Toro TX525 - Page 232

ENGINE
4-179TX525 Service Manual Rev. 000
 Lever(Fig.0756): a. Checkthecommutatorbarforwear.Polishthe
commutatorwithveryneemerypaperifitis
slightlyworn(micaundercutmustbethoroughly
cleanedofemerydust).
b. MeasurethecommutatorODwithanoutside
micrometeratseveralpoints.
c. IftheminimumODislessthattheallowablelimit
of1.142”(29.0mm),replacethearmature.
d. IfthedifferenceoftheODsexceedstheallow-
ablelimitof.0020”(.05mm),correctthecum-
mutatoronalathetothefactoryspecicationof
.0008”(.02mm).
e. Measurethemicaundercut.
f. Iftheundercutislessthantheallowablelimitof
.0079”(.20mm),correctitwithasawbladeand
chamfertheedges.
Factory Spec. Allowable Limit
Commutator
OD
1.181”(30.0mm) 1.142”(29.0mm)
Difference of
ODs
.0008”(.02mm) .0020”(.05mm)
Mica undercut .0197”to.0315”
(.50to.80mm)
.0079”(.20mm)
28. Testtheeldcoil,brushholder,armaturecoil,brush
wear.Referto“StarterAssemblyTesting”onpage
4-188.
A. CommutatorOD B. Micaundercut
Fig 0756 PICT-8102a
27. Inspectthearmaturecommutatorandmica(Fig.
0757):
Fig 0757 PICT-8077
B
A