http://www.repairengineering.com/bolt-torque-chart.html. The question is what grade bolts are used. I know some CAT bolts are grade 8, maybe all of them, but I have also had some on a D311 clutch that popped off with only a whimper, so you may run across anything in an old machine (including those that have been overstressed in the past and are just ready to fail). Probably best that those kind go ahead and fail when you're reassembling. It's a pain when it happens, but better now than later.
Just an example, recently had our skid loader in the shop taking the wheels off to grease and check bearings and seal behind each one for wrapped string/wire/netwrap etc. One of our young guys was putting the 5/8" NF nuts back on with a 1" air impact wrench. I watched him do it and while I was there, he wasn't letting it sit and hammer on them, just tightening until they stopped and getting off them. Next day, one of the wheels fell off. 7 out of 8 studs had snapped off clean :jaw:
G'day. Scanned general torque values out of a manual from 1982 this chart appears in every manual at least from the 70,s through to 90's but use with care
Kevin[attachment=16225]Caterpillar general torque values 12-1982.pdf[/attachment]
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