Sakai SW800 Series, Руководство по ремонту

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2-013
Description and Operation of Hydraulic System
SW8002007
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VIEW A
A
2. Description and Operation of Hydraulic System
2-1. Structure of hydraulic pump and motor
2-1-1. Propulsion pump/vibrator pump ass’y
Propulsion pump:
1. Port A (reverse travel)
2. Port B (forward travel)
3. Multi-function valve
(port A)
4. Multi-function valve
(port B)
5. Circuit pressure gauge
port (Port A)
6. Circuit pressure gauge
port (port B)
7. Charge relief valve
8. Charge circuit pressure
gauge port
9. Control valve
10. Servo piston
11. Cut-off valve
Vibrator pump:
12. Port A2 (front circuit)
13. Port A3 (rear circuit)
14. Circuit pressure gauge port (port A2)
15. Circuit pressure gauge port (port A3)
16. Suction port
17. Frequency (delivery) select valve
Specifications (propulsion pump)
• Model
: A4VG90HW
• Max. displacement
: 90cm 3 /rev(cc/rev)
• Relief valve setting
: 40.2MPa (410kgf/cm 2 ) {5830psi}
• Cut-off valve setting
: 37.3MPa (385kgf/cm 2 ) {5470psi}
• Charge circuit setting
: 2.5MPa (25kgf/cm 2 ) {355psi}
Specifications (vibrator pump)
• Model
: AP2D36
• Max. displacement
: 28cm 3 /rev(cc/rev) x 2
• Circuit pressure setting
: 22.5MPa (230kgf/cm 2 ) {3270psi}
(Set by amplitude select valve)