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Stripped pinion gear

Discussion in 'Chassis & Drivetrain' started by Greg2367, Jun 3, 2017.

  1. Steveoarrma517

    Steveoarrma517 Well-Known Member

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    I have had a rough start too, check my upgrading talion postings. Have completely done away with Arrma motor an ESC and things started working much better. Still wearing spur gear pretty well on 6s though.
     
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  2. Crash

    Crash Well-Known Member

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    Never stripped a pinion unless the grub came loose. Its all about the mesh!
     
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  3. Micstar

    Micstar Active Member

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    I may have agreed with you maybe the first two times but after 4 pinions and the last one is still stuck on the snapped shaft!!! User error is no longer an excuse. I am no expert but I have 3 other RCs and have not had this many issues with them?
     
  4. Crash

    Crash Well-Known Member

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    Sounds like a rock caught in that area some how or maybe it was a bad bearing in the motor,bad center diff bearing,check the 4 screws holding center diff together. If they are not tightened evenly it will wobble. Maybe take out center diff and mounts.check over everything and reinstall. Something is loose or theres interference. If mesh is correct.
     
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  5. Micstar

    Micstar Active Member

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    Yep will definitely be stripping it cause I just can't take all the blame on this one. Check out the carnage... Will be contacting Arrma as well I think.
     

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  6. Buzz430

    Buzz430 Well-Known Member

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    Well my Kraton is one week old and now stripped the pinion also. Till replacement can be ordered and installed I am going to use the 14T speed pinion gear that came with it. Now for my questions. What is the pitch on the pinion? What brand would you recommend? Here is the list from Tower Hobbies that I came up with. Any of these better than stock, or any to stay away from?
    http://www3.towerhobbies.com/cgi-bin/wti0095p?FVPROFIL=&FVSEARCH=%3Cb%3E12t%3C%2Fb%3E+pinions
     
  7. dpricenator

    dpricenator Supporting Member!
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  8. Stopfer

    Stopfer Well-Known Member

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  9. Voltron7

    Voltron7 Supporting Member!
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    Damn that's crazy. Maybe it's coincidence, but I've also basically stopped breaking pinions by using 4S. I also noticed my front and rear dog bones' pins/ends were getting noticeably worn after I'd run a few 6S. Probably a lot of the other stock parts don't like 6S, too :(
     
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  10. Boosted4Runner

    Boosted4Runner Well-Known Member

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    Well, add me to the list. Loved the Outcast and ran many times on 4S without an issue. Then ran 2 times with 6S and issues each time. Bent a front shock shaft the first time (can anyone confirm it's the AR330195 64MM?) and then just toasted the stock pinion (14T?).
    I ordered up a Kraton for my son to run because he couldn't keep up around our home-built track with his Summit. It arrives tomorrow. My daughter is running a HoBao Hyper Truggy and hasn't had an issue and it's taken some spills. We recently moved from 1/10 scale to 1/8 scale because of our property (lots of larger obstacles that 1/10 doesn't handle as well). Hopefully I don't end up working on these Arrmas every other run, because I don't have the time. Guess I'll fix the pinion and move back to 4S. Might have a handful of brand new 6S lipos to get rid of :-(
     
  11. Stopfer

    Stopfer Well-Known Member

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    I believe from the factory, the mesh may not be quite right as I run mine in 6s a lot now worn on my broken a arms which is my fault. I had 3 broken spurs till I got the mesh right and now I pound on my Typhon with a tooth on 4 and 6s. Arrmareaper can vouch for his talion handling 6s with a 13 tooth pinion because all he runs is 6s
     
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  12. Boosted4Runner

    Boosted4Runner Well-Known Member

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    Thank you Stopfer. I believe you linked to the ARP pinions on Amazon so I ordered the set of 3 (12, 13, and 14) and then a 13T Tekno as well. I watered our track down earlier but we still have a fair amount of debris/pebbles that could have been the culprit. I frequently shake the truck out during stops. Our HaBao has an even more open chassis design than the Outcast and it has not had an issue yet though. Which leads me to believe your theory on factory mesh being incorrect could have been the issue. I honestly didn't check the factory mesh because, well, I didn't think I had to. Lol lesson learned.
    I have one of the mesh Toyz chassis covers, I'll try that out as well.
     
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  13. Voltron7

    Voltron7 Supporting Member!
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    Good info guys and thanks for posting it for all...I suspect it was part of my problem, too. I'm going to try out my 6S again since I've set the mesh. P.S. I have moved back to the HR shroud because it has a zipper on each side instead of one in the middle...just easier for access ;)
     
  14. Stopfer

    Stopfer Well-Known Member

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  15. Steveoarrma517

    Steveoarrma517 Well-Known Member

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    How's things going ,I finally got my talion improved. Took motor an center diff out again,went back to 10.000 diff oil(3/4 full) tighten very slow an even,re-assemble top plate an mounts an set gear mesh with assembly in hand,then mounted into chassis.70% less noise compared to when I took it out of box stock.now I Know it's right.awesome for now.
     
  16. Micstar

    Micstar Active Member

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    IMG_20170814_165336_Bokeh.jpg
    Well after putting in a new motor (decided to try a new stock motor) and replacing the pinion with a Robinson Racing Hardened steel 14t pinion I have run it on 4S without any issues. I too set the mesh in hand and it is a bit quieter then it was out of the box but have yet to do anything with the diffs at this stage. I have also managed to do a couple of quick runs on 6s but fear got the better of me so only 1.5 runs on 6s at this stage. So far so good I am hoping that it may have been the motor that was the issue in the first place ie. warped shaft or something cause I have have done more runs now without issues than I did originally??? I have been doing some mods so haven't done to many runs yet to know for sure. New springs, replaced shock oil, RPM arms, 23kg Power HD servo, SRC tyres, Robinson Racing 14t pinion, new body and am waiting on new Hot Racing Alum Axle Carriers and the Hot Racing servo mount.... Will let you know how all that goes once I have it all in.
     

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  17. Voltron7

    Voltron7 Supporting Member!
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    Looks great
     
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  18. Stopfer

    Stopfer Well-Known Member

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    I totally understand your fears, I had the same problem and fears. They are all gone now as I have pounded and abused my typhon on 6s with a 15 tooth pinion.
    don't give up on 6s, they can take. I had the same problem on a Typhon but after 3 pinions(2 arrma one hpi) and a spur gear, it rips it up on 6s and a 15 tooth advantage racing products pinion. I really believe the mesh has to be just right or destruction and frustration will happen. I did notice that the rear center dogbone is getting pretty worn. I can not says that it is premature as I have run 40 or so 6s packs through it aggressively :)
     
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  19. slick2500

    slick2500 Well-Known Member

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    First 6s pack through my Outcast I lost one tooth on my 12t pinion. Second 6s pack lost all but one tooth from the 16t pinion.
    Motor mount is all jacked up from trying to remove the 12t pinion.
    G40Bvc0h.jpg
     
  20. Stopfer

    Stopfer Well-Known Member

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    Heat it up, arrma loves red loctite. I believe they can handle 6s just not the arrma pinions. I bought some advantage racing pinions and have not broken any and usually only run 6s
     
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