Tb-02 Problem, On Road Chassis Only?

[necronomicon]

Hi all

Just had a mates TB-02 break down (motor ceased), and when i took it all apart the spur gear housing was full of **** and grit. The motor had a stone chipping jamming it up. Anyway the pinion gear and spur gear are pretty messed up and worn. On fixing and reassembly I notice that although the spur gear casing has a ball bearing seal at the front (where the propshaft runs through), at the back of this casing the propshaft exits through an unsealed hole about a 1mm bigger all the way around than the propshaft, meaning the gear casing is unsealed, hence all the sand and grit inside and wear to internal pinion and spur gear. Can anyone help with this problem, or is this chassis indoor/ perfect clean road use only????

thanks in advance

Neil

[WillyChang]

just make your own rear gearbox seal with tape or sticky vinyl, just a few seconds work with scissors.

If buying new pinion & spur, choose a steel pinion rather than Tamiya's soft metal ones.

In that closed space, the soft metal will wear down & spray its shavings everywhere

and all gets trapped inside which makes wear even worse.

[necronomicon]

Thanks Willy, that sounds like good advice, cheers!