Results 1 to 10 of 10
  1. #1
    RC Competitor
    Join Date
    Nov 2009
    Location
    Durham Region, ON
    Posts
    86

    Burning out my spur gear - ***???

    - 2 tanks of gas and I've lost 2 spur gears.

    - Just bashing around and the centre of the gear is just going out on me.

    - Any ideas??

  2. #2
    RC Qualifier
    Join Date
    Jun 2006
    Location
    Wall, NJ
    Posts
    421
    i did this sooo many times when i first got my truck. Dont just replace the spur gear you need a new nut to hold it on. Once you melt the spur a few times the heat melts the nylon in the nut that holds it tight so the nut comes loose during driving causing the spur gear to melt again. Replace the nut and spur and you should fix the problem
    Revo 3.3, Nitro and E Rusty, T-Maxx project

  3. #3
    RC Competitor
    Join Date
    Nov 2009
    Location
    Durham Region, ON
    Posts
    86
    - Ok, but how the heck does it happen and how can I avoid it?

  4. #4
    RC Qualifier
    Join Date
    Jun 2006
    Location
    Wall, NJ
    Posts
    421
    it happens when the spur gear nut is too loose...the slipper slips too much creating excess friction causing the plastic to melt...if it happens a few time the nylon in the nut melts too and it will never stay tight. Avoid it by making sure you have it set at the correct tightness with a new nut.
    Revo 3.3, Nitro and E Rusty, T-Maxx project

  5. #5
    RC Racer
    Join Date
    Nov 2009
    Location
    Busselton, Australia
    Posts
    227
    also how are the slipper pegs. Mine only had 6 (one in every second hole) stock. I now use 12 (every hole filled).

  6. #6
    RC Competitor
    Join Date
    Nov 2009
    Location
    Durham Region, ON
    Posts
    86
    - There was only 6. like yours!
    - What purpose do they serve?

    - Any idea on the correct tightness?

  7. #7
    RC Qualifier
    Join Date
    Jun 2006
    Location
    Wall, NJ
    Posts
    421
    check your manual but i think it should b between half and 1 turn loose. the slipper pegs create more friction between the clutch and the spur gear. More pegs reduces the slip
    Revo 3.3, Nitro and E Rusty, T-Maxx project

  8. #8
    RC Turnbuckle Jr. KyLeader7's Avatar
    Join Date
    Jul 2007
    Posts
    5,078
    Quote Originally Posted by thingsbreak2ez
    it happens when the spur gear nut is too loose...the slipper slips too much creating excess friction causing the plastic to melt...if it happens a few time the nylon in the nut melts too and it will never stay tight. Avoid it by making sure you have it set at the correct tightness with a new nut.
    If the nut came loose wouldn't the spur just fall off? When me and my dad first got into this hobby we kept replacing them session after session until we figured out about gear mesh. Loosen up your engine mounts, and slide a peice of paper inbetween the spur and CB and then push the engine back and 'mesh' the gear teeth and tighten the engien mount + remove paper. Most everyone uses this concept on their rides. I use it on my 2 Nitro rustlers, Jato, and Revo. Loosen the nylon nut a whole turn and work from there. I forget the exact turns on the Rustlers, but The jato is 1 3/4 If I remember correctly. You can hold the spur and try to push the truck on the ground and feel from there.
    Learn by doing

  9. #9
    RC Qualifier
    Join Date
    Jun 2006
    Location
    Wall, NJ
    Posts
    421
    gear mesh can cause the problem too...and i said loose as in slightly...if its barely on there then yes it will fall off
    Revo 3.3, Nitro and E Rusty, T-Maxx project

  10. #10
    RC Champion grandtheft's Avatar
    Join Date
    Jul 2006
    Location
    Tacoma, WA
    Posts
    1,348
    I would buy the steel diff balls. Those friction peg things are worthless.

    http://www3.towerhobbies.com/cgi-bin...?&I=LX2760&P=7

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •