Toro Groundsmaster 5900 Series - Page 196

Piston(Traction)PumpRemoval(Figure87)(continued)
12.Ifhydraulicttingsaretoberemovedfrompistonpump,marktting
orientationtoallowcorrectassembly.Removettingsfrompumpanddiscard
O−rings.
Piston(Traction)PumpInstallation(Figure87)
1.Ifttingswereremovedfrompistonpump,lubricateandplacenewO−rings
ontottings.Installttingsintopumpopeningsusingmarksmadeduringthe
removalprocesstoproperlyorientatettings.Tightenttings(seeInstalling
theHydraulicFittings(SAEStraightThreadO-RingFittings)(page5–9)).
2.Attachhoisttopistonpumptosupportpumpandalsotoallowsafeinstallation
ofpumpintomachine.
3.Applyantiseizelubricanttointernalsplinesofpumpcouplerandexternal
splinesofpumpshaft.
IMPORTANT
Topreventspringcouplerdamage,makesurethatpistonpumpis
properlysupportedanddoesnotputsideloadoncouplerduring
pumpinstallation.
4.Carefullyraisepistonpumpintothemachine,alignpumpinputshafttospring
coupleronengineandpositionittotheengineywheelplate.Supportpump
topreventitfromproducinganysideloadintocouplerandalsotoalignpilot
diameterofpumptoywheelplatebore.
5.Whilemaintainingpumpalignmentwithspringcouplerandywheelplate,
applymediumstrengththreadlockerandinstallfour(4)capscrewsand
washerstosecurepistonpumptoywheelcoverplate.Tightencapscrews
from115to120N·m(85to89ft−lb).
6.Installgearpumptopistonpump(seeGearPump(page5–86)).
2 1
g287907
Figure89
1.Piston(traction)pump
2.Pistonpumpchargereturn
7.Fillpiston(traction)pumphousingwith2.1L(0.55gal)ofnewhydraulic
oilthroughthechargereturn(90obarbedtting)atthetopofthepump
(Figure89).Thiswillensurethatinternalpumpcomponentshaveadequate
lubricationduringinitialoperation.
HydraulicSystem:ServiceandRepairs
Page5–96
Groundsmaster
®
5900&5910
16227SLRevB