Greg Rider Posted December 2, 2008 Share Posted December 2, 2008 Check out new pics in my gallery. This was sitting at LTV steel in Cleveland a few years back. It never goes on the road,just around the plant. Trailer says "CAP 220,000 lbs". I parked my Furd F450 Stupid Duty next to it to get an idea of the size. Quote #1 on A-model registryIf I drink because of work, why can't I drink at work? Link to comment https://www.bigmacktrucks.com/topic/6251-big-r-model/ Share on other sites More sharing options...
Lmackattack Posted December 2, 2008 Share Posted December 2, 2008 I think they call those a RM some of the heavyest built R model macks popular in mines and logging fields V8 engines and heavy heavy rears! Quote Link to comment https://www.bigmacktrucks.com/topic/6251-big-r-model/#findComment-25753 Share on other sites More sharing options...
David Posted December 2, 2008 Share Posted December 2, 2008 Looks like a RD800. Quote Link to comment https://www.bigmacktrucks.com/topic/6251-big-r-model/#findComment-25782 Share on other sites More sharing options...
fjh Posted December 2, 2008 Share Posted December 2, 2008 Looks like a RD800.Agreed Quote Link to comment https://www.bigmacktrucks.com/topic/6251-big-r-model/#findComment-25794 Share on other sites More sharing options...
ThaddeusW Posted December 2, 2008 Share Posted December 2, 2008 Did that truck happen to have the eight spoke 80K rears? Looks like it has 14.00R24 rubber. I think they call those a RM some of the heavyest built R model macks popular in mines and logging fields V8 engines and heavy heavy rears!Trent, The RM was the all wheel drive set back axle R that was usually setup for snow plowing. The M supposedly stands for municipal. There a a bunch on truck paper including a 6x6 RM tractor. I also believe the steel hoods were standard. Quote -Thad What America needs is less bull and more Bulldog! Link to comment https://www.bigmacktrucks.com/topic/6251-big-r-model/#findComment-25795 Share on other sites More sharing options...
David Posted December 2, 2008 Share Posted December 2, 2008 Not all RM's were all wheel drive, but they were all set back axles. From the front you can tell the difference between the RD800 and others by the number of round bars in the grill. The RD800 had 6 and the RM, DM600, DM800, R600 and HMM only had 5. Quote Link to comment https://www.bigmacktrucks.com/topic/6251-big-r-model/#findComment-25819 Share on other sites More sharing options...
bulldog man Posted December 13, 2008 Share Posted December 13, 2008 Looks like a RD 800 later Quote You Cant Fix Stupid. But You Can Numb It With A Sledgehammer. Link to comment https://www.bigmacktrucks.com/topic/6251-big-r-model/#findComment-26991 Share on other sites More sharing options...
jeffbyrne Posted December 20, 2008 Share Posted December 20, 2008 Did that truck happen to have the eight spoke 80K rears? Looks like it has 14.00R24 rubber. Trent, The RM was the all wheel drive set back axle R that was usually setup for snow plowing. The M supposedly stands for municipal. There a a bunch on truck paper including a 6x6 RM tractor. I also believe the steel hoods were standard. Hi Thad, a 4x4 or a 6x6 Mack is denoted in the model # after the engines type #, i.e. RM686 6 or 4 SX , so an RM686SX is only bogie drive, whereas an RM6866SX would be a 6x6. Regards Jeffro. Quote Link to comment https://www.bigmacktrucks.com/topic/6251-big-r-model/#findComment-27639 Share on other sites More sharing options...
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