leversole Posted March 15, 2014 Share Posted March 15, 2014 Working on the rear crossmember of the Superliner (working on the trailer hitch)...new nuts wont go on old bolts or vice-versa...tape and die wont repair...come to find out they are 5/8-13 thread...WTF...never heard of such a thing! Can't find any information...is this some Mack only thread?!? Anybody got anything? Quote Link to comment Share on other sites More sharing options...
gearhead204 Posted March 15, 2014 Share Posted March 15, 2014 METRIC!!!!! Quote Link to comment Share on other sites More sharing options...
leversole Posted March 15, 2014 Author Share Posted March 15, 2014 Damn! Guess they are M16-2.0...would not hve thought my truck had any metric! Guess you learn something everyday! 1 Quote Link to comment Share on other sites More sharing options...
1958 F.W.D. Posted March 15, 2014 Share Posted March 15, 2014 damn commie threads.. 1 Quote TWO STROKES ARE FOR GARDEN TOOLS Link to comment Share on other sites More sharing options...
gearhead204 Posted March 15, 2014 Share Posted March 15, 2014 THAT ONE IS A REAL PAIN IN THE HEMROID Damn! Guess they are M16-2.0...would not have thought my truck had any metric! Guess you learn something everyday! yep the nut goes on a few threads and then your best 1/2 impact cant do more than just wreck about 7/16 worth of threads the damn nuts don't seem to pile up but the bolt threads do!!! Quote Link to comment Share on other sites More sharing options...
j hancock Posted March 15, 2014 Share Posted March 15, 2014 That's a really bad problem you don't want.Better send the truck over to me.. Quote JimIt doesn't cost anything to pay attention. Link to comment Share on other sites More sharing options...
2stacksuperdog Posted March 15, 2014 Share Posted March 15, 2014 Seems like during the 80s mack mixed metric and customary sizes.... Quote Matt Link to comment Share on other sites More sharing options...
rsb502 Posted March 16, 2014 Share Posted March 16, 2014 Yep Metric frame bolts in a Mack, I got no idea why they mixed sae and metric fasteners but they did. Quote "Any Society that would give up a little LIBERTY to gain a little SECURITY will Deserve Neither and LOSE BOTH" -Benjamin Franklin"If your gonna be STUPID, you gotta be TOUGH" "You cant always get what you want, but if you try sometimes you get what you need" Link to comment Share on other sites More sharing options...
b61mack Posted March 16, 2014 Share Posted March 16, 2014 A metric bolt has a 12.5 or a 10.5 or some numbers like that on the socket end of the bolt. Quote Link to comment Share on other sites More sharing options...
eddeere Posted March 16, 2014 Share Posted March 16, 2014 I ran into the same thing on Case backhoes. S.A.E. and metric. You did not what you had until it was time to put everything back together. 1 Quote Link to comment Share on other sites More sharing options...
Maddog13407 Posted March 16, 2014 Share Posted March 16, 2014 Ford did the same thing on some Super duty's from 99-2007 to. rip your hair out when you think its metric and its standard. John deere does the same thing on equipment also. they always mix metric and sae fasteners Quote Link to comment Share on other sites More sharing options...
eddeere Posted March 16, 2014 Share Posted March 16, 2014 I had a new 99 Ford 550 Super duty that had both. If memory serves me the metric were a different color which was ok until they got dirty oil covered. Quote Link to comment Share on other sites More sharing options...
Pawel Posted March 16, 2014 Share Posted March 16, 2014 Does USA use the metric system? Nope. But it's getting there - inch by inch Once I had a really hard time to get SAE taps and dies for one project. A friend brought me a case of them from Australia.Here in Europe we don't use anything else but metric system any more - and it's really convenient!Good luck with your project, leversole and have a nice day everybodyPaweł Quote Link to comment Share on other sites More sharing options...
gearhead204 Posted March 17, 2014 Share Posted March 17, 2014 my old 1980 f250 all body fastners are meteric and power train is sae. thank god for 6pt. sockets only have to grab a 8, 10mm and no more trips to the tool box Quote Link to comment Share on other sites More sharing options...
