Hydraulic Component; Main Pump System - Hitachi EH 4000AC-3 Technical Manual

Hydraulic Component

Main Pump System

1 2
4
A
9
A
6
F- Front
1- Main Pump 1 (for Hoist)
2- Main Pump 2 (for Steering)
3- Gear Pump (for Rear Brake
Cooling Oil)
4- Hoist Priority Valve
TOQFB-EN-00(20180620)
SECTION 1 GENERAL
Group 2 Component Layout
3
TQFB-01-02-005
1, 2, 3
TQFB-01-02-006
R- Rear
5- Hoist Control Valve
6- Line Filter
7- 4-Spool Proportional Control
Solenoid Valve
8- Hoist Cylinder
R
13
8
5
F
B
B
10
9- Fitter (for Rear Brake Cooling
Oil)
10- RCB (Relief Check Bleed) Valve
11- Reducing Valve (for Pilot Oil
Pressure)
T1-2-14
3 2
7
A - A
B - B
12- Reducing Valve (for Load /
Dump Brake)
13- From Hydraulic Oil Tank
F
1
9
6
TQFB-01-02-007
R
12
11
TQFB-01-02-008