Staining Or Burning Of Commutator; Checking Commutator Wear; Checking Mica (Undercut) - Kubota D1102-B Workshop Manual

Bad
(a)
( c l B
(d) Mica
C022 P058
(bl
Good
f )
Good
0

Staining or Burning of Commutator

1) Check to see if the comm utator su rface is stained or bu rnt.
2) I f i t is bu rnt, gri nd off with fi ne-g rai n sand pa per.
(1) Sand paper
@

Checking Commutator Wear

1) Check to see if the contact face of the brush is scored.
2) If scored, gri nd off with sand paper or on a l athe.
3) If the com m utator diameter m ust be grou nd to below the
al lowable l im i t, replace it.
Commutator diameter
Model Reference value
D1102-B
D1302-B
D1402-B
V1502-B
V1702-B
V1902-B
8

Checking Mica (Undercut)

1) Check to see the mica unde rcut.
2) I f i t has h igh m ica, rectif y with a saw blade. As the edge
of the segment wil l be rough, chamf er it.
Model Reference value
01102-B 0.5
to
0.0197
01302-B
D1402-B
0.5
V1502-B to
0.0197
V1702·B
V1902-B
92
Allowable limit
32.7 32.5
mm mm
1.2874 in. 1.2795
30.0 mm 29.0 mm
1.1811 1.1417
in.
Mica depth
Allowable limit
0.8
mm
0.315
to in.
0.2 mm
0.0079
0.9
mm
0.0354
to in.
KiSC issued 09, 2007 A
in.
in.
in.