torque for shank bolts

Reese states 300 ft-lbs on their installation instructions. If you don't have 300 ft-lb torque wrench the instructions also state 150 ft-lbs and then another 1/4 turn so that is what I did. That other 1/4 turn is a real pain even with a 3 foot breaker bar.

jfkmk wrote:

TBammer wrote:
Get the biggest breaker bar you can find for the socket that fits the bolt. Then get a 4 foot length of cheater pipe to go over the breaker bar. Then have your biggest/strongest friend lean on it until he can't lean no more. But my last reading was like 300-400 ft/lbs.

Or you can take it some place where they actually use a torque wrench.

Yeah, or you can do that, which is prolly the best move.

Scientifically, as tight as I can get with a 1/2 drive ratchet or my air impact on middle setting. Couple hundred ft lbs.

asme spec. 250 lb./ft for 3/4" nc gr. 5 dry bolt in that application. Torque is not an issue as much as shear load because the bolt is not so much a connection as it is subjected to side shear load. Lubes reduce torque spec. depending on type. Machine oil to moly paste, makes a big difference. Moly can reduce torque by 50 %

Standard is by ball shank dia, but best to check your ball's OEM specification

https://www.etrailer.com/question-109595.html

Curt recommends the use of 250 ft/lbs of torque when tightening the nuts of their hitch balls with a 1 inch diameter shank like the part # C40034 that you referenced.

The general rule is for a 3/4" shank tighten to 150 ft/lbs For a 1" shank tighten to 250 ft/lbs, and for a 1-1/4 inch shank 450 ft/lbs.

Ops...reread the OP's comments...guess it is the WD hitch head bolts...use the OEM's spec

If its an equal-i-zer the manual recommends 320 ft/lbs

250 lb-ft for most manufacturers.
Barney

TBammer wrote:
Get the biggest breaker bar you can find for the socket that fits the bolt. Then get a 4 foot length of cheater pipe to go over the breaker bar. Then have your biggest/strongest friend lean on it until he can't lean no more. But my last reading was like 300-400 ft/lbs.

Or you can take it some place where they actually use a torque wrench.

Get the biggest breaker bar you can find for the socket that fits the bolt. Then get a 4 foot length of cheater pipe to go over the breaker bar. Then have your biggest/strongest friend lean on it until he can't lean no more. But my last reading was like 300-400 ft/lbs.

832.42729 somethings.

Ok, probably not.

Why not ask the manufacturer of the hitch?