R/C Tech Forums

Go Back   R/C Tech Forums > General Forums > Electric On-Road

Reply
 
Thread Tools Search this Thread
Old 12-26-2006, 11:31 PM   #2746
Tech Adept
 
minimanintaiwan's Avatar
 
Join Date: Jul 2006
Posts: 160
Default

Quote:
Originally Posted by H I
What cause gearbox teeth to chip off on mini? Iíve replaced them heaps of times in last few races, Iím talking once every 2-4 meeting. Wasnít like this before. Iíve checked pinion and diff but no damage at all. Just middle gears and I canít see any rock or any thing like that inside. Iíve tried Ėlube gears Ė no lube Ėsilicon splay all same result. I use gear diff build as per instruction with AW grease inside (not tight at all)
1 - Check universals, make sure grub screw is tight and pin holding shaft to axle is flush. Sometimes it works its way loose and your assembly gets loose but is still in tact. This can cause sudden but subtle stops when in motion and making turns. These abrupt stops can put pressure on all the gears.

2 - Check motor is mounted properly and pinion is tight.

3 - Check screws holding chassis together. They may be in but loose and not holding chassis tightly together

4 -check all bearings.
minimanintaiwan is offline   Reply With Quote
Old 12-27-2006, 02:07 AM   #2747
H I
Tech Master
 
H I's Avatar
 
Join Date: May 2006
Location: Sydney,Australia
Posts: 1,877
Trader Rating: 18 (100%+)
Default

Quote:
Originally Posted by Z-Mann
a crash is all it takes, so dont crash
Can't help running into your car. Your mini is like magnet

Thanks minimanintaiwan. I think you may be spot on about universals. That pin use to come loose all the time. I've been using thred lock on grub screw but pin still comes loose. Any tip on that?
H I is offline   Reply With Quote
Old 12-27-2006, 02:46 AM   #2748
Tech Adept
 
minimanintaiwan's Avatar
 
Join Date: Jul 2006
Posts: 160
Default

Quote:
Originally Posted by H I
I think you may be spot on about universals. That pin use to come loose all the time. I've been using thred lock on grub screw but pin still comes loose. Any tip on that?
I use threadlock too, but it does come loose. It's always the same one as well. Maybe a manufacturing thing. I just check it b4 and after each run now. Just turn tires all the way left or right and rotate tires and look for the pin and see if its flush or out on one side. Pain in the ass but better than replacing gears all the time.
minimanintaiwan is offline   Reply With Quote
Old 12-27-2006, 03:44 AM   #2749
Tech Fanatic
 
Z-Mann's Avatar
 
Join Date: May 2005
Location: Sydney Australia
Posts: 998
Default

[QUOTE=H I]Can't help running into your car. Your mini is like magnet

the reason you run into my car is cause you run on inserts
Z-Mann is offline   Reply With Quote
Old 12-27-2006, 05:23 AM   #2750
Tech Elite
 
rccardr's Avatar
 
Join Date: Aug 2003
Location: The Secret Underground Laboratory
Posts: 2,353
Trader Rating: 8 (100%+)
Default

Quote:
What cause gearbox teeth to chip off on mini? Iíve replaced them heaps of times in last few races, Iím talking once every 2-4 meeting. Wasnít like this before.
Crappy plastic now used in the gears. This is something we noticed about two years ago and it hasn't improved. I just buy a half dozen or so at the beginning of each season and replace them before every TCS regional.
__________________
I've never lost.
I've just been a little bit behind when time ran out...

