GROUP 4 HYDRAULIC SYSTEM

1. HYDRAULIC COMPONENTS MOUNTING 1

Solenoid
A 4 valve
Air breather
2
4 4

Main pump
3
4

Hydraulic tank 6
7
Spin filter
4

Main control valve

4 Turning joint

5
10
5
9

Swing motor 5

RCV-LH VIEW A
4 7 Main pump
1 housing

RCV-RH Terminal 7

1 8
Coupling

4
RCV-pedal
Cross 4

4
4 5

1407A9CM05

ÂTightening torque

Item Size kgfÂm lbfÂft Item Size kgfÂm lbfÂft

1 M 6Ý1.0 1.05Ü0.2 7.6Ü1.45 6 M12Ý1.75 14.7Ü2.2 106Ü15.9
2 M 6Ý1.0 1.44Ü0.3 10.4Ü2.2 7 M16Ý2.0 22Ü1.0 159Ü7.2
3 M 8Ý1.25 2.5Ü0.5 18.1Ü3.6 8 M16Ý2.0 22.5Ü0.5 163Ü3.6
4 M10Ý1.5 6.9Ü1.4 49.9Ü10.1 9 M16Ý2.0 29.6Ü3.2 215Ü23.1
5 M12Ý1.75 12.2Ü1.3 88.2Ü9.4 10 M20Ý2.5 45Ü5.1 325Ü36.9

9-6
2. HYDRAULIC COMPONENTS MOUNTING 2

Double acting attachment piping

3
3
Travel motor(RH)
3
3 4

Stop valve
4

D/acting
3 way joint

D/acting
3 hose joint
Travel motor(LH)

3
Arm safety lock system

2
Boom safety lock system 2
Boom safety Arm safety
lock valve lock valve

1
1

2
Arm cylinder
Boom cylinder 1
1407A9CM14

ÂTightening torque

Item Size kgfÂm lbfÂft Item Size kgfÂm lbfÂft

1 M 8 Ý1.25 4.05Ü0.8 29.3Ü5.8 3 M12Ý1.75 12.8Ü3.0 92.6Ü21.7
2 M10Ý1.5 8.27Ü1.7 59.8Ü12.3 4 M16Ý2.0 23Ü2.5 166.3Ü18.1

9-7
3. HYDRAULIC COMPONENTS MOUNTING 3

4
Solenoid valve

6
Check valve
1
1 7
4

Cartridge
Coil
5

BOOM CYLINDER 6

1
3
3
2 3
2

ARM CYLINDER BUCKET CYLINDER

1407A9CM07

ÂTightening torque

Item Size kgfÂm lbfÂft Item Size kgfÂm lbfÂft

1 M10Ý1.5 3.2Ü0.3 23.1Ü2.2 5 - 0.4 2.9
2 M10Ý1.5 5.4Ü0.5 39.1Ü3.6 6 - 2.0 14.5
3 M12Ý1.75 5.5Ü0.6 39.8Ü4.3 7 - 2.5 18.1
4 M18Ý1.25 2.7Ü0.3 19.5Ü2.2

9-8