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06-09-2011, 01:29 PM
| #1 |
| Rock Stacker Join Date: Sep 2010 Location: olathe
Posts: 66
|  new to the mrc and already got problems
hello all i recently bought the mrc pro roller while it was on sale at horizon hobby parts are listed here esc associated micro xps servo futaba 3003 radio novak polaris 75mghz am(eventually to be spectrum) motor team losi frenzy 370 battery 1600 nimh ok so i know this is far from pro spec level but im mostly a basher i will probably never use this in a comp but i am having trouble getting a pinion that will mesh with the spur without the grub screw hitting the spur gear so for now the only pinion i have in my parts is 18t so i have a ton of unneeded wheel speed also i am having trouble with my front right wheel hitting the servo mount and grinding so i am not getting a full steer to the right i did use the search button to try and find this stuff and a didnt not find what i was looking for please help me if you can i have not been in crawling very long the only other crawler i have is a modded txt-1 but its different than this small scale stuff |
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06-09-2011, 01:43 PM
| #2 |
| Rock Crawler Join Date: Feb 2010 Location: eugene
Posts: 549
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Sounds like you and i are in the same boat. I bought one last week and im having the same problems. Im using a losi insane 370 motor and i only have about 2/3 of the set screw on the motor shaft so it will barely clear the spur gear. I also had the same problem with the tire hitting the servo. Im using a hitec 645. I ended up center mounting, using a metal servo arm and the shorter drag link. I should be starting a build thread tonight after i get off of work...so you can see pics if you wanted too...
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06-09-2011, 02:42 PM
| #3 |
| RCC Addict Join Date: Jan 2010 Location: Dallas
Posts: 1,848
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Welcome to the neighborhood. Post up pics so we can see your issues and better help you. The pinion might be better flipped or you might not have the right kindof pinion. Also the front wheel rubbing may simply be something a dremel can fix! A bunch of guys including me run the red junfac wideners. Be careful when tightening them as they are designed for a larger axle pin. Most importantly be careful with those cvd axles. They tend to get stressed under serious power while turning and snap. Sometimes limited steering is never a bad thing.
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06-09-2011, 04:19 PM
| #4 |
| Rock Stacker Join Date: Sep 2010 Location: olathe
Posts: 66
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i ended up grinding the back of the pinion a bit so it would fit but the servo may have to be grinded down as well i will try to post pics tomorrow as i am busy the rest of the night but also what is some good gear recommendations with the stock 60t spur gear thanks boneskid |
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06-09-2011, 07:57 PM
| #5 |
| I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
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It appears most brushed motors need a spacer plate between the motor & motor mount. As noted, another option is modifying pinion gears, but that sucks when you lose one at a comp and nobody has a similar modded pinion with the same tooth count.  |
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06-09-2011, 08:12 PM
| #6 |
| 5th D Owner/Driver   Join Date: Dec 2005 Location: Snoqualmie, Wa.
Posts: 1,916
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If you want to run larger pinions (17T +) try using the 58T spur gear from part #LOSB1068 spur gear bag. Robinson Racing makes pinions that work just fine without the grub screw hitting, like the 19T pinion #1619.
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06-10-2011, 07:18 PM
| #7 |
| Rock Stacker Join Date: Sep 2010 Location: olathe
Posts: 66
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ok so i ran out of time to post pics of my problem but i have another question does the carbon fiber on the chassis have to be sealed with anything i read an article that said to use super glue but does it have to happen? Thanks, Boneskid |
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06-10-2011, 08:06 PM
| #8 |
| 5th D Owner/Driver Join Date: Dec 2005 Location: Snoqualmie, Wa.
Posts: 1,916
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When I ran mine without the CA glue I did crack the front bottom edge of the chassis. Since CA glueing I've beat the piss out of it with no issues.  |
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06-11-2011, 07:55 AM
| #9 |
| Rock Stacker Join Date: Sep 2010 Location: olathe
Posts: 66
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ok i think i might glue it then
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06-14-2011, 04:01 PM
| #10 |
| Rock Stacker Join Date: Sep 2010 Location: olathe
Posts: 66
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sorry for thew double post but here are some pics of my steering problem and my new body paint    |
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06-14-2011, 07:35 PM
| #11 |
| I wanna be Dave Join Date: Nov 2010 Location: 07456 N. NJ USofA
Posts: 8,314
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I would put some small flat washers between the servo ears and the mounting screws, this will help prevent breaking the servo case.
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06-14-2011, 07:49 PM
| #12 |
| Rock Stacker Join Date: May 2011 Location: Rancho Santa Margarita
Posts: 95
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Mine just barely rubs. Not enough to even bother with. I just turned down the EPA a bit. |
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06-14-2011, 09:30 PM
| #13 |
| Quarry Creeper Join Date: Jul 2008 Location: Sedro Woolley
Posts: 440
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tone down your epa's a lil and you'll be golden!!
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06-16-2011, 08:23 PM
| #14 |
| Rock Stacker Join Date: Sep 2010 Location: olathe
Posts: 66
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i ended up turning the epa down but now i don't have as much steering to the right but it doesn't really matter because i don't compete also the servo ears look chewed up because i had to oval them a bit to get the screws to go through and i never cleaned it up
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06-18-2011, 04:20 PM
| #15 |
| Newbie Join Date: Apr 2009 Location: New Brunswick
Posts: 34
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I am running into the same issue with the steering, may have to make a servo mount that is more in the center of the axle. Nice paint job .
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