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Old 04-13-2015, 01:18 PM   #1
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Alcoa wheel lug lug nut covers

I just asked this question over in the Monaco forum but I realized not only Monaco uses ALCOA wheels. I took the 2 part lug covers off to polish the wheels and now I'm having trouble getting the caps to tighten up enough not to louse them along the way. there only supposed to tighten to 20 foot pounds. Is there a experienced wheel polisher out there to help with how to put them on correctly?
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Old 04-13-2015, 04:05 PM   #2
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Quote:
Originally Posted by johnboy2 View Post
I just asked this question over in the Monaco forum but I realized not only Monaco uses ALCOA wheels. I took the 2 part lug covers off to polish the wheels and now I'm having trouble getting the caps to tighten up enough not to louse them along the way. there only supposed to tighten to 20 foot pounds. Is there a experienced wheel polisher out there to help with how to put them on correctly?
Johnboy2,
I'm at a bit of a loss here. Most Alcoas do not have any sort of cover or, lug nut covers that I know of. At least my wheels are held on by regular lug nuts with Stainless steel lug nut covers. Those covers are removed with a special set of rubber coated/tipped pliers that grab the covers to pull them off. Then, you simply use a regular 1 5/16" or, 33MM Socket to remove the lug nuts which, are on there with 450 ft. lbs. of torque

But, I'm just not familiar with your situation. A picture would be really nice to edumacate me.
Scott
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Old 04-13-2015, 04:45 PM   #3
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These are Alcoa products pn 76188. They have a special plastic wrench and are to be torqued to about 20 foot pounds, that much is on the Alcoa web site.
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Old 04-13-2015, 05:01 PM   #4
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These are Alcoa products pn 76188. They have a special plastic wrench and are to be torqued to about 20 foot pounds, that much is on the Alcoa web site.
I've seen those used primarily on big trucks with the larger center "hub" caps (aka, Alcoa Interlocking Hub Cover System). The truck style hub cap is held on by the lug nut covers shown and is quite a bit more expensive than the simple press on lug nut covers found on most MH's with the "baby moon" centers.

I've never lost a cap or cover on my OTR trucks and when I got tired of losing & replacing baby moons on the coach I replaced them with the truck style cap and the covers shown in your pic. Haven't lost a center cap or lug cover since. I've never used a torque wrench; just snug 'em up. Hope this helps

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Old 04-13-2015, 05:37 PM   #5
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That's the system looks great and very secure the outer lug cover acts as a compression nut for the inner nut hugger/clamp. but what is the secret of putting them back on. nice pix by the way do you have the system?
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Old 04-13-2015, 06:44 PM   #6
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That's the system looks great and very secure the outer lug cover acts as a compression nut for the inner nut hugger/clamp. but what is the secret of putting them back on. nice pix by the way do you have the system?
Yes, I've got them on 2 OTR trucks and on the MH. However, mine screw directly onto the stud threads. I do not torque them; in fact, I remove or install them by hand and would be surprised if I use 20flbs of torque. The ratcheting action as they are tightened works very well. Is it possible yours have been damaged by over tightening?

I visited the Alcoa site and didn't see the torque recommendation listed? I did notice the following for the stud mount and the two piece like yours:

* Requires a minimum of 4 threads per stud, 6 recommended

Picture of one of mine for comparison:
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Old 04-13-2015, 06:55 PM   #7
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Yes that's the other style. and snug sounds right, after reading about 20 foot pounds of torque that's only l little over snug. I think to clamp down on the inner ring. I'm going to call Alcoa tomorrow to see if I can get anything from them. It's not rocket science but I'm baffled. Thay must be somewhat uncommon on MHs
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Old 04-14-2015, 03:27 PM   #8
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So the answer is to grease the threads in the cap nut. Thanks Bob at Alcoa customer service. It sure looks nice with wheels polished. Anybody think it will improve my fuel economy?
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Old 04-14-2015, 03:44 PM   #9
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If you need replacement parts, you can get them directly from:
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Old 04-14-2015, 04:22 PM   #10
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Woops!! just saw I have no idea how to take pixs. Oh well I'm getting old.
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Old 04-14-2015, 05:48 PM   #11
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I've got the covers that cover the front hubs. I had my hubs serviced and they both fell off within two days. The only thing I can think is the steel tension clips were rusted and they broke when removed. Now I have to find new ones.
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Old 04-14-2015, 06:08 PM   #12
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Davdeb1, use the sets listed in the link above. The lug nut covers hold the centers on unlike the smaller "baby moon" style which are standard on most MH's and held on by spring clips or tabs. I've never been able to keep the "moons" on the coach for any length of time...
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Old 04-14-2015, 06:10 PM   #13
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So the answer is to grease the threads in the cap nut. Thanks Bob at Alcoa customer service. It sure looks nice with wheels polished. Anybody think it will improve my fuel economy?
John, glad you found the problem and thanks for sharing! You might want to turn it upright before testing for mpg gains....
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Old 04-14-2015, 08:15 PM   #14
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Davdeb1, use the sets listed in the link above. The lug nut covers hold the centers on unlike the smaller "baby moon" style which are standard on most MH's and held on by spring clips or tabs. I've never been able to keep the "moons" on the coach for any length of time...
Thanks for the advice, I will get them ordered.
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