KCH1974 Posted February 15 Share Posted February 15 (edited) Hello. I could use help identifying and possibly locating a few parts for our broken trunnion shaft. I have had multiple parts stores and yards looking and have been unsuccessful. Part of my struggle is being what to actually call the suspension design as a whole. And then the related components. What I need is a trunnion shaft, 1- threaded nut (3-5/16”x12 tpi), 1 bronze/brass washer, possibly 2 trunnion hanger brackets. ( am not certain if I have the correct names of these parts. So help me out please.) I have pictures to help this process. But could only load 2. Any leads would be appreciated. Edited Friday at 05:39 PM by KCH1974 Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/ Share on other sites More sharing options...
Joey Mack Posted February 15 Share Posted February 15 Can you post the year make and model of the truck? I am wondering if it is part of a Hendrickson walking beam setup. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591264 Share on other sites More sharing options...
Mark T Posted February 15 Share Posted February 15 🤔 almost looks like something from an old lowboy. hmmmm 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591268 Share on other sites More sharing options...
Geoff Weeks Posted February 15 Share Posted February 15 Doesn't look like a walking beam I know. Looks more like a single point trailer suspension (Hutch) but not quite right either. Yeah 2nd the application info needed. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591269 Share on other sites More sharing options...
terry Posted February 15 Share Posted February 15 13 hours ago, KCH1974 said: Hello. I could use help identifying and possibly locating a few parts for our broken trunnion shaft. I have had multiple parts stores and yards looking and have been unsuccessful. Part of my struggle is being what to actually call the suspension design as a whole. And then the related components. What I need is a trunnion shaft, 1- threaded nut (3-5/16”x12 tpi), 1 bronze/brass washer, possibly 2 trunnion hanger brackets. ( am not certain if I have the correct names of these parts. So help me out please.) I have pictures to help this process. But could only load 2. Any leads would be appreciated. Mack trunnion? terry 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591273 Share on other sites More sharing options...
cruiseliner64 Posted February 15 Share Posted February 15 Doesnt look like the Camelback suspention on our Mack.The shaft end nuts are wrong and the shaft hanger on our Mack splits in half,not wraped around the trunnion shaft.Yeah need to know what truck it came off... Paul 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591277 Share on other sites More sharing options...
KCH1974 Posted February 16 Author Share Posted February 16 I don’t have any info regarding the chassis. As it had been chopped and converted to a trailer before we bought it. I will try more pictures.j Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591309 Share on other sites More sharing options...
KCH1974 Posted February 16 Author Share Posted February 16 Any tricks to getting pictures on here? I am not having much luck with that either. Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591311 Share on other sites More sharing options...
Geoff Weeks Posted February 16 Share Posted February 16 Fairly sure it is a trailer suspension, not a truck suspension being used on a trailer. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591312 Share on other sites More sharing options...
Brocky Posted February 16 Share Posted February 16 11 hours ago, KCH1974 said: Any tricks to getting pictures on here? I am not having much luck with that either. Two ways: First is the free Postimage.com website. Follow the directions, I know this works from a desktop, but not sure about from a phone??? Second is to join BMT.. Send Barry the $75(??) dollars and the system will work for you. Quote Brocky Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591325 Share on other sites More sharing options...
KCH1974 Posted yesterday at 02:32 AM Author Share Posted yesterday at 02:32 AM Here is another picture. It answers some of everyone’s questions. It may be a trailer suspension. If so, how to identify it? It has 4” wide springs and looks like Mack axles to me. It does have bronze bushings for the spindles. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591557 Share on other sites More sharing options...
Popular Post Joey Mack Posted yesterday at 10:09 AM Popular Post Share Posted yesterday at 10:09 AM I guess someone made a trailer out of Mack rears. 🤔 4 Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591561 Share on other sites More sharing options...
Geoff Weeks Posted yesterday at 01:01 PM Share Posted yesterday at 01:01 PM Picture sure remove any doubt. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591563 Share on other sites More sharing options...
mechohaulic Posted yesterday at 04:16 PM Share Posted yesterday at 04:16 PM having that heavy suspension, be interesting to see what the trailer looked like. did a clever job to cover /seal the banjo. have to wonder if wheel bearings were changed to grease or filled the banjo with gear oil. rear bull gear usually did the movement to circulate oil to wheel bearings. low use trailer ; oil in hub was good enough ?? 2 Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591570 Share on other sites More sharing options...
