r600 Posted February 13, 2009 Share Posted February 13, 2009 can anyone tell me what r685rst stands for??thanks adrian Quote Link to comment https://www.bigmacktrucks.com/topic/8325-what-does-r685rst-mean/ Share on other sites More sharing options...
Rob Posted February 13, 2009 Share Posted February 13, 2009 can anyone tell me what r685rst stands for??thanks adrianHi Adrian, that is for an R686 Mack tandem drive tractor with a steering wheel on the right side of the cab; (Australian etc..) It should have been powered with either an ENDT676 Maxidyne, or 300+ Mack engine with a five, or six speed Maxitorqe transmission as built. This of course depends on date of manufacture.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/8325-what-does-r685rst-mean/#findComment-30747 Share on other sites More sharing options...
Superdog Posted February 13, 2009 Share Posted February 13, 2009 Hi Adrian, that is for an R686 Mack tandem drive tractor with a steering wheel on the right side of the cab; (Australian etc..) It should have been powered with either an ENDT676 Maxidyne, or 300+ Mack engine with a five, or six speed Maxitorqe transmission as built. This of course depends on date of manufacture.RobThe R685RST would have the ENDT675 Maxidyne,237 hp. Quote Link to comment https://www.bigmacktrucks.com/topic/8325-what-does-r685rst-mean/#findComment-30751 Share on other sites More sharing options...
r600 Posted February 13, 2009 Author Share Posted February 13, 2009 hey rob,is r686 the same as r685??my engine is endt675 and the built date 1976,thanks(ps hope your feeling better)adrian Quote Link to comment https://www.bigmacktrucks.com/topic/8325-what-does-r685rst-mean/#findComment-30752 Share on other sites More sharing options...
r600 Posted February 13, 2009 Author Share Posted February 13, 2009 hey rob,is r686 the same as r685??my engine is endt675 and the built date 1976,thanks(ps hope your feeling better)adrianyour on the ball superdog,does the rst mean anything special its only got 34,000 backend though it maybe light duty??? Quote Link to comment https://www.bigmacktrucks.com/topic/8325-what-does-r685rst-mean/#findComment-30753 Share on other sites More sharing options...
mackkid Posted February 13, 2009 Share Posted February 13, 2009 Hi AdrianR is the model 6 denotes the GVM 20884 to 27240 kg85 in your case is the endt/b 675 237 hp maxidynein later models it was the em6The 686 were the cool power enginesR Right hand driveSt is bogie drive light weight thus your 34ooolbs rearsWhat ratio are they 4.17s maybe?The 34000 lb bogie also came out with aluminium carriers as a lighter tare option Transmissions were 5 speed with the two stick 6 speed 10 and 12 speed air shift as optionssteve Quote Link to comment https://www.bigmacktrucks.com/topic/8325-what-does-r685rst-mean/#findComment-30758 Share on other sites More sharing options...
Rob Posted February 14, 2009 Share Posted February 14, 2009 The R685RST would have the ENDT675 Maxidyne,237 hp.You are correct. I read it wrong.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/8325-what-does-r685rst-mean/#findComment-30775 Share on other sites More sharing options...
other dog Posted February 14, 2009 Share Posted February 14, 2009 You are correct. I read it wrong.Robyour clutch is slipping a little bit,eh? Quote Producer of poorly photo-chopped pictures since 1999. Link to comment https://www.bigmacktrucks.com/topic/8325-what-does-r685rst-mean/#findComment-30779 Share on other sites More sharing options...
Rob Posted February 14, 2009 Share Posted February 14, 2009 your clutch is slipping a little bit,eh?Actually broke my glasses on a radar feedhorn last week and haven't got them replaced yet.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/8325-what-does-r685rst-mean/#findComment-30780 Share on other sites More sharing options...
other dog Posted February 14, 2009 Share Posted February 14, 2009 Actually broke my glasses on a radar feedhorn last week and haven't got them replaced yet.RobI know foghorn leghorn Quote Producer of poorly photo-chopped pictures since 1999. Link to comment https://www.bigmacktrucks.com/topic/8325-what-does-r685rst-mean/#findComment-30784 Share on other sites More sharing options...
HK Trucking Posted February 14, 2009 Share Posted February 14, 2009 Transmissions were 5 speed with the two stick 6 speed 10 and 12 speed air shift as optionssteveActually, the 10 & 12 speed transmissions would not have been factory options on a R685ST.. Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment https://www.bigmacktrucks.com/topic/8325-what-does-r685rst-mean/#findComment-30788 Share on other sites More sharing options...
mackkid Posted February 14, 2009 Share Posted February 14, 2009 (edited) Actually, the 10 & 12 speed transmissions would not have been factory options on a R685ST..Maybe not in a r685ST but were available in a R685 RSTSteve Edited February 14, 2009 by mackkid Quote Link to comment https://www.bigmacktrucks.com/topic/8325-what-does-r685rst-mean/#findComment-30824 Share on other sites More sharing options...