kscarbel Posted March 17, 2014 Share Posted March 17, 2014 The second generation "RWI" Super-Liner (RW600) and MH Ultra-Liner share a common chassis which uses metric "body bound" bolts. There's a service bulletin that lays out the overall and shank lengths by size.We're accustomed to the English system, but the metric system is actually more versatile. Quote Link to comment Share on other sites More sharing options...
burnin oil Posted March 18, 2014 Share Posted March 18, 2014 Years ago I had a 2.8 Chevy motor long block. GM was proud of their first all metric motor. The 2.8 was missing a block plug and I found a replacement out of an old 327 core I had. Quote Link to comment Share on other sites More sharing options...
Freightrain Posted March 18, 2014 Share Posted March 18, 2014 Replaced the Buick V6 in parents car many years back. It was an '87, put an '86 motor in from a buddy. The '86 had SAE bolts for the front accy's and the '87 was all metric. I had to go buy a bunch of odd bolts to put it back together.Mid 80's is when things started to switch over. You have to keep both sets of sockets/wrenches handy. Love my old 60's stuff. With about 4 wrenches you can completely dismantle a car/truck. Quote Larry 1959 B61 Liv'n Large...................... Charter member of the "MACK PACK" Link to comment Share on other sites More sharing options...
j hancock Posted March 18, 2014 Share Posted March 18, 2014 I have had it explained for years metric is more precise, better, adaptable, the "world standard" etc....The world standard for who?BS.I think it has only helped sell more wrenches and fasteners and make repair work more difficult and expensive especially when a vehicle has mix and match nuts and bolts. 1 Quote JimIt doesn't cost anything to pay attention. Link to comment Share on other sites More sharing options...
Vladislav Posted March 18, 2014 Share Posted March 18, 2014 Too sorry about those stories folks.I can feel your pain so deep.Because, as Pawel said, there's no SAE stuff here at all!Or just at all.The SAE hardware on my Mack trucks is a kind of adventure to me, an additional point of luck to keep it all original.Although a mixture of metric stuff with inches looks to me as a real BS. Leslie, if the things will go really bad I can send some best quality bolts and nuts off Mercedes-Benz cars. Used though.McMaster might be ready to help I hope. They weren't too friendly to me though being saying "No stuff to Russia by any way". Quote Никогда не бывает слишком много грузовиков! leversole 11.2012 Link to comment Share on other sites More sharing options...
leversole Posted March 18, 2014 Author Share Posted March 18, 2014 Thanks Vlad...now that I know what's going on, I will STOP and get the correct nut when it gets tight after a couple fo threads!! Quote Link to comment Share on other sites More sharing options...
bbigrig Posted March 19, 2014 Share Posted March 19, 2014 Canada has been Metric for a long time....Would this truck happen to be an Oakville build? Quote Link to comment Share on other sites More sharing options...
leversole Posted March 22, 2014 Author Share Posted March 22, 2014 Nope! Built in PA! Quote Link to comment Share on other sites More sharing options...
farmer52 Posted March 22, 2014 Share Posted March 22, 2014 Yes, many manufacturers started "mixing" US fasteners with metric fasteners in engines and vehicles in the mid 1970s. There were a few that used Metric heads on US threaded bolts. Talk about a cluster. Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment Share on other sites More sharing options...
Joe Ditchkus Posted March 23, 2014 Share Posted March 23, 2014 Ken Where would you ever find that kind of replacement bolts.I imagine just put regular SAE bolts back in. Joe D. Quote Link to comment Share on other sites More sharing options...
Phase 1 Posted March 23, 2014 Share Posted March 23, 2014 The reason there is a mixture is that when a component is designed new, normally the manufacturers design it for metric fasteners. If it is a part they used before they started using metric, it is inch sized. If they buy an off-the-shelf item from a vendor, it might be inch sized.The quicker things get changed to all metric, the better. But it will be difficult to switch over for some things. There are metric sized tires, but they go on inch sized rims. Metric sockets that go on 3/8 and 1/2 drivers. And a 2x4 stud or a 4x8 sheet of plywood will be hard to change. Quote Link to comment 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.