Swing Device; Control Valve; Travel Device - Hitachi ZX 38U-5A Technical Manual

Swing Device

Control Valve

5
4
14
1- Relief Valve
2- Counterbalance Valve
3- Travel Mode Selector Valve
4- Make-Up Valve (Boom Swing
(Left))
5- Overload Relief Valve (Arm
Roll-Out)
SECTION 1 GENERAL
Group 2 Component Layout
T1M7-01-02-004
8
7
6
11 10
12
13
TADB-01-02-004
6- Main Relief Valve (Main Pump
P2)
7- Boom Anti-Drift Valve
8- Overload Relief Valve (Bucket
Roll-Out)
9- Overload Relief Valve (Bucket
Roll-In)

Travel Device

1
9
10- Overload Relief Valve (Boom
Lower)
11- Overload Relief Valve (Boom
Raise)
12- Main Relief Valve (Main Pump
P1)
T1-2-8
2 3
T1M7-01-02-006
13- Overload Relief Valve (Arm
Roll-In)
14- Main Relief Valve (Main Pump
P3)