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Re: Wheel bearings 1954 Deluxe
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Joined:
2007/3/14 16:01
From New Jersey
Posts: 16072
Just reinforcing Don's comment, the taper surfaces must be CLEAN and DRY, very important!!

Torque the nut to spec and recheck it again after a hundred or so miles.

Posted on: 5/21 13:58:25
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Re: Wheel bearings 1954 Deluxe
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Joined:
2018/6/30 14:46
From River Falls, WI, USA
Posts: 22
Appreciate the help. I didn't find a totq spec in manual I assume torque per nut/thread size?

Posted on: 5/21 19:00:09
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Re: Wheel bearings 1954 Deluxe
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Joined:
2007/3/14 16:01
From New Jersey
Posts: 16072
Its in the manual, page 10 of the Rear Axle section, 200-270 ft-lbs.

Posted on: 5/21 19:08:22
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Re: Wheel bearings 1954 Deluxe
Not too shy to talk
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2018/6/30 14:46
From River Falls, WI, USA
Posts: 22
Not sure how I missed it. Thanks much!

Posted on: 5/22 3:43:45
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Re: Wheel bearings 1954 Deluxe
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2016/3/13 15:24
From Coalmont, B.C., Canada
Posts: 909
Just curious, Dave - is 200 - 270 ft lbs not quite a range?? That's over a 30% 'from/to' for the spec; seems like a lot?? Chris.

Posted on: 5/22 15:14:40
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Re: Wheel bearings 1954 Deluxe
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Joined:
2007/3/14 16:01
From New Jersey
Posts: 16072
The range is perhaps the result of there being 1/6 of a rotation between cotter pin positions.

Posted on: 5/22 16:21:09
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Re: Wheel bearings 1954 Deluxe
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2016/3/13 15:24
From Coalmont, B.C., Canada
Posts: 909
Got it... makes sense, thanks for clarifying. Chris.

Posted on: 5/22 21:14:53
_________________
'If you think you can, or you think you can't, you're right!' Henry Ford

1939 Six, Model 1700

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Re: Wheel bearings 1954 Deluxe
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Joined:
2008/2/16 15:39
From Santa Fe
Posts: 5399
Is the main cause of broken rear axles not having the nut torqued correctly?

Posted on: 5/23 10:23:51
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Re: Wheel bearings 1954 Deluxe
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2013/12/21 11:14
From Scottsdale, AZ
Posts: 211
JW, One of the failure modes, that is a ‘one per rev’ fatigue failure at the fillet radius between the taper and thread, is believed to be a result of taper/hub relative motion. Insufficient torque may start that whole process. I know for a fact that after I replaced my ’48 broken axle I went back 100-200 miles later and found the torque was well below the minimum required. Trust me, I know it was ‘in spec’ at 0 miles.

I sent my broken parts to some materials engineers that reported back the mode of failure. I also have some good close-up photos showing the multiple origin planes.

In addition, tribal wisdom for the folks that care for other antique cars that have the same tapered design swear by the ‘re-check the torque’ process.

If you see a 45 degree fracture inboard of the bearing that would not be a result of low nut torque.

dp

Posted on: 5/23 11:15:25
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Re: Wheel bearings 1954 Deluxe
Not too shy to talk
Joined:
2018/6/30 14:46
From River Falls, WI, USA
Posts: 22
Good to know, will recheck the torque after I get some mileage on the car.
Thanks!

Posted on: 5/25 6:15:12
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