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 yesterday 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 Monday at 01:38 AM Author Share Posted Monday at 01:38 AM 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 Monday at 01:49 AM Author Share Posted Monday at 01:49 AM 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 Monday at 01:50 AM Share Posted Monday at 01:50 AM 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 Monday at 12:53 PM Share Posted Monday at 12:53 PM 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 20 hours ago Author Share Posted 20 hours ago 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 13 hours ago Popular Post Share Posted 13 hours ago 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 10 hours ago Share Posted 10 hours ago 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 7 hours ago Share Posted 7 hours ago 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 4 hours ago Share Posted 4 hours ago This would be a good mystery for that guy that straightens the framesin Texas. Looks like it has an extra spring added . Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591572 Share on other sites More sharing options...
terry Posted 2 hours ago Share Posted 2 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 Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591582 Share on other sites More sharing options...
Vladislav Posted 2 hours ago Share Posted 2 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. 1 1 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 2 hours ago Share Posted 2 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. 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 1 hour ago Share Posted 1 hour 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. Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591585 Share on other sites More sharing options...
Mark T Posted 1 hour ago Share Posted 1 hour 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. Quote Link to comment https://www.bigmacktrucks.com/topic/76405-suspension-questions/#findComment-591586 Share on other sites More sharing options...
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