Case CX490D - Page 54

INTRODUCTION
Hydraulically-operatedfanmotor
Manufacturer
KOMATSULTD.(DEALTINBYKOMATSUZENOAHLTD.)
Absorptionamount
40cm³/rev
Allowablepeakpressure
31.9MPa(4627psi)
Normal
operation
pressure
2.0MPa(290.1psi)orless
Tportpressure
Peakpressure4.4MPa(638.2psi)orless
Normal
operation
pressure
0.10MPa(14.5psi)orless
Drainpressure
Peakpressure0.15MPa(21.8psi)orless
Suctionvalveperformance
Suction
performance
20.0L/min(5.3USgpm)at0.10MPa(14.51psi)
Crackpressure
19.6MPa(2843.0psi)at5.0L/min(1.3USgpm)
Safetyvalveperformance
Reseat
pressure
14.7MPa(2132.2psi)at5.0L/min(1.3USgpm)
Ratedpressure17.8MPa(2581.9psi)
Ratedowrate
64.0L/min(16.9USgpm)
Maximumoperatingspeed
1600RPM
Minimumoperatingspeed
1000RPM
Directionofrotation
Bothdirections
Reliefvalvesetpressure
24.5MPa(3553.7psi)
Operatingtemperaturerange-20.0°C(68.0°F)—100.0°C(212.0°F)
HydraulicuidusedISOviscositygradeVG46equivalenthydraulicuid
Controlmethod
Flowadjustmentcontrolbyexternalcommandmilli-amp(Fan
rotationcontrol)
Dryweight
15kg(33.1lb)
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