Toro Dingo TX 525, Руководство по обслуживанию

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ENGINE
4-179 TX525 Service Manual Rev. 000
Lever (Fig. 0756): a. Check the commutator bar for wear. Polish the
commutator with very fine 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 specification 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 field 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