Case CX160B - Hydraulic System Details; Pump and Control Systems; Hydraulic Functions; Hydraulic Cylinder Specifications

Lep SM160B1002-1EN Issued 07-09
1002-12
Hydraulic system
Hydraulic pump drive system, directly coupled to the engine (no transmission)
Main pump
Manufacturer...............................................................................................................................................Kawasaki
Pump type .............................................................................................. double variable displacement piston pump
Displacement volume .................................................................................................. 65.2 cm
3
(3.98 cu in) x 2 /rev
Rated operating pressure ..........................................................................................................34.3 MPa (4975 psi)
Maximum operating pressure .................................................................................................... 36.3 MPa (5265 psi)
Input revolution speed.............................................................................................................................. 2200 min-1
Maximum discharge flow ........................................................................142.5 L/min (37.64 gpm) x 2 at 2200 min
-1
Pilot pump
Pump type ............................................................................................................................................... Gear pump
Displacement volume ............................................................................................................ 10 cm
3
(0.61 cu in)/rev
Operating pressure......................................................................................................................3.92 MPa (568 psi)
Maximum flow................................................................................................... 22 L/min (5.81 gpm) (at 2200 min
-1
)
Control method
Hydraulic simultaneous constant output control.
Maximum flow adjustment control through external commands (negative control).
Setting horsepower adjustment control through external command current.
Control Valve
Model; 4-spool section: integrated (1) or 5-spool section: integrated (1)
Operation method: hydraulic pilot method: travel, swing and operating machine
Maximum flow .................................................................................................143 L / min (37.78 gpm) (at 2200 min-1)
Main relief set pressure........................................... standard; 34.3 MPa (4975 psi), power boost 36.3 MPa (5265 psi)
Overload set pressure......................................................................................when boom down; 32.3 MPa (4685 psi)
.............................................................................................................................................other: 38.2 MPa (5540 psi)
Foot relief set pressure ............................................................................................................... 2.55 MPa (369.85 psi)
Functions
Straight travel circuit
Boom up / arm 2 pumps internal flow
Boom and arm load holding circuit
Boom-down regenerative circuit
Bucket-close regenerative circuit
Arm-in forced regenerative circuit
Swing priority variable orifice (for arm operation)
2 pumps flow
Variable foot relief
Hydraulic Cylinders
Boom cylinder (x2)
Cylinder bore .............................................................................................................................Ø115 mm (Ø4.53 in)
Rod diametre ...............................................................................................................................Ø80 mm (Ø3.15 in)
Maximum retracted lenghth ........................................................................................................ 1698 mm (66.85 in)
Stroke ......................................................................................................................................... 1179 mm (46.42 in)
Articulated boom cylinder
Cylinder bore .............................................................................................................................Ø140 mm (Ø5.51 in)
Rod diametre ...............................................................................................................................Ø90 mm (Ø3.54 in)
Maximum retracted lenghth ........................................................................................................ 1385 mm (54.53 in)
Stroke ........................................................................................................................................... 840 mm (33.07 in)
Arm (dipper) cylinder
Cylinder bore .............................................................................................................................Ø125 mm (Ø4.92 in)
Rod diametre ...............................................................................................................................Ø90 mm (Ø3.54 in)
Maximum retracted lenghth ........................................................................................................ 1830 mm (72.05 in)
Stroke ......................................................................................................................................... 1280 mm (50.39 in)
Bucket cylinder
Cylinder bore .............................................................................................................................Ø105 mm (Ø4.13 in)
Rod diametre ...............................................................................................................................Ø75 mm (Ø2.95 in)
Maximum retracted lenghth ........................................................................................................ 1507 mm (59.33 in)
Stroke ........................................................................................................................................... 985 mm (38.78 in)