sodly Posted April 16, 2018 Share Posted April 16, 2018 Can anyone tell me what engines each of these RW model numbers designate? I realize some of these were very low production variations. RW612 RW632 RW633 RW643 RW652 RW653 RW712 RW732 RW733 RW743 RW752 RW753 Quote Link to comment Share on other sites More sharing options...
85snowdog Posted April 16, 2018 Share Posted April 16, 2018 There was a thread last fall that might help. 41chevy posted a very good breakdown on model and engine codes. https://www.bigmacktrucks.com/topic/51420-r-model-vin-decoder/?tab=comments#comment-382894 Quote Keith Link to comment Share on other sites More sharing options...
Dirtymilkman Posted April 16, 2018 Share Posted April 16, 2018 Why did they skip 2 for engine models? Is there a secret engine we don't Know about? Quote Link to comment Share on other sites More sharing options...
Rob Posted April 16, 2018 Share Posted April 16, 2018 10 minutes ago, Dirtymilkman said: Why did they skip 2 for engine models? Is there a secret engine we don't Know about? Maybe the supply of dilithium crystals dried up during development and engineering was afraid they couldn't complete their "five year mission". I don't know but had wondered that in years past. Always thought Hercules, or Continental should have been in the power mix but both of those were absorbed by the White Motors corp. and they built trucks also. 1 Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
41chevy Posted April 16, 2018 Share Posted April 16, 2018 3 hours ago, Dirtymilkman said: Why did they skip 2 for engine models? Is there a secret engine we don't Know about? 2 was for Thermodyne Gas engines, NLA by than Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment Share on other sites More sharing options...
Rob Posted April 16, 2018 Share Posted April 16, 2018 3 minutes ago, 41chevy said: 2 was for Thermodyne Gas engines, NLA by than A gasoline powerplant would never have crossed my mind into the mid and late 1970's as everything was switching to diesel quickly. 1 Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
sodly Posted April 17, 2018 Author Share Posted April 17, 2018 I'm talking about the 4th and 5th digit in these codes. For instance, what's the difference between a 32 and 33? Or a 52 and a 53? And what's a 43? These are all different model engines, correct? Quote Link to comment Share on other sites More sharing options...
Rob Posted April 17, 2018 Share Posted April 17, 2018 The 50 series referred to Caterpillar engines. I believe the 40 series was Detroit with 30 series being Cummins. I'm not really certain on any of them except Caterpillar. Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
41chevy Posted April 17, 2018 Share Posted April 17, 2018 (edited) 59 minutes ago, sodly said: I'm talking about the 4th and 5th digit in these codes. For instance, what's the difference between a 32 and 33? Or a 52 and a 53? And what's a 43? These are all different model engines, correct? Edited April 17, 2018 by 41chevy 2 Quote "OPERTUNITY IS MISSED BY MOST PEOPLE BECAUSE IT IS DRESSED IN OVERALLS AND LOOKS LIKE WORK" Thomas Edison “Life’s journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting ‘Holy shit, what a ride!’” P.T.CHESHIRE Link to comment Share on other sites More sharing options...
Rob Posted April 17, 2018 Share Posted April 17, 2018 Lot's of variations I'd not known about but really wasn't around them too much. Quote Plodding along with no job nor practical application for my existence, but still trying to fix what's broke. Link to comment Share on other sites More sharing options...
j hancock Posted April 17, 2018 Share Posted April 17, 2018 On 4/15/2018 at 9:08 PM, sodly said: Can anyone tell me what engines each of these RW model numbers designate? I realize some of these were very low production variations. RW612 RW632 RW633 RW643 RW652 RW653 RW712 RW732 RW733 RW743 RW752 RW753 I am sorry my post answering this question with a full explanation was not understood. So. let's see if this will work 612- lighter chassis, Mack brand engine (six or eight cylinder), single axle suspension. 613- lighter chassis, Mack brand engine, tandem suspension 632 light chassis, Cummins brand engine, single suspension 633 light chassis, Cummins, tandem 643 light chassis, Detroit engine, tandem etc. 1 is Mack, 3 is Cummins, 4 Detroit 5 CAT FOURTH DIGIT 2 single axle, 3 tandem FIFTH DIGIT This system started with the MH Ultraliner (1980) than Super than Mack CH and CL etc. Hayward RWs used the old engine code system. The new system identifies the ENGINE BRAND not a specific model of engine. 2 Quote JimIt doesn't cost anything to pay attention. Link to comment Share on other sites More sharing options...
j hancock Posted April 17, 2018 Share Posted April 17, 2018 Mack Superliner II introduction letter showing new model identification system. https://www.bigmacktrucks.com/applications/core/interface/file/attachment.php?id=29843 2 Quote JimIt doesn't cost anything to pay attention. Link to comment Share on other sites More sharing options...
james j neiweem Posted April 17, 2018 Share Posted April 17, 2018 Now its MP-7 and 8 period. Woops forgot the baby Cummins. Quote Link to comment Share on other sites More sharing options...
85snowdog Posted April 17, 2018 Share Posted April 17, 2018 38 minutes ago, j hancock said: Mack Superliner II introduction letter showing new model identification system. https://www.bigmacktrucks.com/applications/core/interface/file/attachment.php?id=29843 Thanks for posting this Jim. As always , I learn something new all the time on here. A little off topic but…….I found the trim levels very interesting. I always thought it had to do with floor covering, and door panels and such. I had no idea it was colour. I have a trim level 3 (blue) in my RD. A trim level 2 (silver) in my R . Quote Keith Link to comment Share on other sites More sharing options...
sodly Posted April 19, 2018 Author Share Posted April 19, 2018 On 4/17/2018 at 8:37 AM, j hancock said: I am sorry my post answering this question with a full explanation was not understood. So. let's see if this will work 612- lighter chassis, Mack brand engine (six or eight cylinder), single axle suspension. 613- lighter chassis, Mack brand engine, tandem suspension 632 light chassis, Cummins brand engine, single suspension 633 light chassis, Cummins, tandem 643 light chassis, Detroit engine, tandem etc. 1 is Mack, 3 is Cummins, 4 Detroit 5 CAT FOURTH DIGIT 2 single axle, 3 tandem FIFTH DIGIT This system started with the MH Ultraliner (1980) than Super than Mack CH and CL etc. Hayward RWs used the old engine code system. The new system identifies the ENGINE BRAND not a specific model of engine. Aaaah... the light is coming on now! Thanks, j. hancock! Quote Link to comment Share on other sites More sharing options...
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