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07-01-2009, 08:37 PM
| #1 |
| Quarry Creeper   Join Date: Mar 2009 Location: Redmond
Posts: 454
|  Possible sloppy knuckle fix So I headed over my friends house yesterday to get some machining done after yet another stripped out housing for the threads for the knuckles. I believe that the brass bushings are a little to sloppy causing the knuckle to move side to side even though the bolts are loose. So I decided to up the size of the bolts from a 3mm to a 4mm and my buddy made some bushings that look exactly like the ones from RC4WD on his lathe. He made the bushings out of an SAE 841, also known as a sintered bronze. But he made the bushings a slip fit in the housing but tighter than what RC4WD was making and the actual hole size was also a tighter fit. Anyways we got it all together and I still decided to put the blue loctite in just in case. But the knuckles are nice and tight when the 4mm bolts are tight and there is no slop, side to side at all. So we took it out for about 45 min. of crawlin at a local spot here and I checked them when we were done and the bolts had not come loose. I will be keeping an eye on these though when I go crawlin again.     |
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07-01-2009, 09:34 PM
| #2 |
| Black Label Crawlers  Join Date: Sep 2008 Location: behind the wheel of a monster truck...
Posts: 2,892
| Yah I was wondering if anyone else was having the "slop" issues with the Bully 2's..I have one side that is worse than the other but they are sloppy on both sides.Haven't had the screws come loose on me yet..But I havent bashed on mine to much yet.. |
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07-02-2009, 06:27 AM
| #3 |
| Pebble Pounder Join Date: Mar 2008 Location: K-ville
Posts: 135
| Is RC4wd going to balls up and addmit that this is a problem and fix it before it ruins the bully name. Or are they going to keep spreading the problem and dropping screws everywhere. I'm not to happy about paying the money for axles that are suppost to be the best and ready for rocks. And then 30min of play time and they fall apart. I almost wish I still had my AX-10 |
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07-02-2009, 06:53 AM
| #4 | |
| RCC Addict Join Date: Jul 2008 Location: Sin City
Posts: 1,344
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07-02-2009, 10:00 AM
| #5 | |
| Rock Stacker Join Date: Oct 2008 Location: Ottawa Canada
Posts: 68
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Bullys are great axles! You need to give them a chance and get to know them. | |
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07-02-2009, 10:42 AM
| #6 |
| Quarry Creeper Join Date: Mar 2009 Location: Redmond
Posts: 454
| I actually did email RC4WD about this problem and I never heard back from them. Although I think if others have emailed them then I believe they would probably take care of the problem. |
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07-02-2009, 02:33 PM
| #7 | |
| RCC Addict Join Date: Jul 2008 Location: Sin City
Posts: 1,344
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07-02-2009, 03:30 PM
| #8 | |
| Quarry Creeper Join Date: Mar 2009 Location: Redmond
Posts: 454
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07-02-2009, 04:01 PM
| #9 |
| Black Label Crawlers Join Date: Sep 2008 Location: behind the wheel of a monster truck...
