Assembly - THE GEARBOX
BRUTUSBOT
Step 4 - Gearbox Assembly: Make a decision now if you want a fast
but weak, or slow and strong BrutusBot, because it’s time to build
the gearbox! Converting it later
is
possible, but not that easy.
Want fast/weak? Built the Tamiya gearbox in ‘A’ (58:1 gear ratio)
configuration. Want slow/strong? Build ‘C’ (203:1 gear ratio)
configuration. Look at the
Tamiya twin motor
gearbox instruction
manual for details.
Step 5 - Spur Gear installation: We prefer to use the
large spur
gear
, and designed the chassis to fit the treads using it. If you
really want
to use the small spur gear, be our guest, but we can’t
guarantee the fit of the treads.
Push the spur gears onto your gearbox output axles until they don’t
travel any further (requires some force).
Note:
The little blue tube that comes with the Tamiya twin motor
gearbox is a
tube of grease.
This is vital for stopping high-pitched
squealing from the gearbox!
Apply the grease in the locations shown in
the Tamiya instruction diagrams (darker
shaded spots on the gears & housing), and
especially to both sides of the
inner hub
of
the crown gear.
5
Grease the
crown gear!
