Sakai SW800 Series, Руководство по ремонту

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2-034
Vibrating System
• The amplitude select (Vibrator motor
rotating direction select) valves provide:
- High amplitude when solenoid (d) of front
valve (5) and solenoid (e) of rear valve
(6) are energized.
- Low amplitude when the opposite
solenoids are energized.
★
For operation of the solenoid valve,
see descriptions on page 2-035.
Operation of port relief valves
• Even if the amplitude select valve is
brought to the neutral position, the vibrator
shaft tends to continue rotation due to
enertia. On the other hand, there is a
shortage of oil in the feed line (line which
feeds oil to motor) of the motor, because
ports A1 and B1 are blocked.
• Then the one-way valve mounted in port
relief valve (h) on the low pressure side
opens to feed part of oil in the return line
to the motor.
• In addition, because the outlet port of the
motor stays closed, oil displaced from the
enertia-rotating motor flows into the return
line by opening the port relief valve in the
outlet circuit.
Circuit protection
* See the circuit diagram on page 2-033.
• If the system pressure rises to the setting
of relief valves (g) built in solenoid valves
(5) and (6), the relief valves open to
protect the circuit.
A
A
PF
S2
A2
A3
IN
OUT
A1 B1
A
B
T1 T1
A B
A1 B1
T
P
P T
9 10
7
8
5
6
h
h
d
g
i
f
e
h h
d
g
i
f
e
4
SW8002025
From Orbitrol