Motor overheating/ diff heat

[LCC4TWENTY]

After about 10-15 min. My motor gets fairly hot :-(. Im running a 15t pinion gear, ALONG WITH A TRINITY MONSTER MAXX MOTOR (23 turn i think) AND 6 CELL 3000Mah batt. pack What can i do to get motor temps down?

Im running a high temp wheel bearing grease in my diffs, but they are still getting warm. Any suggestions?

[JasonJones]

Do some reading in this section, tons of info on how to bring down the temps etc...

You mention a 15t pinion, but not the motor/battery combo...

And if grouser reads this thread, we'll get to see the infamous Losi Fan on the motor pic for sure...

[K_B]

Check your diff gears. Make sure the teeth on the spool are cut at an angle. If not, that's most likely the culprit.

[grouser]

Originally Posted by JasonJones

Do some reading in this section, tons of info on how to bring down the temps etc...

You mention a 15t pinion, but not the motor/battery combo...

And if grouser reads this thread, we'll get to see the infamous Losi Fan on the motor pic for sure...

Well I'm not one to disapoint!!!!!!!,,,,hea-tis,,,
and here's one for the front
and back to the rear for the diff,,,

[Ralphy]

I too suggest checking the worm gears to see if they are cut right, and a motor fan DOES help. Only question I have is how does it run with that motor? How is the torque and wheelspeed? I have one of the 19Tpro versions I been thinking of throwing in, just curious to see how the 23t faired.

[1rcmonster]

I would drop a few teeth on the pinion. I have a Titan in mine, stock Emaxx motor, with a 12t pinion them motor barely gets warm. I am running a CC Sidewinder with an Xtreme 3s 1350 lipo....

[K_B]

I'm seeing alot of suggestions for workarounds rather than real solutions. Gearing down is only gonna allow the motor to more easily turn the gears. Your motor temp MIGHT come down, but your axle temp and ESC temp will still be running high I bet. And you'll end up sacrificing wheelspeed.

I'm running a Goat with a 12T pinion and still managed to get my motor to around 160, my ESC to about 130 and my rear axle to up around 100. And that's with the gears properly lubed and the ESC set to Profile 3 as suggested by Novak. I inspected my gears and they had the tell-tale oddball wear pattern that many others have pointed out.

If the axle is getting hot like mine, there's obviously some undue friction in there. Check those gears. If they're cut straight on the spool instead of at an angle, that's most likely your culprit. Replace 'em and I bet your motor temps, ESC temps and axle temps will all drop significantly. At least that's what I'm hoping for mine.

[grouser]

If the diff is at 100 degrees,,,,what is the ambient temp? 80-90,,,that's only 10 or 20 degrees increase,,,hot day,,,hot truck

[LCC4TWENTY]

Originally Posted by sikax10

I too suggest checking the worm gears to see if they are cut right, and a motor fan DOES help. Only question I have is how does it run with that motor? How is the torque and wheelspeed? I have one of the 19Tpro versions I been thinking of throwing in, just curious to see how the 23t faired.

i had the novak 55t motor in it and wasnt happy with the power it put out. besides the heat its a strong motor. i noticed a big difference in toruqe and wheelspeed between the two.

[2500hdon37s]

so why does a faster motor make more tourqe out of the losi?

[K_B]

Faster motor (fewer turns) doesn't make more torque. You need the faster motor to make up for the really low gear ratio. That low gear ratio allows you to use the lower turn motors and still get a decent amount of torque.

[M_Saint]

Originally Posted by grouser

If the diff is at 100 degrees,,,,what is the ambient temp? 80-90,,,that's only 10 or 20 degrees increase,,,hot day,,,hot truck

I wouldn't worry about the worms till they get up around 145 degrees.
High speed worm gears are gonna make a lil heat. It's the nature of the type of gear. I am trying to figure out how to seal the rear housing so I can run some gear lube in the housing instead of grease.

Also to much grease will also cause heat due to grease shear and the pump effect.

[2500hdon37s]

Originally Posted by K_B

Faster motor (fewer turns) doesn't make more torque. You need the faster motor to make up for the really low gear ratio. That low gear ratio allows you to use the lower turn motors and still get a decent amount of torque.

but still a 55t geared high should still make a decent amount of tourqe on 9.6v right? but mine doesnt at all im fine with the speed i tend to like a little slower rig but still it has no tourqe

[motorman1600]

Originally Posted by M_Saint

I wouldn't worry about the worms till they get up around 145 degrees.
High speed worm gears are gonna make a lil heat. It's the nature of the type of gear. I am trying to figure out how to seal the rear housing so I can run some gear lube in the housing instead of grease.

Also to much grease will also cause heat due to grease shear and the pump effect.

I have tried and failed at sealing the housing. It pumps out the input shaft. Let me know if you figure it out.

[losikid]

Originally Posted by 1rcmonster

I would drop a few teeth on the pinion. I have a Titan in mine, stock Emaxx motor, with a 12t pinion them motor barely gets warm. I am running a CC Sidewinder with an Xtreme 3s 1350 lipo....

how does the titan work, i just blew my 45t to smoke and i'm looking for a replacement, also is it a brushed motor

[K_B]

Originally Posted by 2500hdon37s

but still a 55t geared high should still make a decent amount of tourqe on 9.6v right? but mine doesnt at all im fine with the speed i tend to like a little slower rig but still it has no tourqe

You should have a plenty of torque on 9.6V. You might actually be geared too high. If your running something like an 18 tooth pinion, try going down to a 16 or so...