One
of
my
Central
Locomotive
Works
(CLW)
engines
had
a
drive
mechanism
problem.
It
was
very
stiff
to
turn
or
at
least
for
the
motor
to
overcome
the
resistance.
Come
to
find
out
one
of
the
plastic
gear
boxes
had
wore
out
and
deformed.
The
gear
boxes
are
axsle
mounts
as
a
worm
gear
configuration.
The
gear
box
in
my
case
did
not
contain
bearings
or
any
type
of
bronze
bushings.
However,
I
may
say
after
so
many
years
of
service
these
performed
well
and
had
a
long
life.
One
photo
shows
a
new
original
gear
box
housing
from
CLW
for
comparison
purposes.
Rather
than
replicate
the
exact
enclosure
shells,
I
went
a
step
further
to
develop
2
piece
shell
that
is
secured
with
2-56
hex
head
screws
3/4"
long
so
that
the
bottom
screws
could
accommodate
electrical
wipers
on
the
wheels
for
electrical
pick
up.
A
rather
passive
or
non
intrusive
way
to
get
current
without
impacting
the
mechanism
or
the
performance
of
the
truck.
Pictured
is
the
original
gear
box
that
was
held
together
with
2
screws
verses
my
new
version
to
house
the
gears.
Once
assembled,
some
running
maybe
required
to
break
them
in
if
they
are
slight
tight
as
the
tolerances
are
very
close.
Each
piece
will
need
some
clean
up
prior
to
assembly
due
to
the
support
structure
on
the
printer
build
plate.
The
gearbox
is
printed
using
the
PRUSA
ABS
filament,
the
parts
are
sold
as
is
straight
off
the
Prusa
Printer
build
plate,
all
sales
final
no
returns.
Made
In
The
USA.