Installation Instructions
B1700·B2100·B2400
WSM,11772
IlII
Right Turning
I I
High
Pressure
c=J
Low
Pressure
B193F705
1.
When the steering wheel
is
turned clockwise, the
stub shaft
(7) starts
turning,
but
the sector gear
shaft
(1), ball
nut
(2) and worm shaft (3) remain
motionless under
the
load
of
the tires.
This
means
that
the
torsion bar (4) gets under torsional force
and
that
stub shaft (7) and
the
worm shaft (3) start
turning
in a relative displacement, the spool part
of
the
stub shaft (7) turns clockwise
with
respect
to
the
sleeve (5).
IlII
Manual Operation
(When Engine Stops
or
Hydraulic Circuit Troubles)
Even
when
the
engine stops or hydraulic
circuit
malfunctions thus leading
to
hydraulic
operation
stop,
manual
operation
is
possible.
However,
naturally, steering wheel requires a larger operating
power.
If
the
steering
wheel
is
turned
when
hydraulic
7
STEERING
(1)
Sector Gear Shaft
(2)
Ball
Nut
(3)
Worm
Shaft
8 (4)
Torsion Bar
(5)
Sleeve
(6)
Valve Housing
(7)
Stub Shaft
(8)
Relief Valve
(A)
Chamber
"A"
(B)
Chamber
"B"
(a)
Port"
a"
(b)
Port
"b"
2.
At
this time, the oil
passage
from pump
to
port
"a"
and oil
passage
from
port
"b"
to
are closed.
Therefore, the pressure-fed oil from pump
flows
to
the chamber
"B"
through
port
"b".
Thus,
the
ball
nut
(piston) (2)
is
pushed, and the sector gear
shaft
(1)
is
rotated in the direction
of
the arrow.
circuit
ceases
to
operate, the
worm
shaft (3) which
is
connected
with
stub shaft (7) moves
slightly
by
steering force, then the worm shaft
(3) and ball
nut
(2) have
same
relationship
with
the
manual steering
gear.
E7-M4