Spur keeps stripping (maxx v2)

[Gresvk]

Hey folks,

3rd spur stripped already for my traxxas maxx v2.

1st one was gone after a hard landing but not immediately, after I drove it for a little.

I changed it (50t again) and new bearings, after 10-15 min the 2nd on was gone.

Today I changed it once again 50t but also changed the pinion to 22t and moved the pin from D to C and it was gone in 20 seconds.

What the heck am I doing wrong ???

Everything is stock on it.

 

[tntpoof]

mesh

 

[Gresvk]

How is that possible if I use the pin system ?

Any proposal how to fix it?

 

[WickedFog]

Is dirt getting in the gears? If not, check the mesh. Pin system or not, your mesh needs to be right. If not, you need to figure out a way to make an adjustment. Even if it means breaking out the dremel.

 

[Gresvk]

Well the dremmel is out and loctite hy 4070
Hopefully this would ensure the mesh settings.

I would try again the pin settings and check the mesh to see if further dremmeling is needed.

Good thing that I ordered 3 spur gears

 

[Gresvk]

The glued nut and a longer screw with a grover and washer, keeps the mesh in order

 

[Partydaz]

Spot on idea that is . I have noticed that if that little screw comes even a bit loose our the hole is worn and the thread doesn't catch spur gears be stripping . I just ordered a new gear mesh cover fixed it for me. Plus I gave all the motor mount bolts and surrounding bolts on the chassis a good tighten a few did come loose and I cleaned all the crap under the motor mount aswell.

I worn the thread on my gear mesh cover by trying ram the screw in because the fan was in the way. Lesson learned : take off the fan lol.

 

[olds97_lss]

I used a 4 prong T-nut from the back side. I had to shorten the threaded part a bit as it stuck out beyond the outside of the housing about 1mm, so I couldn't tighten it properly. Seems to have helped my issue at the time. Once I got the nut fit/ground down, I put some shoe goo on it to keep it from falling out when I take the cover off.

I wasn't using the pin because I couldn't get good mesh with my 4074 in the stock motor sled. I've since gotten the "big block" motor sled and put a 4092/1650kv in it. Seems I can use the pin now with 24/46 gearing. I have a steel spur now though, got tired of fighting with it. I haven't run it since I put the big block sled in it. I also put down a bead of shoe goo in the sled before installing the motor to limit how much it flexes as I found my motor plate was pretty tweaked.