Posts: 2,892
| I am in contact with Racer4Life about this..So we'll see what happens.RC4WD has always had awesome customer service with me,so I would say if they find it to be an issue they will do something about it for sure. |
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07-02-2009, 04:31 PM
| #10 | |
| Quarry Creeper Join Date: Mar 2009 Location: Redmond
Posts: 454
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07-02-2009, 05:27 PM
| #11 | |
| Pebble Pounder Join Date: Mar 2008 Location: K-ville
Posts: 135
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07-02-2009, 11:23 PM
| #12 |
| MF&W   Join Date: Feb 2009 Location: Gold Bar
Posts: 231
| Ok did the kids knuckles today. Discovered one of his was stripped when showing Diamond how well my loctite held  This was with the bully2 pieces. On Diamonds he had the cast tubes but machined knuckles. Seams they sent him 2 of one side so we did his old knuckles for now. To make sure the knuckles got drilled nice and strait we used a drill bit that fit the knuckle to get it all strait in the vise. For the machined knuckles it was a #14 (.1820) bit the cast was a #16 (.1770) bit. The cast knuckles are fairly new and the machined ones have plenty of runs im sure.   Not a huge difference in size. The holes were drilled out to a #3 (.2130) drill. Would have liked to go bigger but the machined knuckles do not give you much room on the inside for the flange of the bushing. One could get in there with a dremel and open it up some but we choose not to. The cast knuckles do have a nice flat area. Sorry no picture of that.  Just some pictures of making the bushing.     I don't recall the thru hole sixe but its just big enough for the M4X8 Button head screws to go through. Nice and snug  The flange on the bushing is about .020 thick with the overall hieght being about .190. Never really measured the O.D where it goes into the knuckle it was more of a see if it fits if not take some more off deal. The goal was for a nice fit which is what we got. It is kinda a hand fit thing to get it all nice and tight. No surprise really to me they are a bit sloppy from the get go. If they took the time we did they would get flamed for being slow on getting axles out. The tubes were drilled and tapped for the M4 button heads. It we be best to use the same method with the drill bit like the knuckles. That requires removing them and the steer servo so we used the (eyeballl) method to get the holes drilled nice and strait without removing them. I used blue loctite on one side and green on the other. We will see what happens. Just when tightening and removing the screws during fitting they (feel) better than the M3 screws. Not sure it its the size or maybe better threads are better but when you go to loosen them you get a nice pop when the first bust loose. My Rock force uses M4 screws for the knuckles and I have yet to find one of those loose. They thread into the pot metal knuckles with no loctite either! Hopefully this will cure the problem but time will only tell. Gots to go now and unbend the kids rear bent link. Somehow his wheelbase is 12 on one side and 12.5 on the other  .  |
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07-03-2009, 05:49 AM
| #13 |
| Rock Stacker Join Date: May 2008 Location: Portugal
Posts: 79
| Neither I believe this will happen. I got the axles Bully last week and already I'm sorry to have pasted the screws. I hope the RC4DW have solution to this problem because I am in Portugal and here where I live do not have anyone that I can assert. |
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07-21-2009, 07:45 AM
| #14 |
| Motorama Bound  Join Date: Oct 2005 Location: W.Pa.C.
Posts: 3,231
| Has anybody heard back from RC4wd yet? As somebody who has also recently purchased a set of Bullys (but not run them yet), I'm definately interested in how they're handling this. |
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07-21-2009, 09:43 PM
| #15 |
| I wanna be Dave Join Date: Sep 2004 Location: SF Bay Area
Posts: 3,417
| We already working on an update. We will post more info on our section next week. We check email through out the day, including during night time. We have yet got any emails yet. |
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07-21-2009, 09:56 PM
| #16 | |
| MF&W Join Date: Feb 2009 Location: Gold Bar
Posts: 231
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Good to hear! Well about the update part...not sure why you have not heard anything yet  | |
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07-21-2009, 10:24 PM
| #17 |
| support@rc4wd.com  Join Date: Nov 2007 Location: Lancaster, Ohio
Posts: 1,429
| I should have a proto next week with yet another fix for these and hopefully the last  . There will be more threads add for the screws to grab and the sleeve will be made for tighter tolerances. |
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07-22-2009, 01:57 AM
| #18 |
| Quarry Creeper Join Date: Aug 2004
Posts: 350
| keeping an eye on this...... looking forward to getting my axles hung on a chassis and out on the rocks. |
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07-22-2009, 10:32 PM
| #19 | |
| I wanna be Dave Join Date: Jan 2009 Location: 801-Utah
Posts: 2,332
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07-23-2009, 03:30 PM
| #20 | |
| I wanna be Dave  Join Date: Dec 2005 Location: Gold Bar
Posts: 2,085
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