bearing preload

[silvercrusher]

I am rebuilding my knuckles now the book says 0.3-7.9 lbs. The lowest # i can achive is 15lb.

What am i doing wrong.
I tighten turn tighten turn then back off and still i get 15lbs

Is my torque wrench screwed?


help

 

[lovetoski]

Is this for the wheel bearings?

 

[NocalFJ60]

Did you leave some shims out? You are talking the kunckle bearings right...not the wheel bearings.

I think you need to add some shims to loosen it up. Are the shims in the same locations they were in when you took it apart? You might have shims on both sides..top and bottom of the kunckle.

 

[silvercrusher]

for the wheel bearings

it just seems stiff and i can't see anything wrong

 

[hilander]

Sometimes when you put new seals in they will produce enough drag that you can't get the preload set using the book method. This is the result of having essentially two wheel seals in each hub. A "general" rule that seems to work is to tighten the adjusting nut in until the wheel bearings bind and then back the nut off a 1/4 turn and lock it down. After you run a couple hundred miles pull the tires off and check it again usually the seals will have seated enough that you can properly check and adjust, if needed, the pre-load. Lubricating the seals before you put the hubs on helps too.

Good times.

 

[silvercrusher]

thanks i'm sure i can't be this dumb it is only a wheel bearing. I've done quite a few just never measured before.
Thats what i get for going full technical.
f'n fish scale back to the tackle box with you.
I did notice the fsm says "friction force plus + ( 0.3-7.3 lbs)"

I think this is the problem i don't have a calculator that knows the co-efficient of friction for grease and rubber.

lol

thanks

 

[Tinker]

Did you try snugging it up by hand, barely feeling resistance using an end wrench, then backing it off 1/8 turn, & checking the reading on the fine fish scale? That would be your "friction force".