Front and rear, are there torque specs for the various suspension parts on the 46 1/2 ton pu? Or is it tighten until good and tight? Leaf spring U bolts, various shackle bolts, ect. Shop manual refers to assembly but no mention of torque.
Thanks
Ed
"it's only old if you can't find a use for it; otherwise it's cool and i'll use it."
I redid a 46 3/4 ton GMC and just tighten until good and tight with the exception of the engine and transmission . That was two years and 3000 miles ago and all is well.
Improperly tightened U-bolts can lead to premature wear/breakage of the leaf springs. By not tightening per the specs you're allowing the spring to flex and crack at the centering bolt hole. Always torque then per the specs...check out this link for all you need to know about U-bolts. You also don't want to reuse U-bolt as they won't have the necessary clamping force the second time around.
Ed, Ubolts are just bolts. You tighten them to the specs for the size and thread pitch for Grade/material used. I.E. Gr 5./1541 No oil. Torque per Marks suggestion, my table and the table in the link by Mike. It's all the same advice and numbers.
All the rest in the link is, French: Gobble de Gook Latin: Non Est Bonum Quod
Right is right, even if everyone is against it, and wrong is wrong, even if everyone is for it. - William Penn
"tighten it until it breaks, then back off 1/8 turn' - quote from my Dad sometime back in the late 50's.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12 '52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
"tighten it until it breaks, then back off 1/8 turn' - quote from my Dad sometime back in the late 50's.
I usually back off 1/2 turn.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
I read somewhere recently, that there is a torque spec for the mounting bolts for the front springs, front and rear eye bolts. The rear bolt gets torqued as it threads through both sides of the mount and the retaining nut has a torque value as well. The front shackle center bolt is also torqued. Anyone have any info on this?
As for ubolts and the spring perch torque, I received this bit of info. Hope it helps someone.
Ed
"it's only old if you can't find a use for it; otherwise it's cool and i'll use it."
