TCM FB-8 Series, Руководство по обслуживанию

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(1) Operation of orbitrol
(a) In “Neutral”
While the steering wheel is in straight
position, the oil from the pump flows through oil
passage
①
to oil groove
②
. The sleeve has 24
oil holes
③
which are now in line with the holes
④
in the spool so that the oil that flowed into
groove
②
passes through oil holes
③
and
④
to
space
⑤
between the spool and drive shaft. Then
the oil flows through spool groove
⑥
and sleeve
groove
⑦
back to the oil tank.
Since cylinder ports
⑳
and
21
are respectively
open to oil holes
⑱
and
⑰
in the sleeve but not
to groove
⑯
nor
⑲
in the spool, the oil in the
cylinder does not go any where.
Oil passage
⑮
that leads to the hydraulic motor
is open to oil hole
⑭
in the sleeve which is used
as the inlet and outlet for the hydraulic motor, but
not to grooves
⑬
nor
⑯
in the spool and thus the
oil remain unmoved.
(b) When steering wheel is turned counterclock-
wise
As the steering wheel is turned counterclock-
wise, the grooves in the spool shift to the left in
relation with the holes and grooves in the sleeve
so that holes
④
in the spool get out of line with
holes
③
in the sleeve. The oil that has flowed into
groove
②
thus far begins to flow into hole
⑫
in
the sleeve, passing through grooves
23
and
⑬
in
the spool, hole
⑭
in the sleeve, and oil passage
⑮
in the housing, to the hydraulic motor.
The hydraulic motor thus rotates in the
counterclockwise direction and the oil discharged
from the hydraulic motor flows through oil hole
⑭
in the sleeve, groove
⑯
in the spool, and oil
hole
⑱
in the sleeve to the cylinder port L in the
housing and thus actuates the steering cylinder.
Fig. 6A.8
Fig. 6A.9
6A. STEERING SYSTEM (ORBITROL type)