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fulcrum nut torque
- Thread starter v8mgbal
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Dug
Jedi Trainee
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Most any on-line bolt dealer will have a listing of torque values.
For the most part, use the values for grade 5 fasteners with suspension fasteners.
If the thread size is 5/16”, 18-25 ft lbs. 3/8” 26-30 ft lbs. This isn’t completely based on dry or lubed threads as the torque will change depending on dry or “with lube”.
None of the suspension bolts in the locations you list are zinc plated so that's not a factor. Here is a simple site to double check torque values for specific size bolts.
https://www.efunda.com/designstandards/screws/calc_bolt_torque.cfm
Hope this helps. There is more to this than what is listed above but it's a start.
Dug
For the most part, use the values for grade 5 fasteners with suspension fasteners.
If the thread size is 5/16”, 18-25 ft lbs. 3/8” 26-30 ft lbs. This isn’t completely based on dry or lubed threads as the torque will change depending on dry or “with lube”.
None of the suspension bolts in the locations you list are zinc plated so that's not a factor. Here is a simple site to double check torque values for specific size bolts.
https://www.efunda.com/designstandards/screws/calc_bolt_torque.cfm
Hope this helps. There is more to this than what is listed above but it's a start.
Dug
SilentUnicorn
Yoda
Offline
I may have it in a manual at home...i can look when i get there. Dug is right tho..It will be in the ranges he stated.
m
m
Offline
Just looking in Bentley. There doesn't seem to be a torque setting for the A-arms. For the upper swivel nut (top of Kingpin) The torque setting says 40lb. However, in the dismantling and reassembly instructions, it says, "Check the movement of the swing axle, slight resistance should be felt when the swivel axle is moved from lock to lock. There should be no vertical movement of the swivel axle. Add or remove shims to increase or reduce the resistance. Fit a split pin to lock the swivel pin.
My new king pin had a lock nut instead of a split pin. As I recall, I turned it tight and backed it off a quarter turn or so.
According to Haynes, the A arms also have split pins or lock nuts. Therefore, tighten and back off will likely work there also.
My new king pin had a lock nut instead of a split pin. As I recall, I turned it tight and backed it off a quarter turn or so.
According to Haynes, the A arms also have split pins or lock nuts. Therefore, tighten and back off will likely work there also.