Sakai SW800 Series, Руководство по ремонту

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2-036
Vibrating System
2) Amplitude selector switch set to High amplitude [ ]
Terminal 4 connects to terminal 5. Solenoid (a) of the front amplitude select valve and solenoid
(b) of the rear amplitude select valve are energized. At the same time, front vibrator relay (2)
and rear vibrator relay (3) are energized.
★
For function of relays, see page 2-036.
4. Operation of amplitude selector switch, relays and solenoids
1) Frequency selector switch in Low frequency position [ ] (Not affected by amplitude selector
switch.)
Terminals 1 and 2 of the frequency select switch connect with each other to directly energize
solenoid (a) of the frequency select valve. Solenoid (a) moves the pump swash plate to Low
Delivery position. This offers Low frequency.
2) Frequency selector switch in Medium frequency position [ ] (terminal 1 connects with
terminal 3) with amplitude selector switch in Low amplitude position [ ] (terminal 1 connects
with terminal 2)
Current from terminal 3 of the frequency selector switch flows through terminals 3 and 2 of
vibration relay (1), energizing solenoid (b). At the same time current is fed to terminal 3 of relay
(2). At this time, the system is not enfluenced by relay (2), because relay (2) remains
deenergized. Solenoid (b) shifts the pump swashplate to Medium delivery position. This gives
Medium delivery.
3) Frequency selector switch in Medium frequency position [ ] (terminal 1 connects with
terminal 3) with amplitude selector switch in High amplitude position [ ] (Terminal 4
connects with terminal 5.)
★
For current flow from the frequency selector switch, see item 3-2) above.
Terminals 3 and 5 of vibration relay (2) connect with each other and current from the
frequency selector switch energizes solenoid (b) of the frequency select valve. This
gives the same frequency (Medium frequency) as in item 4-2) above.
4) Frequency selector switch in High frequency position [ ] (Terminals 1 and 4 connect with
terminals 3 and 5 respectively) with amplitude selector switch in Low amplitude position [ ]
(terminal 1 connects with terminal 2)
Current flow from terminal 3 of the frequency selector valve is the same as in item 4-2)
above, however, current from terminal 5 passes through terminals 3 and 2 of vibration relay
(3) to the coil of relay (1) to energize it. This disconnects terminal 3 from terminal 2.
Solenoids (a) and (b) of frequency select solenoid valve are not energized. This sets the
swashplate to High delivery position, providing High frequency.
5) Frequency selector switch in High frequency position [ ] (terminals 1 and 4 connect with
terminal 3 and 5 respectively) with amplitude selector switch in High amplitude position [ ]
(terminal 4 connects with terminal 5.)
★
The connection and circuit formation are the same as those in item 4-4) above.
★
For current flow from the amplitude selector switch, see item 3-2) above.
1. Current from terminal (3) of the frequency selector switch is simultaneously fed to terminal (3)
of relays (1) and (2). Current is fed to solenoid (b), because relay (2) is energized to connect
terminal 3 with terminal 5 of relay (2).
2. On the other hand, current from terminal 5 of the frequency selector switch does not pass to
relay (1), because relay (3) remains energized to disconnect its terminal 3 from terminal 2.
Relay (1) remains deenergized. As a result, current from terminal 3 of frequency selector
switch is fed to solenoid (b) of amplitude select valve. The pump offers Medium delivery
(Medium frequency).
* As described in item 5-5) above, if the amplitude selector switch is in High amplitude position,