5.42
1.2 Gear casing
The rotating parts
of
the HBW transmission are accomodated in
an
oil-tight casing
divided
into
two
halves in the plane
of
the vertical axis.
Amply
dimensioned cool-
ing ribs ensure good heat dissipation and mechanical rigidity.
An
oil
filler
screw
with
dipstick and
an
oil
drain plug are screwed
into
the gear
casing. The
filler
screw
is
provided
with
a breather hole.
The shaft
for
actuating the multiple-disc clutch extends through a cover on the
side
of
the
gear
casing.
1.3 Gear
sets
The transmission
is
equipped
with
shaved, casehardened'helical
gears
made
of
forged low-carbon alloy steel. The multi-spline driving shaft connecting the trans-
mission
with
the engine
is
hardened
as
well.
The driven shaft (propeller side)
of
the transmission
is
fitted
with
a forged coupling
flange.
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