, I used to work on Blah Knox paving machines that had Detroit power plants.

I absolutely agree with you about being versatile. Put them together in just about any configuration needed...
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  #23  
Old 01-11-2019, 05:15 AM
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Originally Posted by terry lingle View Post
...In fact it was and I believe still remains the most versatile engine ever designed...
Versatile but noisy.........in a good way. Nothing like the sound of a Jimmy cranked right up to raise the hair on the back of your neck--at least if you're mechanically inclined.

Back in '73/'74 I spent the better part of a year running an almost new Cat 966C in a small local pit. Most of the time was spent loading out pit run gravel but for about three months in the summer the owner brought in a crusher and we made 3/4 minus road mulch.

My job was to load trucks and feed the crusher and when we first started the crusher was real close to the bank so I was able to keep up. As the distance to the bank increased it got harder to keep everything going and, since the crusher took precedence, trucks were waiting longer and longer to load. Drivers didn't like that since they were getting paid by the ton, not by the hour.

To get things back on track the owner brought in a big ol' Detroit powered Michigan loader. I can't remember the model but it seems to me it was about the same size as the 966 and didn't articulate--and oh boy, was it a beast to drive. I mostly ran the 966 but once in a while the boss would get me to run the Michigan to spell the other driver off.

Man did I hate that thing! It was noisy, the transmission was awkward to shift, it barely had any power steering and the turning radius was huge! After running the 966 with its power shift transmission, tight turning radius and fingertip steering stepping into the Michigan was a real bummer. I could run the 966 for 10 hours and finish the day feeling pretty good but an 8 hour shift on the Michigan left me absolutely beat to hell. I'm glad I only had to run it once in a while.

The Michigan was also very slow. As the bank got further and further away from the crusher--we probably should have moved it but the owner didn't want to do that--the Michigan got so it could barely keep up and I found myself occasionally having to help out on the crusher anyway. Things got even more complicated when we ran into a seam of really heavy clay that was too wet and sticky to make road mulch--about every second bucket load had to be dumped way off to one side to get it out of the way.

Things got so bad that the owner finally broke down and found a nice Cat 988 loader to feed the crusher and things got better real quick. Even though the 988 was technically "slower" than the 966 it had no trouble keeping up. Its bucket was about two yards bigger than the 966 so what it lost in speed it made up for in capacity. In spite of its size I always considered the 966 to be quite "agile" while the 988 was more of a "plodder".
It just kinda lumbered along. It never seemed as fast but it could dig--breakout force was phenomenal. It seemed like you could lift up the whole bank and you always pulled out with a heaping loaded bucket. I never minded trading off after that--it was a nice change...
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  #24  
Old 01-11-2019, 06:57 AM
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I don't know much about those engines but haven't they been phased out and replaced for better more economical engines....
The same people killed them that killed the big block cars of the sixities. EPA

Not bad engines, no torque like a four stroke but what they lacked in torque they made up for with a beautiful, beautiful noise.
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  #25  
Old 01-11-2019, 07:33 PM
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Originally Posted by SmokinDodge View Post

Not bad engines, no torque like a four stroke but what they lacked in torque they made up for with a beautiful, beautiful noise.
EPA-Extra Pain, Ass....

When I was with Sully-miller and wrenching on pavers we had one up on the ramps doing a total in frame engine build.
We R&Rd the liners and got it running just as it was getting dark. The lead mech ran the rack and said light it up. We hadn't put the exhaust manifold on yet but she lit just fine.

