wsm V3307-DI-T-E2B User Manual

S-77
V3307-DI-T-E2B, WSM
ENGINE
Commutator and Mica
1. Check the contact face of the commutator for wear, and grind the
commutator with emery paper if it is slightly worn.
2. Measure the commutator O.D. with an outside micrometer at
several points.
3. If the minimum O.D. is less than the allowable limit, replace the
armature.
4. If the difference of the O.D.’s exceeds the allowable limit, correct
the commutator on a lathe to the factory specification.
5. Measure the mica undercut.
6. If the undercut is less than the allowable limit, correct if with a saw
blade and chamfer the segment edges.
W1075277
Brush Wear
1. If the contact face of the brush is dirty or dusty, clean it with emery
paper.
2. Measure the brush length (A) with vernier calipers.
3. If the length is less than the allowable limit, replace the yoke
assembly and brush holder.
W1075476
Brush Holder
1. Check the continuity across the brush holder and the holder
support with an ohmmeter.
2. If it conducts, replace the brush holder.
W1076066
Commutator O.D.
Factory spec.
32.0 mm
1.26 in.
Allowable limit
31.4 mm
1.24 in.
Mica under cut
Factory spec.
0.50 mm
0.020 in.
Allowable limit
0.20 mm
0.0079 in.
(1) Segment
(2) Depth of Mica
(3) Mica
(a) Good
(b) Bad
Brush length (A)
Factory spec.
18.0 mm
0.709 in.
Allowable limit
11.0 mm
0.433 in.
(A) Brush Length
Resistance
Brush holder –
Holder support
Infinity
KiSC issued 01, 2009 A

wsm V3307-DI-T-E2B Specifications

General

Brand	wsm
Model	V3307-DI-T-E2B
Category	Engine
Language	English