 Rear wheel bearings--play or not, how good is good |
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| barefoot |
 Dec 23 2013, 09:43 AM
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#1
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Senior Member  Group: Members Posts: 1,412 Joined: 19-March 13 From: Charleston SC Member No.: 15,673 Region Association: South East States 
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Just finished refresh of first side of rear suspension, still waiting for correct caliper rebuild kit to replace dust boots.
Question is how much free play is tolerable for the rear wheel bearing. With axles and caliper removed i get about 3/16 possible movement at the tire OD when i rock the wheel side to side (in at the back, out at the front). bearing spins freely with no noise. While I'm in there, i could go for new bearings. Haven't done the other side yet, so no comparison. What do the experts say ???  |
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| 0396 |
Dec 23 2013, 10:00 AM
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#2
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Advanced Member Group: Members Posts: 2,046 Joined: 13-October 03 From: L.A. Calif Member No.: 1,245 Region Association: Southern California |
Interesting question, free bump.
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| rgalla9146 |
Dec 23 2013, 10:25 AM
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#3
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Advanced Member Group: Members Posts: 4,781 Joined: 23-November 05 From: Paramus NJ Member No.: 5,176 Region Association: None
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QUOTE(396 @ Dec 23 2013, 11:00 AM)  Interesting question, free bump. No use feeling for play with stub axles removed. Put the stub back in, then check. And dont' roll the car or put weight on it without the stubs installed and tight. |
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| barefoot |
Dec 23 2013, 10:50 AM
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#4
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Senior Member Group: Members Posts: 1,412 Joined: 19-March 13 From: Charleston SC Member No.: 15,673 Region Association: South East States
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QUOTE(rgalla9146 @ Dec 23 2013, 11:25 AM) QUOTE(396 @ Dec 23 2013, 11:00 AM) Interesting question, free bump. No use feeling for play with stub axles removed. Put the stub back in, then check. And dont' roll the car or put weight on it without the stubs installed and tight. Further explanation please, guess i don't understand what rigidity the stub axles add to this equation. They provide no further bearing positioning and I'd think the CV joints add very little to rigidity of the system, but I'm a newbe here, so fill me in. |
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| ThePaintedMan |
Dec 23 2013, 10:57 AM
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#5
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Advanced Member Group: Members Posts: 3,887 Joined: 6-September 11 From: St. Petersburg, FL Member No.: 13,527 Region Association: South East States
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QUOTE Further explanation please, guess i don't understand what rigidity the stub axles add to this equation. They provide no further bearing positioning and I'd think the CV joints add very little to rigidity of the system, but I'm a newbe here, so fill me in. The presence of the stub axles and the pressure exerted by the axle nut sandwiches the bearing tight, providing the appropriate force on the races and the balls inside of them. Without the whole thing being torqued down, the balls do not fit tightly against the race. This is why people are told NOT to roll the car around or drive it without them being torqued down. It can very, very quickly ruin the balls and/or races, leading to premature failure. It makes more sense when you have a bearing in your hand, or if you remove the rotor and bearing retainer. You can usually pull the outer half of the inner race off with just a fingernail, exposing the balls. You'll see that there is nothing really holding the race on but the suction from the grease. |
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| barefoot |
Dec 23 2013, 12:11 PM
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#6
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Senior Member Group: Members Posts: 1,412 Joined: 19-March 13 From: Charleston SC Member No.: 15,673 Region Association: South East States
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QUOTE(ThePaintedMan @ Dec 23 2013, 11:57 AM) QUOTE Further explanation please, guess i don't understand what rigidity the stub axles add to this equation. They provide no further bearing positioning and I'd think the CV joints add very little to rigidity of the system, but I'm a newbe here, so fill me in. The presence of the stub axles and the pressure exerted by the axle nut sandwiches the bearing tight, providing the appropriate force on the races and the balls inside of them. Without the whole thing being torqued down, the balls do not fit tightly against the race. This is why people are told NOT to roll the car around or drive it without them being torqued down. It can very, very quickly ruin the balls and/or races, leading to premature failure. It makes more sense when you have a bearing in your hand, or if you remove the rotor and bearing retainer. You can usually pull the outer half of the inner race off with just a fingernail, exposing the balls. You'll see that there is nothing really holding the race on but the suction from the grease. Thanks much for the info, I'll put the axles back in before rolling the chassis. To maintain alignment. I drilled and pinned the outer bracket up into the frame so I could maintain whatever alignment existed when i started. |
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Posts in this topic
barefoot Rear wheel bearings--play or not Dec 23 2013, 09:43 AM
ThePaintedMan You can't get a good estimate of bearing movem... Dec 23 2013, 10:27 AM Cap'n Krusty
You can't get a good estimate of bearing move... Dec 23 2013, 11:02 AM ThePaintedMan
Most folks do the job with the arms in the car. ... Dec 23 2013, 11:13 AM rgalla9146
[quote name='Cap'n Krusty' post=... Dec 23 2013, 12:49 PM |
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