HELP with bearing torque specs
Thread Starter
|
Junior User
Joined: Oct 2003
Posts: 82
Likes: 0
From: Mentor, OH
HELP with bearing torque specs
I repacked the front wheel bearings on my 03 F250 2wd 5.4, I have a Haynes book for the specs on torque. I want to know if this seems right. It said torque to 21ft\lbs while turning the rotor assy. Then back the nut off half a turn. Then torque to 18 in\lbs. Does this seem right? The 18 in\lbs seems very weak to me but I would like to know if anybody could tell me different. This would be alot of help. Thanks in advance, Michael
Fleet Mechanic
Joined: Nov 2003
Posts: 1,372
Likes: 14
From: West Cornwall, CT
On a 2WD truck you tighten the wheel bearings only enough to obtain the correct bearing end play.
Usually you want to obtain .001 to .005 inches of clearance. Tightening the wheel bearing nut down while rotating the wheel will seat the bearing fully. Backing the bearing nut off and lightly tightening (18 in-lbs sounds right) it will give you the clearance that you need.
Remember to install the bearing locknut and cotter pin assembly since it is the only thing that prevents the wheel bearing nut from moving.
Lou Braun
Usually you want to obtain .001 to .005 inches of clearance. Tightening the wheel bearing nut down while rotating the wheel will seat the bearing fully. Backing the bearing nut off and lightly tightening (18 in-lbs sounds right) it will give you the clearance that you need.
Remember to install the bearing locknut and cotter pin assembly since it is the only thing that prevents the wheel bearing nut from moving.
Lou Braun
Fleet Mechanic
Joined: Feb 2007
Posts: 1,852
Likes: 39
To me, it is the first number that seems low. I know that for my Corporate axle on my "other" brand truck, you're supposed to run it up to some really huge number, I think it was 150 lb/ft, then back it off, snug it again to a lesser number, and then back it off to set the end play. But then again, that is a full-floating drive axle, totally different beast.
But Lou Braun is right, there will be a spec for end play, and usually that is accomplished by adjusting the nut some fractional number of turns back from snug. You can easily calculate it, if you know what the end play spec is, and what the thread pitch of the adjusting nut is.
But Lou Braun is right, there will be a spec for end play, and usually that is accomplished by adjusting the nut some fractional number of turns back from snug. You can easily calculate it, if you know what the end play spec is, and what the thread pitch of the adjusting nut is.
Thread
Thread Starter
Forum
Replies
Last Post
cowmilker08
1994.5 - 1997 7.3L Power Stroke Diesel
13
Jul 19, 2013 11:45 AM
xl1200c
Clutch, Transmission, Differential, Axle & Transfer Case
1
Nov 5, 2011 04:46 PM
JaysRanger
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
7
Oct 30, 2009 11:48 PM
