Toro 74020 - Page 62

g336998
Figure82
1.Accessholesfortheventplugs
•ForZT5400Hydros,usea7/16-inchwrench
toaccesstheventplugfromunderneaththe
machine(Figure83).
g336999
Figure83
1.Ventplug
5.Carefullycleantheareaaroundthelter.
Important:Donotallowdirttoenterthe
hydraulicsystem;otherwise,contamination
mayoccur.
6.Placeadrainpanbelowtheltertocatchthe
uidthatdrainswhenthelterandventplugs
areremoved.
7.Removethehydraulic-uidltercoverfromthe
transaxletodraintheuid(Figure84).
g334915
Figure84
1.Hydraulic-lterhousing2.Cover
8.RemovetheO-ringfromtheltercoverand
discardtheO-ring.
9.Afterthehydraulicuiddrainsfromthetransaxle,
removethelterfromthetransaxlehousing.
10.Repeatthisprocedureontheothersideofthe
machine.
InstallingtheHydraulicFluidand
Filters
1.Installanewlterinthetransaxleandanew
O-ringontotheltercover.
2.Installtheltercover.
3.Torquetheltercoverasfollows:
•ZT4400Hydros:22.6to33.8N∙m(200to
300in-lb)
•ZT5400Hydros:54.3to65.5N∙m(480to
580in-lb)
4.Removethecapfromtheexpansiontankandll
thetransaxleswiththespecieduiduntilthe
properuidcapacitiesaremet.
Note:Fillingthetransaxlesmaytakemoretime
thanexpected.
5.Installthepreviouslyremovedventplugsand
torquetheplugsto395to904N∙cm(35to80
in-lb).
6.ProceedtoBleedingtheHydraulicSystem
(page63).
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