r600 Posted February 14, 2009 Author Share Posted February 14, 2009 Maybe not in a r685ST but were available in a R685 RSTStevethanks everybody for the information,steve thanks to you i didnt take any notice before that your truck r685rst too,cheers all adrian Quote Link to comment https://www.bigmacktrucks.com/topic/8325-what-does-r685rst-mean/#findComment-30827 Share on other sites More sharing options...
other dog Posted February 14, 2009 Share Posted February 14, 2009 thanks everybody for the information,steve thanks to you i didnt take any notice before that your truck r685rst too,cheers all adriang'day mate (that's Australian),eh? (that's Canadian)...sorry, just showing off because I know 3 languages. Rob hasn't said anything funny lately...must be busy on a serious project. Quote Producer of poorly photo-chopped pictures since 1999. Link to comment https://www.bigmacktrucks.com/topic/8325-what-does-r685rst-mean/#findComment-30828 Share on other sites More sharing options...
other dog Posted February 14, 2009 Share Posted February 14, 2009 Actually broke my glasses on a radar feedhorn last week and haven't got them replaced yet.Robby the way-how come you weren't wearing glasses in the photo of "yourself" that you posted on your birthday? That was long before Foghorn Leghorn allegedly broke your glasses...Ah-HA!!!-busted!see, we're smart-can't pull the wool over our eyes! reminds me of the old saying- "don't do that, it'll make you go blind!". So I quit when I needed glasses. Quote Producer of poorly photo-chopped pictures since 1999. Link to comment https://www.bigmacktrucks.com/topic/8325-what-does-r685rst-mean/#findComment-30829 Share on other sites More sharing options...
Rob Posted February 14, 2009 Share Posted February 14, 2009 by the way-how come you weren't wearing glasses in the photo of "yourself" that you posted on your birthday? That was long before Foghorn Leghorn allegedly broke your glasses...Ah-HA!!!-busted!see, we're smart-can't pull the wool over our eyes! reminds me of the old saying- "don't do that, it'll make you go blind!". So I quit when I needed glasses.I only need them to read with. I guess I never stopped; maybe that is why my eyesight is in a state of decay.Think this could affect the arthritis in my shoulder?I also wonder if I may have choked Foghorn Leghorn as I've choked so much chicken through the years I may have forgotten! I seem to remember some rude obnoxious chicken trying to break into the conversation with "I say, I say, Boy"! 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/8325-what-does-r685rst-mean/#findComment-30830 Share on other sites More sharing options...
other dog Posted February 14, 2009 Share Posted February 14, 2009 http://www.youtube.com/watch?v=KcaYwkBPpNQ Quote Producer of poorly photo-chopped pictures since 1999. Link to comment https://www.bigmacktrucks.com/topic/8325-what-does-r685rst-mean/#findComment-30832 Share on other sites More sharing options...
HK Trucking Posted February 15, 2009 Share Posted February 15, 2009 Maybe not in a r685ST but were available in a R685 RSTSteveWhile I'm not familiar with what you guys had for factory options in Australia, the ENDT 675 used in the R685 is a Maxidyne engine, designed for use with the 5 or 6 speed Maxitorque transmissions, and those were the only transmissions offered with that engine here in the States. Quote "If You Can't Shift It Smoothly, You Shouldn't Be Driving It" Link to comment https://www.bigmacktrucks.com/topic/8325-what-does-r685rst-mean/#findComment-30849 Share on other sites More sharing options...
jeffbyrne Posted February 16, 2009 Share Posted February 16, 2009 Hi Adrian, Steve's answered it for you, I have noticed though some macks will be stamped as RST, but appear to have a heavyweight rear end. In the 60's thru to 80's to me an RS was double splined rear axles, i.e. 40's or 44's. In the late 60's alot of these Macks were only 40,000lbs rear, but people say they are 44,000lbs because they have a cast pedestal and double splined axles, I'm not so sure. Jeffro. Quote Link to comment https://www.bigmacktrucks.com/topic/8325-what-does-r685rst-mean/#findComment-30906 Share on other sites More sharing options...
r600 Posted February 16, 2009 Author Share Posted February 16, 2009 Hi Adrian, Steve's answered it for you, I have noticed though some macks will be stamped as RST, but appear to have a heavyweight rear end. In the 60's thru to 80's to me an RS was double splined rear axles, i.e. 40's or 44's. In the late 60's alot of these Macks were only 40,000lbs rear, but people say they are 44,000lbs because they have a cast pedestal and double splined axles, I'm not so sure. Jeffro.thanks jeffro,it all every interesting,cheers adrian Quote Link to comment https://www.bigmacktrucks.com/topic/8325-what-does-r685rst-mean/#findComment-30921 Share on other sites More sharing options...
jeffbyrne Posted February 16, 2009 Share Posted February 16, 2009 thanks jeffro,it all every interesting,cheers adrian Hi Adrian, I've replied to your message twice now, it still tells me no messages sent. Last message this morning 17/feb jeff. Quote Link to comment https://www.bigmacktrucks.com/topic/8325-what-does-r685rst-mean/#findComment-30948 Share on other sites More sharing options...
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