Hitachi ZW180 Technical Manual page 343

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When Operating of Manual Spool
1 - Modulation Spring
2 - Forward Modulation Spool
COMPONENT OPERATION / Drive Unit
c 1
From
Charging
Pump
3 - Forward Emergency Travel
Spool
4 - Reverse Modulation Spool
From Charging
Valve
a
Forward
Clutch
To Each
Clutch
5 - Reverse Emergency Travel
Spool
6 - 2nd Speed Emergency
Travel Spool
T3-9-37
b
2
3
4
5
d
Reverse
Clutch
f
2nd speed
Clutch
6
7
e
T4GD-03-09-012
7 - 2nd Speed Modulation
Spool