Daewoo Solar 420LC-V, Manual

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S0707365
Page 5
Travel Motor (With Gearbox) (A6V160HD)
2. Brake Valve
A. During Travel.
If the pressure oil is supplied from port A, this oil opens the valve (130), flows into the inlet port
C of the hydraulic motor, and turns the hydraulic motor.
At the same time, the oil, which flows from a small hole of the spool (126) to the chamber b
through passage a, exerts pressure on the spool section, and moves the spool to the left over
spring (128) force.
As the spool moves, port D at the return side of the motor and part B at the tank are connected
together by a hole in the spool, and the motor turns as the return oil from motor flows into the
tank.
By the movement of spool (126), the pressure oil goes into port P and S. In port P, the pressure
oil releases the parking brake force and moves the piston of parking brake.
In port S. the pressure oil goes into chamber t, presses the stopper (157) of the inner surface of
the main body, prevents the spool (137) from moving, and closes port C during driving. If the
pressure oil is supplied from port B, the spool (120) and the valve (130) operate in reverse, and
rotate in the opposite direction.
Figure 3