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B1700·B2100·B2400
WSM,
11770
[3]
OIL
FLOW
Neutral Position
[=:J
Low
Pressure
B177F703
7
STEERING
@@
(A)
From Pump
(Through
Flow
+
+
Priority
Valve)
I
(B)
To
HST
Unit
(HST Type)
or
5
Transmission
Case
(Manual
Transmission Type)
(1
)
Sector Gear
Shaft
(2)
Ball
Nut
(3)
Worm
Shaft
(4)
Reaction Pistons
(5)
Centering
Spring
(6)
Valve Housing
(7)
Spool
When
the
steering wheel
is
not
turned, the valve
is
placed in
the
neutral
position
by
the
centering
springs
(5)
and pressurized reaction pistons
(4).
Therefore,
there
is
no
difference
betwee,n
Left Turning
pressures
on the right and
left
cylinder chambers.
And the ball
nut
(2)
and sector gear shaft
(1)
do
not
move.
So,
the
front
wheels keep
the
direction.
©©
High
Pressure
[=:J
Low
Pressure
B177F704
10
(1
)
Sector Gear
Shaft
(2)
Ball
Nut
(3)
Worm
Shaft
(4)
Thrust
Race
(5)
Reaction Piston
(6)
Centering
Spring
(7)
Valve Housing
(8)
Spool
(9)
Ball
(10)
Relief Valve
(A)
Chamber
"A"
(B)
Chamber
"B"
(C)
From Pump
(0)
To
HST
Unit
or
Transmission Case
(a)
Port
"a"
(b)
Port
"b"
1.
When
the
steering
wheel
is
turned
counterclockwise,
the
worm
shaft
(3)
is
also
turned.
However,
front
wheel load stops sectors gear
shaft
(1)
and ball
nut
(piston)
(2)
from moving,
and only
worm
shaft
(3)
turns counterclockwise.
Then, due
to
the
reaction,
the
worm
shaft
(3)
moves upward a little. And
the
thrust race (4)
pushes
the
spool (8), reaction
piston
(5) and
centering springs
(6).
2.
At
this time,
the
oil
passage
from pump
to
port
"b"
and oil
passage
from
port
"a"
are closed.
Therefore, the pressure-fed oil from pump
flows
to
the
chamber
"A"
through port
"a".
Thus,
the
ball
nut
(piston)
(2)
is
pushed, and the sector gear
shaft
(5)
is
rotated in the direction
of
the arrow.
7-M3
28


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  • My b2100 (1999) brake s work fine, but the handle to lock them doesn't work any longer. Feels like something is disconnected. Anyone have and answer or a schematic? Submitted on 23-11-2021 at 05:14

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