Over heating gears

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jackobyte

jackobyte

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Hi all, its my first time on LSF so be gentle with me.

My problem is i've got a FG Hummer and my plastic 48t main spur gear (attatched to a alloy gear carrier) is being melted by the 16t steel pinoin gear :oops:, why.

i've changed all the bearings but its still getting warm after a few mins, the clutch bell seem to be spinning freely.

i've tried to locate a steel gear on the net but all the sites seem to be sold out of the 48t, does anyone know where i can purchase 1 as i don't want to keep buying plastic 1's every 5 mins.

cheers :sleep:
 
Hi and welcome to LSF..

Update your location so it easy for us to help you with finding a gear....

Have you looked at the lay shaft , that it is not bent?
 
and it's not the upper arm flexing and hitting the gear? do you have the aluminum rear upper? they sit pretty close and any flex puts the arm into the gear
 
Welcome to LSF buddy
Are you sure its just not the way your driving it? One of my friends has just bought an FG hummer and he is new to the scene too! His driving has got to be seen to be belived and he fried a pinion aswell.Try slowing down a bit and not full throttle all the time as this is quiet expensive on the pocket,when you have a few months experience then go full tilt!
J.
 
It may be getting warm but it should not be melting the gear. I would think what is happening is what was mentioned above. The upper rear A arm rod is nicking your gear which is folding over the plastic teeth and when it finally fails the metal gear spins it out and it melts.
I can only recommend to swap over to an alloy carrier and alloy 48t gear. The other thing you can do is grind a slight flat spot on the A arm shaft to help give more clearance.
Take your rear tire off on the gear side, grip your rear A arm shaft and rear lower arm, now twist the set up toward your gear. That is what happens every time you WOT(Wide open throttle) it.:mad:

Several FGMT's have been noted to come with a 16T layshaft gear or were changed to. I wonder if that was not FG's/owners intention to allow more space between the spur and A arm shaft?
 
Thanks for the advice.

I've got a alloy gear carrier but try to find a steel 48t to fit it is near impossible, i've been offered an all steel 48 for £25 but unsure due to the transmission shock that may accur or is it ok to run with.

Voo2doo has it in bits at the mo so hopefully he can give me an insight into the prob, think i'll need to buy a new plastic 48 first and see if there's any difference (costly way to find out but it keeps me rolling for a while).

Voo2 knows his stuff but more heads are better than 1.

i'll keep you posted.
 
Not sure what your running for radio gear but it should be alright with FM and 2.4g systems
Click to expand...

just bought a new Ansmann W3 2.4ghz for £70, not the best i know but you've got to start somewhere, saying that though i'm well pleased with it, does all the adjustments you need and doesn't feel too flemsy either.

I've not seen a gear melt before when using the alloy gear carrier
Click to expand...


The heats not comin from the alloy carrier its from the 16t gear, when stationary after a few blasts around the park the pinion gear was red hot and not knowing to me had melted part of the spur gear then later when i was about to go again it must of slipped on the smoothe part and sheared the gearing flat all the way around.
 
I can see where Super is coming from, a cooking clutch bell would cause this problem (bad engagement/binding clutch pads/incorrect gearing), otherwise there must be something binding to generate so much heat. I'm using plastic gears with steel pinions and never had this problem and my truck gets major abuse :D
 
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