Popular Post Joseph Cummings Posted November 25, 2024 Popular Post Share Posted November 25, 2024 (edited) Famous truck in the Kentucky Coalfields. Crazy Big Cat power. I seem to remember it being a 3500 series industrial. The last I heard it was in pieces in MMI's yard Edit, it's a 3412 cat Edited April 13 by Joseph Cummings 6 Quote Link to comment https://www.bigmacktrucks.com/topic/74797-mining-machinery-inc-rd800-cat-powered/ Share on other sites More sharing options...
tjc transport Posted November 25, 2024 Share Posted November 25, 2024 i like the "little" lift block on the pickup plate of the gooseneck. Quote when you are up to your armpits in alligators, it is hard to remember you only came in to drain the swamp.. Link to comment https://www.bigmacktrucks.com/topic/74797-mining-machinery-inc-rd800-cat-powered/#findComment-562632 Share on other sites More sharing options...
Popular Post Joseph Cummings Posted November 25, 2024 Author Popular Post Share Posted November 25, 2024 On 11/25/2024 at 10:55 PM, tjc transport said: i like the "little" lift block on the pickup plate of the gooseneck. Expand It's adjustable, if it's like the ones I used it's hydraulic. It probably uses the Fifth wheel that takes the large pin. Or like some I've pulled the pins were swappable. I think that orange DM800 that has the Bethlehem Steel on the door has the big fifth wheel on it, or at least it did when it worked at the mill. McHugh sometimes used one of these Cline Prime Movers that they built from off road dumps to pull trailers like that with the tall gooseneck 3 Quote Link to comment https://www.bigmacktrucks.com/topic/74797-mining-machinery-inc-rd800-cat-powered/#findComment-562638 Share on other sites More sharing options...
Popular Post Joseph Cummings Posted November 25, 2024 Author Popular Post Share Posted November 25, 2024 I just checked, it had a Cat 3412 engine in it. The story is that they wanted Carter Machinery to install it, and Carter refused, so they did it in their own shop. Carter Machinery is a super huge Cat dealer in that area 4 Quote Link to comment https://www.bigmacktrucks.com/topic/74797-mining-machinery-inc-rd800-cat-powered/#findComment-562640 Share on other sites More sharing options...
Mark T Posted November 26, 2024 Share Posted November 26, 2024 I'm like'n that Autocar with the scream'n demon. They're some pretty cool trucks. Thanks for posting. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74797-mining-machinery-inc-rd800-cat-powered/#findComment-562644 Share on other sites More sharing options...
Joseph Cummings Posted November 26, 2024 Author Share Posted November 26, 2024 On 11/26/2024 at 12:41 AM, Mark T said: I'm like'n that Autocar with the scream'n demon. They're some pretty cool trucks. Thanks for posting. Expand I took their 4 axle autocar and a 4 axle Rogers to Parkersburg WV to pick up a Tadano Mantis back back in about 1986. Not too long after leaving Parkersburg I was using the jakes and the elbow blew out right below the muffler. Talk about screaming. By the time I got home my ears rang for a week 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74797-mining-machinery-inc-rd800-cat-powered/#findComment-562655 Share on other sites More sharing options...
The Heinz Posted November 26, 2024 Share Posted November 26, 2024 The 3412 is a beast of an engine for that Bulldog! Shame it's in pieces, I'd love some videos of that beast running. It's like the American equivalent to the last Pacific truck ever made, a P12W3 with a 3412 Cat, built in the parts warehouse. Some interesting videos of the truck being tested after completion on Youtube. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/74797-mining-machinery-inc-rd800-cat-powered/#findComment-562663 Share on other sites More sharing options...
Joseph Cummings Posted November 26, 2024 Author Share Posted November 26, 2024 On 11/26/2024 at 12:49 PM, The Heinz said: The 3412 is a beast of an engine for that Bulldog! Shame it's in pieces, I'd love some videos of that beast running. It's like the American equivalent to the last Pacific truck ever made, a P12W3 with a 3412 Cat, built in the parts warehouse. Some interesting videos of the truck being tested after completion on Youtube. Expand I'm really surprised they got enough cooling under the hood of a RD800 for a 3412. Every 3412 I've ever seen has a huge radiator 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74797-mining-machinery-inc-rd800-cat-powered/#findComment-562674 Share on other sites More sharing options...
