R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Nitro Off-Road

Reply
 
Thread Tools Search this Thread
Old 05-21-2009, 06:09 PM   #16
Tech Master
 
GMS_Racing's Avatar
 
Join Date: Jul 2008
Location: Palm Harbor
Posts: 1,700
Trader Rating: 65 (100%+)
Default

Sounds like something in the mesh..like a bent tooth or a bur on either the spur or pinion
__________________
Matt Reinders
8ight E 3.0
Elite Performance
GMS_Racing is offline   Reply With Quote
Old 05-21-2009, 06:19 PM   #17
Tech Master
 
Brushlessboy16's Avatar
 
Join Date: Jul 2008
Location: Westampton, New Jersey
Posts: 1,242
Trader Rating: 18 (100%+)
Send a message via AIM to Brushlessboy16 Send a message via Yahoo to Brushlessboy16
Default

Quote:
Originally Posted by GMS_Racing View Post
Sounds like something in the mesh..like a bent tooth or a bur on either the spur or pinion
Thats definitely what it sounds like. I think the bearings in the front pinion might be going.

Ill check that in the morning. just hope I can get this sorted out by the weekend
__________________
Ben White aka The Flyin' Flashlight
Rc-monster Team Driver
JQ The Car, Neu 1515 1.5D, Mamba Monster, Rc-monster slipperential, Futaba Bls351
Unconventional Techniques, Superior Results.
Brushlessboy16 is offline   Reply With Quote
Old 05-21-2009, 06:24 PM   #18
Tech Initiate
 
Focusprinting's Avatar
 
Join Date: May 2009
Location: Jonesboro, GA
Posts: 34
Default

The reason that a bad bearing my only make noise while accelerating or braking is because those are the times when the drivetrain is under the most stress. As torque goes up during those times, a bad bearing will "distort" (I couldn't figure out a better word to describe it) and change the mesh in that area which will cause the grinding and ticking. Then when you are coasting (or going slow) there is less torque so the bearing is not being "distorted" and the mesh goes back to normal and the noises are gone.

The best way to check you bearings is to remove them one at a time and check the play between the inner sleeve (the part that spins) and the outer sleeve. If there is alot of play then it is toast. Also, spin the bearing and if it sounds or feels gritty then it is probably bad as well.
__________________
www.focusprinting.com
Focusprinting is offline   Reply With Quote
Old 05-21-2009, 07:42 PM   #19
Tech Lord
 
Jaz240's Avatar
R/C Tech Elite Subscriber
 
Join Date: Aug 2008
Location: Dwindle city
Posts: 12,492
Trader Rating: 52 (100%+)
Default

Quote:
Originally Posted by Focusprinting View Post
The reason that a bad bearing my only make noise while accelerating or braking is because those are the times when the drivetrain is under the most stress. As torque goes up during those times, a bad bearing will "distort" (I couldn't figure out a better word to describe it) and change the mesh in that area which will cause the grinding and ticking. Then when you are coasting (or going slow) there is less torque so the bearing is not being "distorted" and the mesh goes back to normal and the noises are gone.

The best way to check you bearings is to remove them one at a time and check the play between the inner sleeve (the part that spins) and the outer sleeve. If there is alot of play then it is toast. Also, spin the bearing and if it sounds or feels gritty then it is probably bad as well.
+1 well said, and to the point
__________________
nothing to see here................................
Jaz240 is offline   Reply With Quote
Old 05-21-2009, 10:56 PM   #20
Tech Elite
 
HaulinBass's Avatar
 
Join Date: Dec 2004
Location: valleyview alberta canada
Posts: 2,114
Trader Rating: 8 (100%+)
Default

Sounds to me like something is slipping somewhere in the drivetrain.Seriously as someone posted run the snot out of it for a pack to see if something loosens up or breaks. Worst case you finish off something thats allready broken
HaulinBass is offline   Reply With Quote
Old 05-22-2009, 03:39 AM   #21
Tech Master
 
Brushlessboy16's Avatar
 
Join Date: Jul 2008
Location: Westampton, New Jersey
Posts: 1,242
Trader Rating: 18 (100%+)
Send a message via AIM to Brushlessboy16 Send a message via Yahoo to Brushlessboy16
Default

Quote:
Originally Posted by Focusprinting View Post
The reason that a bad bearing my only make noise while accelerating or braking is because those are the times when the drivetrain is under the most stress. As torque goes up during those times, a bad bearing will "distort" (I couldn't figure out a better word to describe it) and change the mesh in that area which will cause the grinding and ticking. Then when you are coasting (or going slow) there is less torque so the bearing is not being "distorted" and the mesh goes back to normal and the noises are gone.

The best way to check you bearings is to remove them one at a time and check the play between the inner sleeve (the part that spins) and the outer sleeve. If there is alot of play then it is toast. Also, spin the bearing and if it sounds or feels gritty then it is probably bad as well.
Will Do
Quote:
Originally Posted by Jaz240 View Post
+1 well said, and to the point
Quote:
Originally Posted by HaulinBass View Post
Sounds to me like something is slipping somewhere in the drivetrain.Seriously as someone posted run the snot out of it for a pack to see if something loosens up or breaks. Worst case you finish off something thats allready broken
I tried that. nothing changed
__________________
Ben White aka The Flyin' Flashlight
Rc-monster Team Driver
JQ The Car, Neu 1515 1.5D, Mamba Monster, Rc-monster slipperential, Futaba Bls351
Unconventional Techniques, Superior Results.
Brushlessboy16 is offline   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -7. It is currently 03:34 AM.


Powered By: vBulletin v3.9.2.1
Privacy Policy | Terms of Use | Advertise Content © 2001-2011 RCTech.net