b61fred Posted July 1, 2009 Share Posted July 1, 2009 I have a old r-600 truck, It originaly had a mack 6 cylinder, I was wondering how much work is it to change to a cummins engine? I just happen to have a cummins 270 laying around and thought I could wring the last bit of life out of both the truck and the engine. ThanksFred Quote 15 gears...no waiting! Link to comment https://www.bigmacktrucks.com/topic/9926-r-600-with-cummins-engine/ Share on other sites More sharing options...
Bollweevil Posted July 1, 2009 Share Posted July 1, 2009 Measure from the end of the flywheel housing to the radiator core, to get an idea of how much room you have. Then measure the Cummins from flywheel housing to fan. It might be possible to move the radiator forward a couple of inches or the trans back 3 or 4 inches. Having room for it only matters when you consider how bad you want to do it. Possibilities are unlimited, for a creative mind. Quote Link to comment https://www.bigmacktrucks.com/topic/9926-r-600-with-cummins-engine/#findComment-37544 Share on other sites More sharing options...
David Posted July 1, 2009 Share Posted July 1, 2009 I have two almost identical MH612's. One has a Mack the other a Cummins. The one with the Cummins has the transmission set 5 inchs futher to the rear than the one with the mack. Quote Link to comment https://www.bigmacktrucks.com/topic/9926-r-600-with-cummins-engine/#findComment-37546 Share on other sites More sharing options...
Superdog Posted July 2, 2009 Share Posted July 2, 2009 I have two almost identical MH612's. One has a Mack the other a Cummins. The one with the Cummins has the transmission set 5 inchs futher to the rear than the one with the mack.That's why Cummins engines were only put in the R700's. Quote Link to comment https://www.bigmacktrucks.com/topic/9926-r-600-with-cummins-engine/#findComment-37583 Share on other sites More sharing options...
b61fred Posted July 2, 2009 Author Share Posted July 2, 2009 well that explains it. I figured it would be difficult, I hate to put the r-600 out to pasture.. I will figure something out.Fred Quote 15 gears...no waiting! Link to comment https://www.bigmacktrucks.com/topic/9926-r-600-with-cummins-engine/#findComment-37585 Share on other sites More sharing options...
David Posted July 2, 2009 Share Posted July 2, 2009 That's why Cummins engines were only put in the R700's.I would think the engine would hit the firewall on a R700. Quote Link to comment https://www.bigmacktrucks.com/topic/9926-r-600-with-cummins-engine/#findComment-37587 Share on other sites More sharing options...
Rob Posted July 2, 2009 Share Posted July 2, 2009 I would think the engine would hit the firewall on a R700.Naw, there is a couple of inches available back there but it is tight all the same.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/9926-r-600-with-cummins-engine/#findComment-37589 Share on other sites More sharing options...
Bollweevil Posted July 2, 2009 Share Posted July 2, 2009 well that explains it. I figured it would be difficult, I hate to put the r-600 out to pasture.. I will figure something out.FredAre you giving up this easy? Say it ain't so. Go to the video store and rent Maj. Payne. Listen to the part about the little engine that could. Quote Link to comment https://www.bigmacktrucks.com/topic/9926-r-600-with-cummins-engine/#findComment-37592 Share on other sites More sharing options...
Rob Posted July 2, 2009 Share Posted July 2, 2009 Are you giving up this easy? Say it ain't so. Go to the video store and rent Maj. Payne. Listen to the part about the little engine that could.I liked the kitchen sink idea for a doghouse on the car hauler project. Pretty much ready made for that application. Going with a Cummins in a 600 series truck is going to be tight inside the cab and I think the shift levers would need to be relocated to the rear more. Can't see how that would be comfortable to shift. I'd prolly opt for a 673 as you most likely don't need to go noplace fast anyway in a dump truck. Especially if used for site duty, or short runs primarily.Rob Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment https://www.bigmacktrucks.com/topic/9926-r-600-with-cummins-engine/#findComment-37594 Share on other sites More sharing options...
David Posted July 2, 2009 Share Posted July 2, 2009 I would think the engine would hit the firewall on a R700.I ment to say R600. Quote Link to comment https://www.bigmacktrucks.com/topic/9926-r-600-with-cummins-engine/#findComment-37648 Share on other sites More sharing options...
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