RE: My 1st Belt Driven Tamiya - Durga DB-01  
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RE: My 1st Belt Driven Tamiya - Durga DB-01 - 3/23/2008 2:30:43 PM   
nauticar


 

Posts: 403
Joined: 9/23/2006
From: Walawalana, REUNION
Status: offline 		I've heard of stripped or melted GEARS....but this....

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Dark Impact, Durga and Eunos, all Mambafied and Lipoed!

(in reply to rymansl2)
       Post #: 176

RE: My 1st Belt Driven Tamiya - Durga DB-01 - 3/23/2008 4:27:43 PM   
gman1


 

Posts: 155
Joined: 2/2/2006
From: weymouth, MA, USA
Status: offline 		All i can say is WOW! Please explain how this happened, how to prevent it, and what the hell you were running in that thing?

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Tamiya Durga-Mamba Max 6900- Team Orion 3600 Carbon Edition Lipo- Futaba R152JE Receiver- HiTec HS-625MG Servo- TRF Dampers!

(in reply to nauticar)
       Post #: 177

RE: My 1st Belt Driven Tamiya - Durga DB-01 - 3/23/2008 5:01:10 PM   
nauticar


 

Posts: 403
Joined: 9/23/2006
From: Walawalana, REUNION
Status: offline
quote:

ORIGINAL: gman1

All i can say is WOW! Please explain how this happened, how to prevent it, and what the hell you were running in that thing?


i was about to ask the same question.....and my initial reaction wasnt 'WOW' it was '****!!!'

i was running my durga at the carpark, nothing unusual, when suddenly i heard kind of a high pitch squeal from the back diff when i throttle it. car doesnt push forward a lot...it moves, but a little.

my initial thoughts were either the spur gear teeth were stripped (hence the high pitch squeal), or the belt somehow came loose at the rear diff (hence the loss in power).

came home, dismantled the drivetrain, expecting an easy job. haha fat hope. found the rear diff in that state. the front is a one way, and its not affected. both pics are of the rear diff.

my diff plates are UNSCORED. good as new. so that rules out me tightening the diff too tight....and rules out normal wear and tear. last time i checked, turning one of the rear wheels will result in the other going the other way (hence it wasnt too loose either). ball diffs were greased very generously, and from the pictures, there's still leftover grease.

ball diffs were intact, none shattered.

im running a MM5700, Hyperion 16C 5350 Lipos.

im not sure exactly what happened, but i suspect me drifting and sliding a lot in the car park had something to do with it.

whadaya all think? lol.

even my trashed dark impact still has the diffs intact.

_____________________________

Dark Impact, Durga and Eunos, all Mambafied and Lipoed!

(in reply to gman1)
       Post #: 178

RE: My 1st Belt Driven Tamiya - Durga DB-01 - 3/24/2008 5:39:46 AM   
dragster5151


 

Posts: 10
Joined: 12/21/2007
From: singapore, SINGAPORE
Status: offline 		Hi nauticar, wow sorry to see what it happened, did you checked whether the diff plates are loose? ...the metal plates(#BG8) that we are to ca glue onto the black plastic diff plate holder (#A7) ?

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DB-01 Durga. CC-01 Touareg. TA-02 F150. M03 Cooper. TT-01 Coppermix Silvia.TT-01 Skyline. Hyper ST.

(in reply to nauticar)
       Post #: 179

RE: My 1st Belt Driven Tamiya - Durga DB-01 - 3/24/2008 6:22:44 AM   
nauticar


 

Posts: 403
Joined: 9/23/2006
From: Walawalana, REUNION
Status: offline
quote:

ORIGINAL: dragster5151

Hi nauticar, wow sorry to see what it happened, did you checked whether the diff plates are loose? ...the metal plates(#BG8) that we are to ca glue onto the black plastic diff plate holder (#A7) ?


heh dont be sorry - i hope nothing of this happens to any of you guys who own a ball diff car!

didnt think of checking the diff plates whether they were loose - checking them now - ok out of the two plates, one is already detached from the diff holder, while the other is intact.

it could be because of that, but im trying to visualise here - if the diff plate loosened up, i would have immediately lost differential power at one side. however the symptoms i experienced was that both sides had power loss.

also, i re-checked the diff pulley, and both sides were 'melted'.

my theory :The ball bearings wore down to the point that the diff plates were rubbing against the diff pulley. any other ideas, anyone?

im expecting Tamiya ceramic balls and a new diff pulley anytime now.... ill go measure the balls with my eye once i get my hands on them (sheesh that sounded weird)



_____________________________

Dark Impact, Durga and Eunos, all Mambafied and Lipoed!

(in reply to dragster5151)
       Post #: 180

RE: My 1st Belt Driven Tamiya - Durga DB-01 - 3/25/2008 2:36:16 AM   
wookie_racer



Posts: 1446
Joined: 2/23/2004
From: lansing, MI, USA
Status: offline 		that usually means that you diff was too loose. i did that in my MF2 like 3 times.