Talk about a show...blue fire shootin out the ports and a good healthy bark. Pretty impressive to me, I was 20 or so and that was awesome....
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  #26  
Old 01-11-2019, 08:13 PM
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Originally Posted by LKeithR View Post

Things got so bad that the owner finally broke down and found a nice Cat 988 loader to feed the crusher and things got better real quick. Even though the 988 was technically "slower" than the 966 it had no trouble keeping up. Its bucket was about two yards bigger than the 966 so what it lost in speed it made up for in capacity. In spite of its size I always considered the 966 to be quite "agile" while the 988 was more of a "plodder".
It just kinda lumbered along. It never seemed as fast but it could dig--breakout force was phenomenal. It seemed like you could lift up the whole bank and you always pulled out with a heaping loaded bucket. I never minded trading off after that--it was a nice change...
I was working for E.L.Yeager in SoCal and was on a freeway reconstruction project. We had a couple of 980 Cats and one 992. I had messed around with the 980s some, not working with them, mostly working on them and just moving yard crap around.

On my last night there we were staging all the yellow iron for the move trucks due the next day and I went to go get the 992. I had never even climbed up on it before but I was the only one there, it was 2 in the morning and it needed moved.

Where it was, it was right next to this huge pile of debris, broken concrete, chunks of asphalt, rocks, whatever. This pile was huge, like 30 foot across and maybe 20 foot tall. I remember sitting in the cab with the heater on, trying to thaw my hands and warm the beast up and looking at this pile that was as tall as this huge machine I was in and wondering if I could move it any....

At pretty much an idle I kept the bucket just off the ground and let it just run into the pile till it stopped, the bucket about halfway in. I goosed it pretty good, maybe 3/4 throttle and immediately let off.

That monster moved the whole damn pile! I was pretty dang surprised, very impressed and a little bit nervous. There were a lot of homeless folks and shady characters around and I was seriously worried someone may have been in the pile.

I backed out about a dozen feet or so and climbed down to check. I most always wore my .357 S&W when I was on freeway jobs so I wasn't too worried about me, I just had to make sure I hadn't squashed anyone. After a look around I drove that 992 to where I wanted it, secured all and left for home...

That was the one and only time I drove a 992, and it was almost new and had a fully enclosed cab with no broken windows.

It was awesome in its power, especially considering you could barely hear it running. I think my truck was louder than that beast was....
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  #27  
Old 01-11-2019, 09:21 PM
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In my 25 years in the field, I have worked around screaming jimmies from 2-53 to 8v135? And 16v71s. The double bank of 6-71s was one of the more popular pump drives.

Plus side, high power to weight, easy to work on, cheap, versatile (once you get past the narrow torque band issues.

Down side, noisy, dirty, oil leaking mofos, narrow torque band.

I came to truly appreciate Cat power. Cummins was not popular for stationary power, but very popular for over the road applications.
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  #28  
Old 01-11-2019, 10:48 PM
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Originally Posted by camdigger View Post
I came to truly appreciate Cat power. Cummins was not popular for stationary power, but very popular for over the road applications.
Back when cat had a superior governor when dealing with fixed rpm/Ag/power unit over a mechanical Cummins. Cummins gov. By design had a hard time taking intermittent loads or varying loads. It was hell trying to hold a truck at 1,000 rpm to unload with a pto. They had several attempts to work around it, none were successful until full electronic engine control came to the market. By then folks were already used to using anything other than a Cummins.

The larger fracking rigs (some)use multiples of the larger (60 liter) Cummins to power the pumps. There was a deal back when diesel was higher dollar than a giraffes eyebrow that they were using some nat gas to supplement the fuel by running a hose into the intake and giving it a whiff. That caused the ecm all kinds of griefs.....
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  #29  
Old 01-12-2019, 07:12 AM
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Originally Posted by cutter View Post
I despise seeing anything tortured "for the fun of it".
People like that are as likely as not to move on to dogs or cows.

Having spent my entire life fixing and building things I simply I don't have a sense of fellowship with those who enjoy destruction. I'm glad to see some sensible responses to the video and that I have not joined the wrong forum.
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  #30  
Old 01-12-2019, 08:12 AM
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Originally Posted by Shade Tree Welder View Post
We need to get these guys on SFT!!!

https://youtu.be/JxLb3Yqqds4
I think you are right. The only thing they could have done better, was to dump a 2 pound bag of 1/4" nuts down the air intake at full throttle.
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