Installation Instructions
3
TRANSMISSION
[4]
DIFFERENTIAL
GEAR
(1) Differential Function
B1700·B2100·B2400 WSM,11770
B177F321
(1) Spiral Bevel Pinion
(2)
Differential
Pinion
(3)
Differential
Side Gear
(4) Spiral Bevel Gear
(5)
Differential
Pinion Shaft
(6)
Differential
Pinion
(7)
Differential
Side Gear
(8)
Differential
Case
1.
During Straight Running
Rotation
of
the
spiral
bevel
pinion
(1)
is
transmitted
to
the
spiral
bevel
gear
(4)
and
differential
case
(8).
When
road resistance
to
the
right
and
left
wheels
are equal,
differential
pinions (2),
(6)
and
differential
side gears (3),
(7)
are all rotate
as
a unit. Both rear
axles received equal
input,
and both wheels
turn
at
the same speed,
allowing
the
tractor
to
go
straight
ahead.
At
this time,
differential
pinions (2), (6)
do
not
rotate around
the
differential
pinion shaft
(5).
2.
During Turning
When
the
tractor
turns,
the
road resistance
to
the
inside
tire
increases
(as
if
braking
is
applied
to
that
side only).
In
other words,
if
one
of
tires slows
down,
revolution difference
is
generated in
the
differential
side gears (3),
(7).
When rotation
of
one
differential
side gear becomes
lower
than
the
other,
differential
pinions (2),
(6)
begin
rotating
around
differential
increased
in
speed by
the
speed
increment
of
differential
pinion
rotating
around
differential
pinion shaft. This means
that
rotation
of
one rear
axle
is
slowed
down
and
that
of
the
other
rear axle
is
increased. Thus, the
tractor
turn
smoothly
without
power
loss.
The
combined number
of
revolutions
of
the
right
and
left
differential side gears
is
always
twice
that
of
the
spiral bevel gear (4).
When
spiral bevel
gear
revolution
is
100
rpm, and
if
one
of
the
differential
side gears stops moving,
the
revolution
of
the
other
differential side gear becomes
200
rpm and
if
one
rotates
at
50
rpm, the
other
rotates
at
150
rpm.
3-M16