Case CX300C - Bleeding air from the hydraulic components

6-MAINTENANCE
Bleedingairfromthehydrauliccomponents
NOTE:Afterbleedingairfromthecomponents,stopthe
engineforveminutesandchecktherearenobubblesat
thesurfaceofthehydraulicuidinthereservoir.
Hydraulicpump
•
Usingasolvent,cleantheperipheryoftheairbleed
plug.Loosentheairbleedplug,removetheplugifthe
uiddoesnotow.
•
Fillthepumpwithnewcleanhydraulicuid.Installand
tightentheairbleedplug.
•
Starttheengineandrunitatlowidlespeed.Loosen
theairbleedplugonthepump.Tightentheplugwhen
airfreeuidcomesoutofthebleedplughole.Clean
theareacompletely.
8B4G1U-00514
Swingmotor
•
Starttheengineandrunitatlowidlespeed.Loosen
thedrainportandmakesurehydraulicuidrunsout.If
necessary,stoptheengineandaddoilviadrainport.
Plugthedrainportwithouttightening,thenstarttheen-
gineandrunitatlowidlespeed,leavingittorununtiloil
beginstorunfromtheorice.Tightentheairbleedplug
completely.Swingtheupperstructureatleasttwice
completelytotherightandtwicecompletelytotheleft.
•
Aftercompletebleeding,stoptheengineforvemin-
utesthencheckthattherearenoairbubblesinthehy-
draulicreservoir.
K8R7P9-003A15
Attachmentcylinders
•
Starttheengineandrunitatlowidlespeed.Extendand
retracttheattachmentcylinderrodsfourorvetimes
withoutbringingthemtoendofstroke.Thenrepeat
theoperationthreeorfourtimes,thistimebringingthe
cylinderrodstoendofstroke.
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