Hitachi ZW180 Technical Manual page 337

Operational principle, wheel loader
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24
23
22
21
20
19
1 - Solenoid Body
2 - Valve Body
3 - Cover
4 - Forward Emergency Travel
Spool
5 - Forward Modulation Spool
6 - Forward Modulation Spring
COMPONENT OPERATION / Drive Unit
1
7 - Reverse Emergency Travel
Spool
8 - Reverse Modulation Spool
9 - Reverse Modulation Spring
10 - 1st Speed Modulation
Spool
11 - 1st Speed Modulation
Spring
12 - 2nd Speed Emergency
Travel Spool
From
Charging Pump
13 - 2nd Speed Modulation
Spool
14 - 2nd Speed Modulation
Spring
15 - 3rd Speed Modulation
Spool
16 - 3rd Speed Modulation
Spring
17 - 4th Speed Modulation
Spool
18 - 4th Speed Modulation
Spring
T3-9-31
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
T4GD-03-09-011
19 - 4th Speed Proportional
Solenoid Valve
20 - 3rd Speed Proportional
Solenoid Valve
21 - 2nd Speed Proportional
Solenoid Valve
22 - 1st Speed Proportional
Solenoid Valve
23 - Reverse Proportional
Solenoid Valve
24 - Forward Proportional
Solenoid Valve

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