Sakai SW800 Series, Руководство по ремонту

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2-033
Vibrating System
2-4-6. Description and operation of vibrating system
IN
OUT
T2
A
A
PF
S2
A2
A3
IN
OUT
A1
B1
A B
T1
T1
A B
A B A B
A B 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
11
4
From Orbitrol
12
a
b
SW8002024
High amp.
Low amp. Low amp. High amp.
Description
• Made up of vibrator pump assembly (4),
front amplitude select valve (5), rear
amplitude select valve, front vibrator motor
(7), rear vibrator motor (8), front vibrator
(9) and rear vibrator (10).
Basic function of vibrator pump and
motor
• Vibrator pump
A piston pump (twin pump) is in use. A
pump delivery select solenoid valve
selects three steps of delivery (three steps
of frequency).
• Vibrator motor
A bent axis type fixed displacement piston
motor is used. The displacement per
rotation of motor shaft is not variable.
Operation
• The vibrator pump delivers an amount of
oil set by the frequency selector switch,
which is drained to the tank via frequency
select valves (5), (6) and oil cooler (11).
★ Only the rear propulsion circuit
includes an oil cooler.
• The frequency select solenoid valves
provide:
Maximum delivery when solenoids (d) and
(e) are not energized.
Medium delivery when solenoid (e) is
energized.
Minimum delivery when solenoid (d) is
energized.
• If the amplitude selector switch selects
Low amplitude or High, spool (f) of
amplitude select valve moves to block the
unload circuit and feeds the vibrator
motors. Oil drives vibrator motors (7) and
(8), being dumped to the tank via one-way
valves (i) and oil cooler (11).
★
The oil cooler is included in the rear
vibrator circuit only.