RED DOT MOTORS- Fastest Titan 12T and silver can 540 motors in the known galaxy!
rccardr is offline   Reply With Quote
Old 12-27-2006, 06:07 AM   #2751
Tech Master
 
foampervert's Avatar
 
Join Date: Nov 2002
Posts: 1,354
Trader Rating: 5 (100%+)
Send a message via MSN to foampervert
Default gear snapping

Quote:
Originally Posted by H I
What cause gearbox teeth to chip off on mini? Iíve replaced them heaps of times in last few races, Iím talking once every 2-4 meeting. Wasnít like this before. Iíve checked pinion and diff but no damage at all. Just middle gears and I canít see any rock or any thing like that inside. Iíve tried Ėlube gears Ė no lube Ėsilicon splay all same result. I use gear diff build as per instruction with AW grease inside (not tight at all)

hiya HI!

do you use the regular gear shaft, the hollow metal shaft or carbon shaft for the centre gear?

the reason i ask is that if it's breaking, it could be because the gear shaft is slightly bent or it flexes during hard acceleration, thus causing more pressure on the gear teeth surface and chipping them. roll your gear shaft on a flat surface ( glass tabletop? ) and make sure it isn't bent.

i've been using the hollow metal shaft from the bearing pack. and so far, no gear chips at all.

it'll also help that you use a ball diff instead of a gear diff. a ball diff will allow some slip when your car impacts something. a gear diff has no give at all if both wheels are planted to the ground.

you might also like to check your gearbox halves ( chassis halves ), make sure the holes where the shafts fit into are not elongated due to wear and tear.

i dunt really think lube is gonna help all that much. most racers just skip lubing the gears so that the gears turn more freely. but just in case you really do wanna lube up your gears, use the lightest grease there is, dunt use thick, viscous grease on gears, it causes more pressure and wear.

-alexander
__________________
During heats, i use durex for both front and rear, with Hard inserts.

Sorex, i meant Sorex.
foampervert is offline   Reply With Quote
Old 12-27-2006, 08:23 AM   #2752
Tech Elite
 
Customworksking's Avatar
 
Join Date: Oct 2004
Location: Springfield ILLINOIS
Posts: 3,535
Trader Rating: 69 (99%+)
Cool car gear

I wonder R U running a stock 540 motor"silver can" ? I run a gear diff shimed till its locked like a spool or just loose enough to get me throu TCS tech been this way for 3 years now with no chips but I only run silver can motors....
__________________
Team Xray | RC America| Hudy |Jaco |AKA
Customworksking is online now   Reply With Quote
Old 12-27-2006, 10:29 AM   #2753
Tech Master
 
tamiyarcracer's Avatar
 
Join Date: Jan 2003
Location: Auburn, WA
Posts: 1,634
Send a message via Yahoo to tamiyarcracer
Default

Quote:
Originally Posted by H I
What cause gearbox teeth to chip off on mini? Iíve replaced them heaps of times in last few races, Iím talking once every 2-4 meeting. Wasnít like this before. Iíve checked pinion and diff but no damage at all. Just middle gears and I canít see any rock or any thing like that inside. Iíve tried Ėlube gears Ė no lube Ėsilicon splay all same result. I use gear diff build as per instruction with AW grease inside (not tight at all)
I found when running the gear diff, I chipped my gears, it is from being on power when the car gets in the air, then hits the track again with all the traction of the tires, something has got to give. Try a Ball diff, most of the time it will slip a little before the teeth chip.
tamiyarcracer is offline   Reply With Quote
Old 12-27-2006, 01:21 PM   #2754
Tech Fanatic
 
Z-Mann's Avatar
 
Join Date: May 2005
Location: Sydney Australia
Posts: 998
Default

we run tamyia rs540 which latley can be advanced, so wit the extra punch from the newer batts the gears would suffer more.i guess u have to be easier on the throttle.i found its more due to a sudden on power impact or running a crazy motor....yeah your right the plastic is crap.i usually boil em for 15min or sometimes coat them with a thin epoxy resin which seems to work, though after time they do need replacing.......... not a huge expense, still mini racing is cheap and much fun
Z-Mann is offline   Reply With Quote
Old 12-27-2006, 01:24 PM   #2755
Tech Master
 
tamiyarcracer's Avatar
 
Join Date: Jan 2003
Location: Auburn, WA
Posts: 1,634
Send a message via Yahoo to tamiyarcracer
Default

