Front wheel job: 48 in-lb = hand / preload = move?

[landtoy80]

Read this https://forum.ih8mud.com/showthread.php?t=17910&page=2 thee should be some help in there some where.
From what I understand, you read the scale when the rotor starts to move. But, try it after rotating the rotor several times.

 

[scottm]

Now that I've done it with the fish scale, I may not bother next time. I tightened the hub nut finger-tight and torqued the lock nut to spec, and still got the upper range of starting force on rotating the hub. It was still good when I checked the next day. I did rotate the hub several times before each measurement, just to make sure the grease was evened out.

 

[landtoy80]

Its just important to make sure there isno play in the rotor.

 

[scottm]

Oh yeah, I did the torque-n-turn from the FSM before loosening and putting on the locknut.

 

[dclee]

I use a digital trigger-pull scale which goes up to 14 pounds in 10ths of an ounce. Very accurate, but then again, I've had to do it on the trail without such luxuries. Basically, the nut should be tight enough such that the wheel spins freely, but does not rock back and forth when gripped at 12 and 6 o'clock and wiggled.

I've also found, at least on my `94, that you need to under-tighten just a bit when setting pre-load, since when you finally tighten the lock nut, it will tighten the hub on the spindle just a hair more, and put you out of the spec'd range if you're not careful. I don't remember if this was the case on our `97, but I believe so.

Also, after doing three complete front axle/birf overhauls on two different trucks I've never locked the diffs for any job, and never had a problem. However, I'll now take a closer look at the FSM. Maybe I've been lucky up until now?

 

[landtoy80]

I've also found, at least on my `94, that you need to under-tighten just a bit when setting pre-load, since when you finally tighten the lock nut, it will tighten the hub on the spindle just a hair more, and put you out of the spec'd range if you're not careful.

I found if you take a screw driver and hammer, force the adjusting nut to loosen till the lock washer stops it from turning you might be back in spec. When you get to 47ft/lbs on the lock nut the adjusting nut tightens within the free play of the lock washer.

 

[e9999]

I don't use the fish scale method so my lack of response is not an indication that your understanding is correct. If you yank the flange be sure to clean the bushing. That bastard caused me plenty of grief.

LT, what bushing is this?

E

 

[e9999]

Had a peek in the knuckle, all appears well, no Birf soup in there, just good looking grease. Did not pull the axles this time around. Was just a social visit in there, you know, just for fun.
So, I repacked the bearings, put a new oil seal jammed a bunch of good grease in the hub, coated everything that needed it and attempted the preload. Now, there I got into some uncertainty. Did the 43/turn/43/loose. My wrench only starts at 10 lbft so guesstimated 4 on the adjusting nut, preload was 4 lbs on my trusted RCBS Premium trigger gauge. Guesstimated 6, preload still around 4. Guesstimated 8, preload maybe 5, same at 10. Geez. Maybe did too good a job at lubing it all up?

So, am I supposed to keep tightening the adjusting nut until I get to 6 or 7 on the preload? Seems like that would be quite a bit more than 4 lbft. That OK?

Anybody?

Thanks
Eric

 

[Rookie2]

Had a peek in the knuckle, all appears well, no Birf soup in there, just good looking grease. Did not pull the axles this time around. Was just a social visit in there, you know, just for fun.
So, I repacked the bearings, put a new oil seal jammed a bunch of good grease in the hub, coated everything that needed it and attempted the preload. Now, there I got into some uncertainty. Did the 43/turn/43/loose. My wrench only starts at 10 lbft so guesstimated 4 on the adjusting nut, preload was 4 lbs on my trusted RCBS Premium trigger gauge. Guesstimated 6, preload still around 4. Guesstimated 8, preload maybe 5, same at 10. Geez. Maybe did too good a job at lubing it all up?

So, am I supposed to keep tightening the adjusting nut until I get to 6 or 7 on the preload? Seems like that would be quite a bit more than 4 lbft. That OK?

Anybody?

Thanks
Eric

Hmm... that's odd. Mine was the other way around. Seems like I was battling to stay below the top end of the spec. on the pre-load. Make sure you're reading the right units on the spring scale (not trying to insult you.., and don't ask why I mentioned it).


Rookie2

 

[e9999]

well, I am only somewhat trusting my trigger gauge.

Funny thing is that with a fish scale it's probably made to read heavier (keeps the fishermen happier, you know. Ask Dan... )
But then with a trigger gauge, it probably reads low. Keeps the DIY smiths happy you know. Ask Dan...

Complicated world.

Will keep on tightening the adjusting nut and see what happens..

E

 

[landtank]

I lock the nuts down to 20ftlbs, as you probably have read. Never any issues with heat or loosening. So I wouldn't be too concerned unless you exceeded that.

 

[e9999]

well, tightened the adjusting nut to 14 ftlb (or at least that's what I dialed the wrench to, but that's really low on the scale, so who knows. Need to buy a more sensitive one). This gave about 6 lbs preload. Then when I tightened the locknut to 47, I ended up with about 8-9 bls preload. Right in the range!

Putting it all back together was a cinch - except for the snap ring. Really useful to have snap ring pliers for that one... And I'm afraid it's a big bigger than before. Probably a good idea to replace the ring too. So all is well for now, except I have a dubious oil seal and the old bearings are still in. Can't wait to do the whole thing completely soon...

Ya know, what I really like is to take something apart, you struggle, you have to figure it out, it's all dirty and messy. And then you put it back together, clean, knowing what to do. All slides smoothly together... What a trip!

E

latest: oooooh! Went for a spin, the side I just did had a cooler hub afterwards than the opposite side, oooooh yessss! That baby is happy now!!!