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05-26-2016, 03:10 PM | #1 |
Join Date: Jun 2015
Location: Escondido, CA
Posts: 117
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Rear axle bolt torque?
I brought my RX3 into a local shop to have a new rear tire installed and replace the three rear wheel bearings, this morning.
The shop mechanic mentioned that the Torque Specification of 70-80 N.M., might be too tight, because it appears to be compressing the swing arm (three threads showing). He thought that this swing arm compression, may be a cause for the premature bearing failures. He felt that my rear wheel bearing were ok at 6300 miles, and did not replace the OEM bearings at this time. Has anyone else noticed the same compression of the swing arm when tightening the rear axle bolt to 75 N.M. ?
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Dave |
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05-26-2016, 04:14 PM | #2 |
Join Date: Jun 2015
Location: Las Vegas
Posts: 158
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I don't know what 80nm "feels like" out on the trail, when I do a tube change. So I just go with "pretty snug" and I've never had problems.
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05-26-2016, 04:27 PM | #3 |
Join Date: Jun 2015
Location: Escondido, CA
Posts: 117
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Dave |
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05-26-2016, 05:29 PM | #4 |
Join Date: Sep 2014
Location: Arvada, CO
Posts: 1,004
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Thanks for the information!
My understanding of the rear axle torque spec was 50 ft-lbs (67 NM), not 70-80 NM. In my opinion, 80 NM would absolutely be too much. I'm pretty sure Gerry used the full 50 ft-lbs (70 NM) when he installed my rear wheel. It stayed put even though the right side adjuster nut fell off (that one was undertorqued).
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Red 5 standing by! 2015 CSC red RX3 with 19" front wheel, Shinko 804/805, skid plate, tall seat, 13T/45T sprockets, progressive shock, Winyoochanok windshield, GENSSI LED headlight, SW-Motech tankbag, Shorai Lithium battery 2014 Ural Patrol |
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05-26-2016, 05:58 PM | #5 | |
Join Date: Jun 2015
Location: Escondido, CA
Posts: 117
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Quote:
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Dave |
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05-26-2016, 08:33 PM | #7 |
Join Date: Jun 2015
Location: Escondido, CA
Posts: 117
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Here is what my Owner's Manual reads. Which is most current and correct?
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Dave |
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05-26-2016, 09:52 PM | #8 |
Join Date: Jun 2015
Location: Escondido, CA
Posts: 117
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I did a comparison of the Torque values posted by Ron in Ft Lbs to my Owner's Manual using the conversion factor of 1.3556 ft. Lbs. = 1 NM. Actually the values are very similar. The Front and rear axle nuts are the Same, 70 - 80 NM NOT 50 Ft Lbs. The Ft Lbs chart calls for 52-59 Ft Lbs ( average of 55.5 Ft Lbs Not 50 as previously mentioned.
The Key question is are BOTH charts WRONG, and should we be using 50 Ft Lbs (68 NM rather than the 75 average NM on the Owner's Manual? Is the Owner's Manual / CD Wrong?
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Dave |
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05-27-2016, 01:35 AM | #9 |
Join Date: Jun 2015
Location: Las Vegas
Posts: 158
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Again, "Snug"
Who carries a torque wrench (except maybe Spud) when they are out adventure riding? If all you got is the thin stamped wrench and you need to get your rear wheel off, you are going to have a hell of a time if it was spec'd down to 80nm in the shop. And you'd never be able to guess that when you got your wheel back on anyway, out where it matters most. As long as you always put the "Nut-Side" to the right, it won't come undone from rotational vibration. Unless you ride backwards a lot. |
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05-27-2016, 09:54 AM | #10 | |
Join Date: May 2007
Location: Warshington
Posts: 928
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Quote:
Agree with you Eco, I'm a righty tighty, lefty loosey, if it ain't loose it's good to go, if it's loose tighten it to snug plus a bug. "Nut side on right" now that's something I didn't know. Never had a axle nut come loose with just using the tools on the bike and a smidge of bicept. rj
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05-27-2016, 07:35 PM | #11 |
Join Date: Jun 2015
Location: Las Vegas
Posts: 158
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It's the reason why the counter sprocket nut always comes loose, and needs that keeper tab bent in place. If it was a left hand thread it would never come loose, and perhaps be really hard to get off.
Have you ever noticed that the left bicycle pedal is left hand threaded? It's to keep you from pedaling it off in about 10 strokes. |
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05-27-2016, 10:53 PM | #12 |
Join Date: Feb 2016
Location: George West, Texas
Posts: 4,097
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Same goes for the lugs on the left side of these guys
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***************************************** 2015 Bashan"Blaze" BS250GY-31 (DB-07K-250) GONE 2017 Suzuki V Strom 650 XT "We are all born ignorant, but one must work hard to remain stupid." ~Benjamin Franklin~
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05-31-2016, 12:01 AM | #13 | |
Join Date: Oct 2015
Location: Berthoud, CO
Posts: 205
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Bicycle pedals: If you were to hold the pedal spindle so that it did not rotate and run the cranks forward the spindle would unscrew from the crank! But the ball bearings reverse the force on the spindle and tighten the spindle. Old military trucks and Chrysler Corp cars. There may have been a theoretical reason to use left hand threads but for practical applications there was no advantage, and the disadvantages of extra part numbers and confusion. FWIW: years ago when I was working in a bicycle shop a customer brought in a department store bike that he could not get the pedals completely in. He had FORCED the R in the L and the L in the R, each more than half way. We took them out with a BIG wrench, chased the threads, and put them in properly, with Loctite.
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Dan CSC RX3 Cyclone, CSC TT250, Moto Guzzi V7 II, KLR650 |
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05-28-2016, 02:05 AM | #14 | |
Join Date: Jul 2008
Location: Idaho
Posts: 25,054
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Quote:
I have never used a torque wrench on an axle nut. I just tighten the axles nuts "snug."
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Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." Mark Twain 2015 Zongshen ZS250GY-3 (RX3) 2006 Zongshen ZS200GY-2 (Sierra 200) 2005 Honda XR650L 2004 Honda CRF250X 1998 Kawasaki KDX220 Mods made to my Zongshen ZS200GY-2: http://www.chinariders.net/showthread.php?t=6894 |
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05-30-2016, 11:19 AM | #15 |
Join Date: Mar 2010
Location: Volcano, Ca
Posts: 7,112
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Adjusted the chain and aligned the wheel. Torqued to 50 lbs. Seemed "snug" enough.
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"Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350 |
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