RC India

RC Models => Cars => Topic started by: saurabh724 on March 14, 2012, 02:53:26 PM

Title: have a gap between pinion and spur gear. (RESOLVED)
Post by: saurabh724 on March 14, 2012, 02:53:26 PM
Hi,
I was doing my usual drift session, it had a little bump with the wall and the wheels stopped spinning, only the motor does now.
I have had much harder bumps earlier and never had this problem.

here's the video

http://www.youtube.com/watch?v=w3vUdsfLMZA

It is fixed, and not adjustable unlike some other cars, so i have no idea how to fix it, since nothing can be moved out of its place.

Any ideas?
Title: Re: have a gap between pinion and spur gear.
Post by: sushil_anand on March 14, 2012, 03:17:18 PM
Have you checked if you have any broken teeth on the gear/s?
Title: Re: have a gap between pinion and spur gear.
Post by: iamahuman on March 14, 2012, 03:31:12 PM
Well, it's pretty much impossible to have a car with no settings for gear mesh. Chances are, one of the screws holding the motor mount moved out and the whole setup is out of alignment. The worst case scenario is that the chassis is tweaked so much, that the gear mesh has gone off but I really don't think that is the issue here. There has to be some way to adjust the gear mesh on the TT01.

EDIT: A quick google search later, I'm amazed. It does have no particular gear mesh adjustment. There is one way TT01 guys seem to adjust their mesh.

It's pretty clear in reply #4 here (http://melbrc.org/vB/showthread.php?t=2489) and reply #2 here (http://www.tamiyaclub.com/forum/index.php?showtopic=5619). Hope that fixes your problem.
Title: Re: have a gap between pinion and spur gear.
Post by: saurabh724 on March 14, 2012, 03:40:32 PM
Quote from: iamahuman on March 14, 2012, 03:31:12 PM
Chances are, one of the screws holding the motor mount moved out and the whole setup is out of alignment.

You are absolutely right, that is exactly what happened, you sir, are an expert :)
Title: Re: have a gap between pinion and spur gear. (RESOLVED)
Post by: iamahuman on March 14, 2012, 03:59:35 PM
Glad to know I could help. :)
Title: Re: have a gap between pinion and spur gear. (RESOLVED)
Post by: mail4ajo on March 14, 2012, 06:05:01 PM
This is common. Did you blue-thread lock the motor screws? If not, please do. You will save your spur gear
Title: Re: have a gap between pinion and spur gear. (RESOLVED)
Post by: iamahuman on March 14, 2012, 06:10:45 PM
A small addition to Ajo's post above. ONLY use threadlock if the motor mount is made of aluminium. Threadlock is quite corrosive and will kill plastic. If the screw is going into plastic, just put some CA glue on the last two threads of the screw. Your motor mount does look like metal but I though I'd let you know...
Title: Re: have a gap between pinion and spur gear. (RESOLVED)
Post by: saurabh724 on March 14, 2012, 06:17:42 PM
i have plastic motor mount, actually if you notice in the video itself, you can see the screw, soaked in grease :), should have noticed it myself in the first place.
Title: Re: have a gap between pinion and spur gear. (RESOLVED)
Post by: iamahuman on March 14, 2012, 08:00:43 PM
Well then, you just got saved ;)

I might need new glasses :P
Title: Re: have a gap between pinion and spur gear. (RESOLVED)
Post by: saurabh724 on March 14, 2012, 10:04:03 PM
well i should have checked it under light, it was only visible in camera flash :)
Title: Re: have a gap between pinion and spur gear. (RESOLVED)
Post by: iamahuman on March 14, 2012, 10:42:24 PM
Either way, now you know NOT to loctite a screw going into plastic without learning the hard way.