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#71485 01/11/2007 1:55 AM | Joined: Nov 2006 Posts: 125 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2006 Posts: 125 | What is the axle diameter for a 51 GMC 1/2 ton? I need to make sure mine are within tolerances at the place where they will contact the rear wheel bearing. | | |
#71486 01/11/2007 3:11 AM | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | If you have ridges on either side of where the bearing runs it is worn.
Does the shop manual give a spec for it?
What does it measure now, at the smallest part where the bearing runs? Then what does it measure at the largest part beside where it is worn?
Grigg | | |
#71487 01/11/2007 3:14 AM | Joined: Nov 2006 Posts: 125 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2006 Posts: 125 | I can't find anything about it in the shop manual. I think I measured 1.88 or 1.89 inches with a micrometer just in the center of it. It doesn't really have any definite ridges, not even enough to catch a fingernail on. | | |
#71488 01/11/2007 3:17 AM | Joined: Nov 2006 Posts: 125 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2006 Posts: 125 | I actually measured it with a dial caliper, so I am not sure if it actually reached far enough to get the measurement right. | | |
#71489 01/11/2007 3:20 AM | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | Then it may not be worn if you can't feel anything.
Measure the diameter, out to 0.001 or better, in many different places and lets hear the largest and smallest.
Grigg | | |
#71490 01/11/2007 3:25 AM | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | Do you have a micrometer?
How confident are you with taking accurate measurements with a dial caliper? If you have a good sense of feel you should be able to decide if it is worn too much or not with the calipers.
Grigg | | |
#71491 01/11/2007 4:02 PM | Joined: Nov 2006 Posts: 125 Wrench Fetcher | | Wrench Fetcher Joined: Nov 2006 Posts: 125 | I just think that the backside of the caliper may have hit the axle before the measuring arms reached the largest point of the axle. I will measure again from different sides and post the measurements. Does anybody have the correct diameter from the manual? | | |
#71492 01/14/2007 9:05 AM | Joined: Apr 2005 Posts: 2,832 'Bolter | | 'Bolter Joined: Apr 2005 Posts: 2,832 | If you have measuring tools you can measure the inside diameter of the bearing race since it never wears except in a total failure. This will be the OD of the axle where the bearing fits.
Evan
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#71493 01/14/2007 3:13 PM | Joined: May 2005 Posts: 8,878 . | | . Joined: May 2005 Posts: 8,878 | I think that the bearing rollers run directly on the axle shaft? | | |
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