1-21
GEAR PUMP
GEAR PUMP
MAIN CONTROL VALVE
MAIN CONTROL VALVE
SWING MOTOR
SWING MOTOR
Specification
Fixed displacement gear pump single stage
15 cc/rev
40 kgf/cm
2
(570 psi)
27
ℓ
/min (7.1 U.S. gpm / 5.9 U.K. gpm)
Specification
Axial piston motor
169.4 cc/rev
300 kgf/cm
2
(4270 psi)
Automatic, spring applied hydraulic released
70 kgf
·
m (506 lbf
·
ft)
26 kgf/cm
2
(370 psi)
2 - stage planetary
3)
3)
4)
4)
5)
5)
[ ]: Power boost
TRAVEL MOTOR
TRAVEL MOTOR
6)
6)
Item
Type
Capacity
Maximum pressure
Rated oil flow
Item
Type
Capacity
Relief pressure
Braking system
Braking torque
Brake release pressure
Reduction gear type
Item
Specification
Type
10 spools
Operating method
Hydraulic pilot system
Main relief valve pressure
350 kgf/cm
2
(4980 psi) [380 kgf/cm
2
(5400 psi)]
Port relief valve pressure
Boom
400 kgf/cm
2
(5690 psi)
Arm
400 kgf/cm
2
(5690 psi)
Bucket
400 kgf/cm
2
(5690 psi)
Item
Specification
Type
Variable displacement axial piston motor
Relief pressure
350 kgf/cm
2
(4980 psi)
Capacity (max / min)
154.8/88.5 cc/rev
Reduction gear type
3-stage planetary
Braking system
Automatic, spring applied hydraulic released
Brake release pressure
9 kgf/cm
2
(128 psi)
Braking torque
40 kgf
·
m (290 lbf
·
ft)
