Hitachi ZW180 Technical Manual page 193

1 - Spring
2 - Sleeve 1
3 - Spool 1
COMPONENT OPERATION / Pump Device
2
5 6
4 - Piston
5 - Load Piston
6 - Spool 2
3
7
10 11
12
7 - Sleeve 2
8 - Inner Spring
9 - Outer Spring
T3-1-5
4 1
8 9
10 - Servo Piston 1 (2 Used)
11 - Swash Plate
12 - Servo Piston 2
T4GB-03-01-007