Case CX490D - Page 265

6-MAINTENANCE
7.Openthelowerpanel(1)belowthehydraulictankto
accessthedrainplug.
8.Placeacontainerofasuitablecapacityunderthedrain
plug.
9.Opentheplugtodraintheremaininghydraulicuid.
10.Replacethesuctionlterasdescribedonpage6-59.
11.Replacethereturnlterasdescribedonpage6-60.
12.ReplacetheO-ringandclosethedrainplug.Lockthe
lowerpanelbelowthehydraulictank.
13.Addnewhydraulicoiltothetank.
14.ReplacetheO-ring,andattachthecoverofthehy-
draulicoilsuctionlter.
15.Starttheengine,andrunitwithnoloadforabout
5min.
16.Moveeachcontrolseveraltimestoremoveallairfrom
thesystem.
17.Swingtheupperstructureallthewayfromlefttoright
equallytwiceormore.
18.Parkthemachineatthespeciedposition,andthen
stoptheengine.
19.Checktheoillevelofthehydraulictank,rellitwithoil
asnecessary.Checkthattherearenobubblesinthe
hydraulictank.
SMIL19CEX1997AA2
SMIL15CEXY550AA3
Bleedingairfromthehydrauliccomponents
NOTE:Afterbleedingairfromthecomponents,stopthe
engineforveminutesandchecktherearenobubblesat
thesurfaceofthehydraulicuidinthereservoir.
6-71