Case CX490C, Service Manual

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INTRODUCTION
Shoe
Applicability CX490C (LC), CX500C
(LC) (MASS Excavator)
Weight or Quantity
600 grouser 2581 kg ( 5690.131 lb )
Link 1 set
Shoe 50
Bolt 200
Nut 200
750 grouser 2930 kg ( 6459.544 lb )
Link 1 set
Shoe 50
Bolt 200
Nut 200
Upper component
Swing unit
Swing motor assembly
Swing motor
Manufacturer Hyest Corporation
Motor type Fixed displacement piston motor
With parking brake
Intake amount 250 cm³/rev ( 15.26 in³/rev )
Operating pressure 29.4 MPa ( 4264 psi )
Operating flow 360 l/min ( 360.0000 US gpm )
Mechanical brake torque 1288 N·m ( 949.980 lb ft ) min.
Brake off pressure 2.9 MPa ( 421 psi ) or less
Relief valve set pressure 29.4 MPa ( 4264 psi )
Swing reduction gear
Reduction gear type Planetary gear 2-stage reduction gear
Dry weight 537 kg ( 1183.882 lb )
Turntable bearing
No. of teeth 92
Weight 656 kg ( 1446.232 lb )
Counterweight
Weight CX500C (LC) (MASS
Excavator) 10000 kg ( 22046.226 lb )
Weight CX490C/CX490C (LC) 9180 kg ( 20238.436 lb )
Engine-related
Engine
Engine model name Isuzu 6UZ1X diesel engine
Engine type
4-cycle, water-cooled, overhead camshaft type, vertical in-line, direct
injection type (electronic control)
Number of cylinders-bore-stroke 6 -
∅
120 mm ( 4.72 in ) - 145 mm ( 5.71 in )
Total displacement 9.839 L ( 2.599 US gal )
Compression ratio 17.5
Rated output 270 kW ( 367.10 Hp ) / 2000 RPM
Maximum torque 1363 N·m ( 1005.3 lb ft ) / about 1500 RPM
Fuel consumption ratio 227.6 g/kWh or lower.
Engine dry weight About 840 kg ( 1851.883 lb )
Engine dimension
L 1235 mm ( 48.6220 in ) - W 935 mm ( 36.811 in ) - H 1260 mm
( 49.6063 in )
Cooling fan
∅
1016 mm ( 40.000 in ) - suction type - 6 vanes, plastic and steel
Pulley ratio
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