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Model Forum / Radio Controlled / Land Models / May 2004TMaxx Spurr gear adjustments
O.K...I'm taking the lazy way out. I've looked at the Traxxas site and haven't found what I'm after yet, so I'll throw the question out here... Just had to replace the spur gear on my TMaxx and I'm having a devil of a time getting it adjusted right. Is there a trick to this I'm not thinking of? Seems like the only adjustment for gear mesh between the engine and the spur gear are the four engine mounting bolts. However, the slots those bolts go through in the belly pan (wrong term I know - I'll get back to the parts diagrams later) don't allow for a lot of fine adjustment. I either get the gear screaming because of a wrong angle or a wrong tooth mesh depth, but can't seem to hit the happy medium. I will keep hunting through the Traxxas site, but if someone's got a quick guide or the right URL, I'd appreciate it! best regards, to all, Bert  SignatureTo all who have served or are serving the cause of freedom, from whatever country, whether in peace or in war, at home or abroad, thank you. "Let's roll!" Todd Beamer, Flight 93, September 11, 2001. > O.K...I'm taking the lazy way out. I've looked at the Traxxas site and > haven't found what I'm after yet, so I'll throw the question out here... [quoted text clipped - 15 lines] > best regards, to all, > Bert I have tried using a strip of notebook paper between the spur gear and the clutch bell. Press them together (firm but not too tight). Then tighten the engine mount screws to maintain the gap. Then pull the piece of paper out (it should look like an elongated paper fan). That should give you a good mesh. Make sure there is a small amount of play between the teeth. If it is too tight then try again and don't push the gears together as hard as last time. If too lose, then try again and push the gears together a little bit more firmly. HTH Robert Very cool idea Robert - thanks. Bert > I have tried using a strip of notebook paper between the spur gear and the > clutch bell. Press them together (firm but not too tight). Then tighten [quoted text clipped - 4 lines] > last time. If too lose, then try again and push the gears together a little > bit more firmly. SignatureTo all who have served or are serving the cause of freedom, from whatever country, whether in peace or in war, at home or abroad, thank you. "Let's roll!" Todd Beamer, Flight 93, September 11, 2001. > O.K...I'm taking the lazy way out. I've looked at the Traxxas site and > haven't found what I'm after yet, http://www.traxxas.com/support/howto/trx_tmaxx_spurgear_replace.htm > Seems like the only adjustment for gear mesh between the engine and the > spur gear are the four engine mounting bolts. There is a "paper" method. Loosen the engine mounting so you get wiggle room put a strip of paper between the clutchbell and spur move the engine over for a snug fit; tighten it down rotate the spur to back the paper out Voila! (or, as the mouthbreathers say, "Wollah!") SignatureL.V.X., brother mouse http://www.mousetrap.net/otr/ Old Time Radio trades http://makeashorterlink.com/?K16312E06 CBS Radio Mystery Theater database http://greyhound.mousetrap.net/altus/ retired racing dog Ahh...the old stripped spur gear. I was tearing them up on my Savage 25...now I have them replaced with steel gears. Yeah, well I'd much rather replace the cheap spur gear for my Maxx than replace the expensive pinion gear, since all the metal spur gears are hardened more than the stock pinion gear. They don't strip anyways if you have the right mesh. Mine only stripped becaust the hardware holding the engine mount came loose and the engine shifted ruining the mesh. Anyways, it gave me an excuse to get a gear for more low-end... if only the (not so)Local HS would ever keep them in stock. I'm stuck with a 70 from the stock 72 when I would have prefered the 74. They never seem to have it in stock, so I guess I'll just grab one on eBay. > Ahh...the old stripped spur gear. I was tearing them up on my Savage 25...now I > have them replaced with steel gears. as far as the pinion gear, when you buy steel, you get both the spur and pinion...forgot to mention that...sorry > as far as the pinion gear, when you buy steel, you get both the spur and > pinion...forgot to mention that...sorry So when they come as a set, I presume they're of equal metallurgy (hardness, etc.)? Buying just the metal spur gear would be more problematic? Bert SignatureTo all who have served or are serving the cause of freedom, from whatever country, whether in peace or in war, at home or abroad, thank you. "Let's roll!" Todd Beamer, Flight 93, September 11, 2001. > Yeah, well I'd much rather replace the cheap spur gear for my Maxx than > replace the expensive pinion gear, since all the metal spur gears are > hardened more than the stock pinion gear. That's a valuable piece of info...guess I'll rethink future replacements. They don't strip anyways if you > have the right mesh. Mine only stripped becaust the hardware holding the > engine mount came loose and the engine shifted ruining the mesh. True enough - same thing happened to me. Thanks Andrew. Bert SignatureTo all who have served or are serving the cause of freedom, from whatever country, whether in peace or in war, at home or abroad, thank you. "Let's roll!" Todd Beamer, Flight 93, September 11, 2001. > Ahh...the old stripped spur gear. I was tearing them up on my Savage 25...now I > have them replaced with steel gears. Ohhhh...believe me, I was tempted to buy the steel instead of the plastic gear, but two things stopped me. First was this weeks play budget - four bucks was cool, forty - nope - scheduled to take the wife out shortly - must remain calm!! The second thing though was that I realized why the gear stripped to begin with. My fault - in a crash that bent things up enough to break one of the frame rails, I didn't notice that the engine had shifted slightly. The original gear had held up through nearly three gallons of fuel and obviously would have lasted a lot longer had I paid closer attention. Upshot - plastic for now, but saving up for steel soon! Bert SignatureTo all who have served or are serving the cause of freedom, from whatever country, whether in peace or in war, at home or abroad, thank you. "Let's roll!" Todd Beamer, Flight 93, September 11, 2001. Thanks for the url and the tips - worked like a charm! Bert > http://www.traxxas.com/support/howto/trx_tmaxx_spurgear_replace.htm > There is a "paper" method. > Loosen the engine mounting so you get wiggle room > put a strip of paper between the clutchbell and spur > move the engine over for a snug fit; tighten it down > rotate the spur to back the paper out > Voila! (or, as the mouthbreathers say, "Wollah!") SignatureTo all who have served or are serving the cause of freedom, from whatever country, whether in peace or in war, at home or abroad, thank you. "Let's roll!" Todd Beamer, Flight 93, September 11, 2001. |
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