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(in reply to nauticar)
       Post #: 181

RE: My 1st Belt Driven Tamiya - Durga DB-01 - 3/25/2008 3:58:17 PM   
stringcheese


 

Posts: 79
Joined: 3/17/2008
From: Waterford, MI, USA
Status: offline 		Yep. Loose diff. My xxx-nt melted like 5 of them justy like yours. Losi redesigned it on the nt2. It just loosened itself. I put it back together last time with metal diff gear and red locktite. I've been scared to run it though. It's been like 2 years now sitting on the shelf.lol
If you have the feel then tighten it with red locktite. Diffs aren't that expensive but the fustration of having them come loose and melt sucks.

(in reply to wookie_racer)
       Post #: 182

RE: My 1st Belt Driven Tamiya - Durga DB-01 - 3/25/2008 4:22:11 PM   
Redvanmafia


 

Posts: 792
Joined: 3/6/2008
From: Frei street famila, ON, CANADA
Status: offline 		diffs in general are frustrating (ball diffs)

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(in reply to stringcheese)
       Post #: 183

RE: My 1st Belt Driven Tamiya - Durga DB-01 - 3/28/2008 6:19:40 PM   
nauticar


 

Posts: 403
Joined: 9/23/2006
From: Walawalana, REUNION
Status: offline 		sigh......so that's what happened......

thanks for your responses guys. guess i dont really need the ceramic ball bearings i bought lol

_____________________________

Dark Impact, Durga and Eunos, all Mambafied and Lipoed!

(in reply to Redvanmafia)
       Post #: 184

RE: My 1st Belt Driven Tamiya - Durga DB-01 - 3/29/2008 3:06:47 AM   
dragster5151


 

Posts: 10
Joined: 12/21/2007
From: singapore, SINGAPORE
Status: offline 		Is it ok to threadlock the the difffential screw in (black hex head screw) just to prevent it from coming loose?

_____________________________

DB-01 Durga. CC-01 Touareg. TA-02 F150. M03 Cooper. TT-01 Coppermix Silvia.TT-01 Skyline. Hyper ST.

(in reply to nauticar)
       Post #: 185

RE: My 1st Belt Driven Tamiya - Durga DB-01 - 3/29/2008 4:10:02 AM   
nauticar


 

Posts: 403
Joined: 9/23/2006
From: Walawalana, REUNION
Status: offline
quote:

ORIGINAL: dragster5151

Is it ok to threadlock the the difffential screw in (black hex head screw) just to prevent it from coming loose?


I cant recall offhand whether the 2mm nut has the nylon lock portion .... but in any case as you know the purpose of me threadlocking the screw is to prevent it from coming loose... and originally i DID tighten the diffs very tightly, but it still loosens itself.

The only downside is that it might be a bit more difficult for me to unscrew it if i see the need to dismantle the differentials lol!



_____________________________

Dark Impact, Durga and Eunos, all Mambafied and Lipoed!

(in reply to dragster5151)
       Post #: 186

RE: My 1st Belt Driven Tamiya - Durga DB-01 - 3/29/2008 8:56:03 AM   
dragster5151


 

Posts: 10
Joined: 12/21/2007
From: singapore, SINGAPORE
Status: offline 		Hi nauticar, Yes. the 2mm nut has nylon part in which the BG4 screw connects. me too also experiencing the same thing, tightening the diffs very tightly, then it still loosens itself.


_____________________________

DB-01 Durga. CC-01 Touareg. TA-02 F150. M03 Cooper. TT-01 Coppermix Silvia.TT-01 Skyline. Hyper ST.

(in reply to nauticar)
       Post #: 187

RE: My 1st Belt Driven Tamiya - Durga DB-01 - 3/29/2008 10:06:35 AM   
nauticar


 

Posts: 403
Joined: 9/23/2006
From: Walawalana, REUNION
Status: offline
quote:

ORIGINAL: dragster5151

Hi nauticar, Yes. the 2mm nut has nylon part in which the BG4 screw connects. me too also experiencing the same thing, tightening the diffs very tightly, then it still loosens itself.



are you using brushless?

_____________________________

Dark Impact, Durga and Eunos, all Mambafied and Lipoed!

(in reply to dragster5151)
       Post #: 188

RE: My 1st Belt Driven Tamiya - Durga DB-01 - 3/30/2008 5:04:08 AM   
dragster5151


 

Posts: 10
Joined: 12/21/2007
From: singapore, SINGAPORE
Status: offline
quote:

ORIGINAL: nauticar


quote:

ORIGINAL: dragster5151

Hi nauticar, Yes. the 2mm nut has nylon part in which the BG4 screw connects. me too also experiencing the same thing, tightening the diffs very tightly, then it still loosens itself.



are you using brushless?


Staying with brushed motors, using dirt tuned now..

_____________________________

DB-01 Durga. CC-01 Touareg. TA-02 F150. M03 Cooper. TT-01 Coppermix Silvia.TT-01 Skyline. Hyper ST.

(in reply to nauticar)
       Post #: 189