Toro Groundsmaster 4500-D Series - Page 399

Installation(continued)
1
2
3
g276535
Figure269
1.Vise3.Dialindicator
2.Differentialgearcase
5.Securethedifferentialcaseinasoftjawedvise.Positionadialindicatorona
toothofthedifferentialpiniongear.Pressthepinionandsidegearagainst
thedifferentialcaseandmeasurethepiniongeartosidegearbacklash
(Figure269).
PINIONGEARTOSIDEGEARBACKLASH:0.10to0.40mm(0.004to
0.016in)
6.Adjustbacklashbyincreasingorreducingsidegearshimthickness.
Note:Sidegearshimsareavailablein1.10mm(0.043in),1.20mm(0.047
in)and1.30mm(0.051in)thickness.
7.Applygearmarkingcompound,suchasDyKemSteelBluelightlyover
severalgearteeth.
8.Whileapplyingalightloadtoeithersidegear,rotateeitherpiniongearuntil
thesidegearshavemadeonecompleterevolution.
More than 35% total tooth contact
1/3 to 1/2 of entire width
from small end of tooth
g276536
Figure270
9.Idealtoothcontactshouldcovermorethan35%ofeachtoothsurface.The
contactareashouldbeinthecenterofeachtoothandextend1/3to1/2way
acrosseachtoothfromthetoe(small)end(Figure270).
10.Adjustsidegearshimsifnecessarytocorrecttoothcontact.Recheck
differentialpiniongeartosidegearbacklashifanychangesaremade.
11.Afterbacklashandtoothcontacthavebeenadjusted,aligntheholeinthe
differentialpinionshaftwiththeholeinthedifferentialcaseandinstalla
newspringpin.
12.Installdifferentialgearassemblyinrightsideaxlesupporthalf.
Groundsmaster
®
4500-D/4700-D
Page7–41
Axles,PlanetariesandBrakes:ServiceandRepairs
19245SLRevA