CASE CONSTRUCTION CX75C SR - Bringing the Machine up to Operating Temperature

4-OPERATINGINSTRUCTIONS
Bringingthemachineuptooperatingtemperature
NOTICE:Normaloperatingtemperatureofthehydraulicuidisbetween50°C(122.0°F)and80°C(176.0°F),in
themiddleofthetemperatureindicator.
Afterstartingtheengineandbeforeusingthemachine,allowthehydraulicuidtoreachatemperatureof20°C(68.0
°F),asindicatedbytheappearanceofthersttwosegmentsonthehydraulicuidtemperatureindicator.(Referto
page3-14).
Engineautomaticwarm-up
Oncetheenginehasstarted,thewarming-upprocessbeginsautomatically.Atrst,enginespeedisheldatapre-
determined,lowlevel.Asthetemperatureincreases,enginespeedincreasesinproportion.Itispossibletointerrupt
thewarming-upprocessatanytime,simplybymanuallychangingenginespeedorbyoperatingoneofthecontrol
levers.Warming-uptakesapproximately5to10minutes.
Manualenginewarm-up
Withtheenginethrottlebuttonaquarteropen,starttheengineandallowittorunapproximatelyfor5to10minutes.
Whenthecoolanttemperaturereachesthesecondsegment,carryoutthehydraulicuidwarm-upprocedure.
Hydraulicuidwarm-up
1.Turntheenginethrottlebuttontohalf-openposition.Pushthegatelocklever(safetybar)forward.Operatethe
bucketcontrolslowlyuntilthebucketiscompletelyclosed.Operatethearmretractingcontrolslowlyuntilthe
dipperiscompletelyretractedandholdthecontrolinthispositionfor30seconds.Duringthistimethetemperature
ofthehydraulicuidwillincrease.
2.After30seconds,extendthearmcompletelyandholdthecontrolinthispositionafurther30seconds.
3.Continuethearmextendingandretractingprocedureuntilthetemperaturerises(rsttwosegmentsofthetem-
peratureindicator).
4.Operatethetravelandattachmentcontrolsthreeorfourtimestocirculatethehydraulicuid.
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