Mark T Posted November 26, 2024 Share Posted November 26, 2024 I almost looks like it has 4 electric fans in front of the radiator in the picture. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74797-mining-machinery-inc-rd800-cat-powered/#findComment-562686 Share on other sites More sharing options...
Joseph Cummings Posted November 26, 2024 Author Share Posted November 26, 2024 On 11/26/2024 at 9:26 PM, Mark T said: I almost looks like it has 4 electric fans in front of the radiator in the picture. Expand Yeah I blew the picture up and it does look like fans. I'd love to see under the hood Quote Link to comment https://www.bigmacktrucks.com/topic/74797-mining-machinery-inc-rd800-cat-powered/#findComment-562691 Share on other sites More sharing options...
Popular Post Mark T Posted November 27, 2024 Popular Post Share Posted November 27, 2024 I'd love to have the view over the hood 3 Quote Link to comment https://www.bigmacktrucks.com/topic/74797-mining-machinery-inc-rd800-cat-powered/#findComment-562711 Share on other sites More sharing options...
Global Guru Posted April 16 Share Posted April 16 What drive train was used? I’d think the clutch, transmission and rear end would be overloaded by a 3412. Quote Link to comment https://www.bigmacktrucks.com/topic/74797-mining-machinery-inc-rd800-cat-powered/#findComment-573775 Share on other sites More sharing options...
Red Horse Posted April 16 Share Posted April 16 On 4/16/2025 at 2:03 AM, Global Guru said: What drive train was used? I’d think the clutch, transmission and rear end would be overloaded by a 3412. Expand Agree. I just discovered this thread because of your post. I would imagine it had some sort of "slush box" of some sort out of an MX Mack or some other off road truck. Quote Link to comment https://www.bigmacktrucks.com/topic/74797-mining-machinery-inc-rd800-cat-powered/#findComment-573801 Share on other sites More sharing options...
Joseph Cummings Posted April 16 Author Share Posted April 16 (edited) On 4/16/2025 at 3:13 PM, Red Horse said: Agree. I just discovered this thread because of your post. I would imagine it had some sort of "slush box" of some sort out of an MX Mack or some other off road truck. Expand Yeah I was thinking maybe like an Allison 6000 Series https://allisontransmission.bynder.com/m/348dc917b2c1df66/original/Vocational-Model-Guide.pdf Edited April 16 by Joseph Cummings Quote Link to comment https://www.bigmacktrucks.com/topic/74797-mining-machinery-inc-rd800-cat-powered/#findComment-573802 Share on other sites More sharing options...
Red Horse Posted April 16 Share Posted April 16 On 4/16/2025 at 4:02 PM, Joseph Cummings said: Yeah I was thinking maybe like an Allison 6000 Series https://allisontransmission.bynder.com/m/348dc917b2c1df66/original/Vocational-Model-Guide.pdf Expand That should work- imagine it would be a tight fit😎 Quote Link to comment https://www.bigmacktrucks.com/topic/74797-mining-machinery-inc-rd800-cat-powered/#findComment-573804 Share on other sites More sharing options...
Joseph Cummings Posted April 16 Author Share Posted April 16 https://www.google.com/maps/place/1512+N+Big+Run+Rd,+Ashland,+KY+41102/@38.3698068,-82.7083924,592m/data=!3m1!1e3!4m6!3m5!1s0x8845d9bba8825649:0x7e17cd5d1c81d9e6!8m2!3d38.3704013!4d-82.7052248!16s%2Fg%2F11c1ck3d10?entry=ttu&g_ep=EgoyMDI1MDQxMy4wIKXMDSoASAFQAw%3D%3D Quote Link to comment https://www.bigmacktrucks.com/topic/74797-mining-machinery-inc-rd800-cat-powered/#findComment-573806 Share on other sites More sharing options...
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