Pinion Nut Torque Problem
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Member
Joined: Sep 2004
Posts: 29
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From: Buffalo NY
Pinion Nut Torque Problem
Well, I replaced the front oil seal of the differential using the procedure:
https://www.f150online.com/forums/20...04-2008-a.html
When I removed the nut, I counted 17 turns. When I installed the nut I couldn't get to 17 turns no matter how hard I pulled. So I left it at as "tight as I could get it".
Now I'm concerned that it may be too tight. It could be my imagination but it feels like the van doesn't roll at idle like it used to.
Also, I was doing some rear brake work and it seemed hard to turn the tires when the shoes were backed off.
(1) Is a too tight nut bad?
(2) What is the best way to tell if I have a problem and fix it?
(3) I never measured the rotation torque because I thought counting turns would be good enough. My shop manual says 8-14 in-lb. INCH POUNDS, not foot pounds, that is almost nothing.
(4) If it is too tight, the shop manual says "UNDER NO CIRCUMSTANCES SHOULD THE NUT BE BACKED OFF. INSTALL A NEW COLLAPSIBLE SPACER". I gather this spacer is behind the nut and flange somewhere but the manual doesn't say a thing about it.
What should I do?
Thanks In Advance,
Pete
https://www.f150online.com/forums/20...04-2008-a.html
When I removed the nut, I counted 17 turns. When I installed the nut I couldn't get to 17 turns no matter how hard I pulled. So I left it at as "tight as I could get it".
Now I'm concerned that it may be too tight. It could be my imagination but it feels like the van doesn't roll at idle like it used to.
Also, I was doing some rear brake work and it seemed hard to turn the tires when the shoes were backed off.
(1) Is a too tight nut bad?
(2) What is the best way to tell if I have a problem and fix it?
(3) I never measured the rotation torque because I thought counting turns would be good enough. My shop manual says 8-14 in-lb. INCH POUNDS, not foot pounds, that is almost nothing.
(4) If it is too tight, the shop manual says "UNDER NO CIRCUMSTANCES SHOULD THE NUT BE BACKED OFF. INSTALL A NEW COLLAPSIBLE SPACER". I gather this spacer is behind the nut and flange somewhere but the manual doesn't say a thing about it.
What should I do?
Thanks In Advance,
Pete
Senior Member
Joined: Jan 2002
Posts: 5,994
Likes: 221
From: Wilmington,NC
I had a bad pinon bearing way back on a 74 Ford. I disassembled it and cleaned it and used a new crush sleeve. I estimate it took about 400 ft. lbs. to crush that sleeve. I don't know if there are any guidelines on how much to torque the pinion nut without changing the sleeve.
Thread Starter
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Member
Joined: Sep 2004
Posts: 29
Likes: 0
From: Buffalo NY
Although the manual isn't specific I have picked up some (perhaps incorrect) information.
(1) Tighten the nut but not too much.
(2) Check the torque it takes to rotate the nut (wheels turn when doing this. Brake drums removed).
(3) Tighten 1/8 turn until the rotating torque returns to what I should have measured before removal but didn't.
(4) If you go too far the crush sleeve has to be replaced.
Some people said that they got to about 165 ft-lb when the rotating torque returned to the original value. The manual does say that the rotating torque should be between 8>14 inch-pounds for used bearings.
(1) Tighten the nut but not too much.
(2) Check the torque it takes to rotate the nut (wheels turn when doing this. Brake drums removed).
(3) Tighten 1/8 turn until the rotating torque returns to what I should have measured before removal but didn't.
(4) If you go too far the crush sleeve has to be replaced.
Some people said that they got to about 165 ft-lb when the rotating torque returned to the original value. The manual does say that the rotating torque should be between 8>14 inch-pounds for used bearings.
