Hitachi ZW180 Technical Manual page 213

7
1 - Bucket Flow Rate Control
Valve
2 - Negative Control Valve
3 - Overload Relief Valve
(Bucket: Bottom Side)
NOTE: *
Refer to T3-2-3.
COMPONENT OPERATION / Control Valve
*
9
Section A
*
Section B
9
4 - Overload Relief Valve
(Bucket: Rod Side)
5 - Overload Relief Valve
(Lift Arm: Bottom Side)
6 - Make-Up Valve
(Lift Arm: Rod Side)
2
7 - Restriction Valve
8 - Low-Pressure Relief Valve
9 - Main Relief Valve
T3-2-5
8
7
T4GB-03-02-005
8
T4GB-03-02-006
10 - Load Check Valve
(Arm Lift Circuit)
11 - Load Check Valve
(Bucket Circuit)