Bigdogtrucker Posted August 21, 2016 Share Posted August 21, 2016 Got lucky and picked up a pretty nice hood for my "75 686, came off the exact year and model! When did they go to the smooth fenders without the "body line" in them? Quote Link to comment Share on other sites More sharing options...
57 bcr Posted August 24, 2016 Share Posted August 24, 2016 Good question,BDT. I'm thinking around '81 or so when the CMCAC came into the picture. Al Quote IF YOU BOUGHT IT, A TRUCK BROUGHT IT..AND WHEN YOU'RE DONE WITH IT, A TRUCK WILL HAUL IT AWAY!!! Big John Trimble,WRVA Link to comment Share on other sites More sharing options...
kscarbel2 Posted August 24, 2016 Share Posted August 24, 2016 Up thru 1981, the R-model used a 1QM5480B hood (pre-CMCAC). From 1982, with the advent of the CMCAC-equipped R-model, the hood changed to the 1QM5556. CMCAC - Chassis Mounted Charge-Air Cooling Quote Link to comment Share on other sites More sharing options...
Vladislav Posted August 24, 2016 Share Posted August 24, 2016 So did all the short hoods (non-CMCAC) have the rib on fenders? Working on my (later) R-model hood I found out it was glued together of different fiberglass parts. The outer skin seems as the main structure and the inner surface formed up on the different matrix. Then they put together. It seems either there were more parts used in one hood. You just difficult to figure out how many looking a solid one. So too probably those horizontal lines on early hood fenders are just split areas between them. Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment Share on other sites More sharing options...
blackdog2 Posted August 24, 2016 Share Posted August 24, 2016 77 x-tra rib must of been a different supplier . Quote Ed Link to comment Share on other sites More sharing options...
kscarbel2 Posted August 24, 2016 Share Posted August 24, 2016 11 hours ago, Vladislav said: So did all the short hoods (non-CMCAC) have the rib on fenders? Working on my (later) R-model hood I found out it was glued together of different fiberglass parts. The outer skin seems as the main structure and the inner surface formed up on the different matrix. Then they put together. It seems either there were more parts used in one hood. You just difficult to figure out how many looking a solid one. So too probably those horizontal lines on early hood fenders are just split areas between them. Vlad, our original hood supplier had inconsistent quality due to old manufacturing processes. The dealers returned quite a few defectively manufactured hoods. The plant, dealers and customers painted and mounted hoods, only to discover defects. And regarding the parts distribution centers, shipping and the dealers, the wood crating was poor. But then we switched suppliers, and both the quality and packaging became very good. The original supplier's hoods were light gray in color, while the second supplier's hoods were dark gray, almost black. The first supplier was Structofab, and we replaced them in May 1990 with the vastly superior Rene who used the latest manufacturing processes. I just remembered all this, as we'd touched on it relating to that plant fire. I haven't thought about these things in MANY years (http://www.bigmacktrucks.com/topic/39396-mack-production-line-fire/#comment-284274). 2 Quote Link to comment Share on other sites More sharing options...
Vladislav Posted August 24, 2016 Share Posted August 24, 2016 Kevin, these facts are pretty interesting, as usual. Although they initiate a new question from my side. You stated that the hood supplier was changed in 1990 and pre-date hoods were gray. That doesn't corellate with at least two R-model hoods I have. Both trucks were built in 1988 and both hoods show black (dark gray) gel coat under primer. They sure could be swapped later. Any other reason? Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment Share on other sites More sharing options...
kscarbel2 Posted August 24, 2016 Share Posted August 24, 2016 Vlad, this is a long time ago. I know we finally cut off Structofab completely in May 1990. But I believe we began phasing in the Rene product before that, to make sure they could satisfy us before cancelling Structofab altogether. You guys have me recalling a lot of old Mack history. Quote Link to comment Share on other sites More sharing options...
Popular Post 1965 Posted August 24, 2016 Popular Post Share Posted August 24, 2016 11 minutes ago, kscarbel2 said: You guys have me recalling a lot of old Mack history. That's what we like!!! Or me anyway! 3 Quote Link to comment Share on other sites More sharing options...
BillyT Posted August 25, 2016 Share Posted August 25, 2016 You guys are walking parts books lol 2 Quote Link to comment Share on other sites More sharing options...
Hobert62 Posted August 25, 2016 Share Posted August 25, 2016 12 hours ago, 1965 said: That's what we like!!! Or me anyway! I'm just baffled someone can rember all this! I have a hard enough time remembering if I turned the lights off. 2 Quote Link to comment Share on other sites More sharing options...
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