guywhalen00 Posted October 30, 2015 Share Posted October 30, 2015 (edited) Hi guys...I am new on here and have a very frustrating problem. I run a small diesel repair shop in southern Utah. I have a customer who purchased two 1994 CH613 10 wheel dump trucks from Ritchie Bros. I installed all new torque arm bushings in both of them and on one we removed the rear top loader diff and resealed it. Since then the truck that got the diff resealed keeps having the torque arm bracket bolts back out of the holes in the diff. We have tried several sets of new grade 8 bolts torqued with and without lub. We've loctited and this last time I even welded the heads of the bolts. Well guess what they are loose again. I have read thru the last few years of drive train topics and haven't come across anything similar. I do feel confident that this might just be the place I find a solution. Thanks Edited October 30, 2015 by guywhalen00 Quote Link to comment https://www.bigmacktrucks.com/topic/42428-ch613-top-loader-bolts-coming-loose/ Share on other sites More sharing options...
Dirtymilkman Posted October 30, 2015 Share Posted October 30, 2015 Sounds like a slight vibration maybe? Could be power divider. 1 Quote Link to comment https://www.bigmacktrucks.com/topic/42428-ch613-top-loader-bolts-coming-loose/#findComment-309363 Share on other sites More sharing options...
theakerstwo Posted October 30, 2015 Share Posted October 30, 2015 Let me say this, if the bolts did not loosen up then it in some cases it cracks the housing that the bolts screw into.This is common on macks that is loaded heavy and turning sharp turns. That is the only cracks I have my self seen in mack housings. 2 Quote glenn akers Link to comment https://www.bigmacktrucks.com/topic/42428-ch613-top-loader-bolts-coming-loose/#findComment-309366 Share on other sites More sharing options...
guywhalen00 Posted November 2, 2015 Author Share Posted November 2, 2015 Thanks guys. I'll check for cracks. This truck only drives about 2500 miles a year but gets worked full time in a housing development. Lots of tight radius turns. This suspension design is terrible. They have four other Mack trucks that use torque arms like everyone else does too bad this one can't be like that. Quote Link to comment https://www.bigmacktrucks.com/topic/42428-ch613-top-loader-bolts-coming-loose/#findComment-309798 Share on other sites More sharing options...
Mcrafty1 Posted November 24, 2015 Share Posted November 24, 2015 Would it be possible/helpful to install lateral torque rods?....... just thinking out loud. Quote Link to comment https://www.bigmacktrucks.com/topic/42428-ch613-top-loader-bolts-coming-loose/#findComment-312772 Share on other sites More sharing options...
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