bultaco Posted February 10, 2008 Share Posted February 10, 2008 here are a few photos of recent replacement frame rails and trunion stand on 5 of our 99 RDs, big job! Quote Link to comment https://www.bigmacktrucks.com/topic/3406-rd-frame-rail-replacement/ Share on other sites More sharing options...
Rob Posted February 10, 2008 Share Posted February 10, 2008 Yes it is a big job not only in weight, but also the amount of hours spent getting everything to stay in place while it's support is removed. How about the amount of time it takes to get the holes drilled to locate the crossmembers properly? A mag drill is essential for this operation.Progress looks good at this point in pictures!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/3406-rd-frame-rail-replacement/#findComment-16932 Share on other sites More sharing options...
terry Posted February 10, 2008 Share Posted February 10, 2008 What do do with them trucks that 1999 trucks are needing frames and trunnion brackets? terry Quote Link to comment https://www.bigmacktrucks.com/topic/3406-rd-frame-rail-replacement/#findComment-16935 Share on other sites More sharing options...
Dlock13 Posted February 10, 2008 Share Posted February 10, 2008 Are you using new factory rails? Or did you have rails made? Quote Link to comment https://www.bigmacktrucks.com/topic/3406-rd-frame-rail-replacement/#findComment-16937 Share on other sites More sharing options...
maxidyne237 Posted February 11, 2008 Share Posted February 11, 2008 Thats a lot of work. What broke the frame, rust spread or cracked? Swingsets are pretty common problem areas with lighter rears in tri axle's Quote Link to comment https://www.bigmacktrucks.com/topic/3406-rd-frame-rail-replacement/#findComment-16943 Share on other sites More sharing options...
bultaco Posted February 14, 2008 Author Share Posted February 14, 2008 frames are single 3/8,they are set up as 4 axle dumps, used in biulding of log roads. I have not been around these paticular trucks all there life but I believed they were overloaded on a regular basis.replacement rails are Mack rails pre drilled to back of cab. Quote Link to comment https://www.bigmacktrucks.com/topic/3406-rd-frame-rail-replacement/#findComment-17032 Share on other sites More sharing options...
fullfuel01 Posted February 17, 2008 Share Posted February 17, 2008 never heard about predrilled, just tell your WB and rear susp? how much it cost? Quote Link to comment https://www.bigmacktrucks.com/topic/3406-rd-frame-rail-replacement/#findComment-17088 Share on other sites More sharing options...
mudslut28 Posted February 18, 2008 Share Posted February 18, 2008 My R Model could stand a couple of chairs. Thats something I really dont wanna do until I have to. I have bead tightened them once. Quote Link to comment https://www.bigmacktrucks.com/topic/3406-rd-frame-rail-replacement/#findComment-17123 Share on other sites More sharing options...
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