Mark T Posted yesterday at 06:37 PM Share Posted yesterday at 06:37 PM This would be a good mystery for that guy that straightens the framesin Texas. Looks like it has an extra spring added . 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591572 Share on other sites More sharing options...
terry Posted 23 hours ago Share Posted 23 hours ago 4 hours ago, mechohaulic said: having that heavy suspension, be interesting to see what the trailer looked like. did a clever job to cover /seal the banjo. have to wonder if wheel bearings were changed to grease or filled the banjo with gear oil. rear bull gear usually did the movement to circulate oil to wheel bearings. low use trailer ; oil in hub was good enough ?? If bearings are oil lubed, would’nt it take alot more oil to fill? terry 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591582 Share on other sites More sharing options...
Popular Post Vladislav Posted 23 hours ago Popular Post Share Posted 23 hours ago Definitely an old Mack rear bogie. 10 bolt carrier mounting pattern. Off an L-model or early B-model. Had those "elephant ears" attached to the chassis and the trunnion brackets attached to them. By the bolts which were cut by torch. My guess the only way is to check out junk yards with really old Mack stuff. But those trunnion axles tend to be rusty where they (are supposed to) spin in bronze bushings due to long gone seals. So if even the right setup would be found there are very high chances on need of heavy rebuild of the shaft ends and the bushings. I've done that for my truck. 3 2 Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591583 Share on other sites More sharing options...
Vladislav Posted 23 hours ago Share Posted 23 hours ago 23 minutes ago, terry said: If bearings are oil lubed, would’nt it take alot more oil to fill? terry Those brearings were also grease filled. At least that's what I have in my NR-model of 1945. Jack shaft end caps (removable flanges) have extra seals fit inside which separate ends of the axle housing tubes from the bearings cavity and gear oil can't go there. 1 Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591584 Share on other sites More sharing options...
Geoff Weeks Posted 22 hours ago Share Posted 22 hours ago I ran a "dummy" rear axle as a tag. I left the center section in place (to keep grit out and to add strength to the housing. Greased bearing and axle caps. Over 100K mile like that with no problems. Then I swapped out the center and made a full tandem again. Grease does just fine. Looks like Vlad has the answer as to why none of recognized those hanger pieces. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591585 Share on other sites More sharing options...
Mark T Posted 21 hours ago Share Posted 21 hours ago Vlad is on to something. There's an old post from 41chevy from about ten years ago with a bogie upside down that looks quite similar. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591586 Share on other sites More sharing options...
Popular Post Vladislav Posted 5 hours ago Popular Post Share Posted 5 hours ago This is what that looked like back in the day. 3 1 2 Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591612 Share on other sites More sharing options...
KCH1974 Posted 4 hours ago Author Share Posted 4 hours ago 1 hour ago, Vladislav said: This is what that looked like back in the day. If only I could source a pair of those Trunnion saddles. I can find a new Trunnion bar. Would have to have it machined a bit to match. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591616 Share on other sites More sharing options...
Geoff Weeks Posted 3 hours ago Share Posted 3 hours ago (edited) At this point it might be cheaper to go searching for a used suspension out of a wrecked dump trailer with a Hutch (or similar) single point suspension. From a cost/benefit ratio, something more modern will pay dividends in the future. Edited 3 hours ago by Geoff Weeks 1 Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591617 Share on other sites More sharing options...
mechohaulic Posted 2 hours ago Share Posted 2 hours ago question I have which I didn't see asked !! IS ::: are You looking to build a truck or trailer. we see this Mack suspension was from a modified trailer. determination is to find a Mack suspension?? as previous stated ; would make more sense if a trailer is being constructed to find a trailer set up building a (Mack) pictures appreciated Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591628 Share on other sites More sharing options...
Vladislav Posted 53 minutes ago Share Posted 53 minutes ago 3 hours ago, KCH1974 said: If only I could source a pair of those Trunnion saddles. I can find a new Trunnion bar. Would have to have it machined a bit to match. When I was fixing that setup I brought the shaft to machine shop and they cut the ends with lathe. Barely could remove the rust completely since there are threads for flange nuts at the ends and you can't make the shaft OD less than the threads since the saddles wouldn't pass the threaded portions. Than for repairing the saddles, actually - brass bushings (those were bronze originally) I had to purchase a piece of brass round stock about 100mm/4" OD and 400mm/16" long. Which cost some $$. And than a lathe man cut four bushings out of it to the size of the machined shaft. Also you need seals installed into the saddles at the inner side and there are wear rings pressed onto the shaft the seals work against. Those were rusty too which was the initial reason of all the damage. So I had to fabricate them either. I gave them to halvanic shop and they were plated chrome to survive long. So all in all that was quite a story. 1 1 Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591642 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.