Popular Post Mckibbz Posted August 28 Popular Post Share Posted August 28 Hi everyone, I just picked up this truck and drove it home about 4 hours. 1985 Mack350 engine with 13speed. Cab air ride (Factory?) Body work has started and should be painting soon. I run a mobile heavy equipment business and this will be the new everyday service truck with a box and crane on it. With the searching I have done can't find many write ups on Cut off's from freightliner/Pete air leaf systems. I'll be only running one axle for service bed and would love to have a air ride setup. I'm hoping you knowledgeable folks can guide me in the right direction on how to go about it, my frame width is 33in and all the cut off's I've been looking at are 34. Any help is appreciated thanks for letting me join! 4 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74503-1985-r688st-my-first-mack/ Share on other sites More sharing options...
mrsmackpaul Posted August 28 Share Posted August 28 Welcome to the forum Looks like a heck of a work ute for tool boxes etc Air ride conversions seem to have most people slipping the new chassis rails over the outside of the old rails by a few feet and drilling and bolt it all together Paul 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74503-1985-r688st-my-first-mack/#findComment-557733 Share on other sites More sharing options...
seyser Posted August 28 Share Posted August 28 Nice looking truck! 1 1 Quote Link to comment https://www.bigmacktrucks.com/topic/74503-1985-r688st-my-first-mack/#findComment-557736 Share on other sites More sharing options...
Popular Post Vladislav Posted August 29 Popular Post Share Posted August 29 Welcome to the forum! One nice looking R-model indeed! As for airride conversion I would go another route than welding a frame section off a Freightliner and so on. You can find a cut off or just a suspension set off a R-model which was produced by Neway. Very common setup for R's at the time but more for tractors than dump trucks and so. Neway was usually installed as a tandem bogie but actually that's two sepapate suspensions each of conteins a pair of brackets you attach to the frame, a pair of big levers an axle attached to and one Macks axle with Mack differential. So you can just use one axle setup and install it onto your frame with no cutting/welding the original rails. Just drill bolt holes where they're needed to be. Doing that you'd need a crossmember for installation of the frame brackets (should be taken together with other parts) and also you'd use a differential with no power divider (from the RR axle) since you're going to have a single drive and don't need the divider. This way you achive a truck with all OEM parts and solid factory frame rails. Vlad 2 1 Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment https://www.bigmacktrucks.com/topic/74503-1985-r688st-my-first-mack/#findComment-557791 Share on other sites More sharing options...
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