Quote:
Originally Posted by Z-Mann
we run tamyia rs540 which latley can be advanced, so wit the extra punch from the newer batts the gears would suffer more.i guess u have to be easier on the throttle.i found its more due to a sudden on power impact or running a crazy motor....yeah your right the plastic is crap.i usually boil em for 15min or sometimes coat them with a thin epoxy resin which seems to work, though after time they do need replacing.......... not a huge expense, still mini racing is cheap and much fun
Again try a ball diff. I never chip gears with a ball diff even with 23t motors
tamiyarcracer is offline   Reply With Quote
Old 12-27-2006, 01:28 PM   #2756
Tech Fanatic
 
Z-Mann's Avatar
 
Join Date: May 2005
Location: Sydney Australia
Posts: 998
Default

i found ball diffs wear out the drive cups to easily plus they cost a lot more and are inconsistant
Z-Mann is offline   Reply With Quote
Old 12-27-2006, 02:43 PM   #2757
H I
Tech Master
 
H I's Avatar
 
Join Date: May 2006
Location: Sydney,Australia
Posts: 1,877
Trader Rating: 18 (100%+)
Default

foampervert , I use carbon shaft. I thought carbon don't bend
I think I'm going back to dog bone and ball diff. If that don't fix problem I just have to buy another mini
H I is offline   Reply With Quote
Old 12-27-2006, 05:32 PM   #2758
Tech Apprentice
 
Join Date: Sep 2003
Location: San Francisco
Posts: 91
Default mo3 body

tony

i just found some hpi mini 225 mercedes a-class bodies. I was wondering if the'll fit the mo3 and if they'll clear the servo?

thanks
rai
rai13 is offline   Reply With Quote
Old 12-27-2006, 06:58 PM   #2759
Tech Addict
 
GreaseMonkey's Avatar
 
Join Date: Apr 2006
Location: Ottawa, Canada
Posts: 552
Trader Rating: 4 (100%+)
Default

Is there any way you can get an M04 chassis down to a short wheel base? My main issue is that there's very few RWD bodies available in the 225mm wheel base so if I can shorten it. I won't have to worry so much about getting new bodies when the time comes.
__________________
I'm not a grown man playing with toys. I'm a hobbyist.
GreaseMonkey is offline   Reply With Quote
Old 12-28-2006, 01:33 AM   #2760
Tech Elite
 
tony gray's Avatar
R/C Tech Elite Subscriber
 
Join Date: Jun 2002
Location: Melbourne, Australia. Home of rc-mini.net
Posts: 3,210
Trader Rating: 4 (100%+)
Default

The HPI Merc A Class will fit an M03 easily Rai, I didnt list it in our site because it hasnt been available for years..

SWB M04? I dont think so. Not that I've ever seen. At 210mm it'd be even more of a handful!
There used to be a Kai carbon conversion for the M04 but I think that was 225 as well. I think you'd actually have to make one.
Something similar to the HPI M02 conversion that we have on the website would work.
tony gray is offline   Reply With Quote
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Tamiya Mini Cooper M-03L Hop-ups mini71 R/C Items: Wanted to Buy 4 05-04-2016 11:07 AM
Tamiya Mini Cooper mach51 R/C Items: Wanted to Buy 10 09-02-2011 12:08 AM
FS:TAMIYA Mini Cooper, TA 04S rthmotorsports R/C Items: For Sale/Trade 4 10-20-2007 09:37 PM
Tamiya 415 MSX and M03 Mini Cooper F/S Racer X79 R/C Items: For Sale/Trade 14 12-22-2006 07:38 AM
Tamiya M01,02,03, or 04 Mini Cooper ccugolf.com R/C Items: Wanted to Buy 2 12-05-2004 08:55 PM


Tags
m03, m03r ules, m05, mini, tamiya


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 01:39 PM.


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

SEO by vBSEO 3.5.0