Hyundai R 160 LC-3, Service Manual

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2-64
If the changeover pilot pressure Ps is shut off, the valve is brought to the condition in Fig. As the result
the piston chamber is connected with the drain line in the motor casing.
Consequently, the swash plate is pressed by the combined force of the propelling force of the piston
high pressure and the spring force till the face A of the swash plate comes in contact with the casing to
stabilize the swash plate. On that occasion, the tilting angle(
ѭ
) of the swash plate is and the motor
revolution gets to the 1st shift(low speed)condition.
If the changeover pilot pressure is shut off at an engine stop or on some other occasion, the swash plate
is pressed by the spring action till it contacts face A of the casing. The swash plate takes a tilting
angle(
ѭ
) a then to pick up the 1st shift(Low speed).
(2) Low speed control
M
2
R/G
M
1
D
r
P
s
P
2
P
1
D
r
2 speed
changeover valve
Pilot
pressure
Ps 0kg/cm 2
M
1
M
2
Side C
F
p
High
pressure Low
pressure
Valve plate
Swash plate
Side B
Steel ball
2 speed
control valve
F
s
Side A
Swash face
Piston chamber
Ѯ