Brush Wear; Brush Holder - Nanni N4.40 Workshop Manual

03-M-E3B, 03-M-DI-E3B, 03-M-E3BG, WSM
(Continued)
Factory
spec.
Mica undercut
Allowable limit
(1) Segment
(2) Depth of Mica
(3) Mica

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 a vernier caliper.
3. If the length is less than the allowable limit, replace the yoke
assembly and brush holder assembly.
Factory spec.
Brush length (A)
Allowable
limit

Brush Holder

1. Examine the continuity across the brush holder and the holder
support with a circuit tester.
2. If electricity flows, replace the brush holder assembly.
1-S101
D1503-M,
D1703-M,
D1803-M,
V2003-M,
V2203-M,
V2403-M,
V2403-M-T, 0.45 to 0.75 mm
D1803-M-DI, 0.018 to 0.029 in.
V2403-M-DI,
V2403-M-DI-T,
D1703-M-BG,
V2003-M-BG,
V2003-M-T-BG,
V2203-M-BG
0.55 to 0.85 mm
V2403-M-BG
0.022 to 0.033 in.
0.20 mm
0.0079 in.
(a) Correct
(b) Incorrect
M00000003ENS0148US1
15.0 mm
0.591 in.
D1503-M,
D1703-M,
V2003-M,
V2203-M,
11.0 mm
D1803-M-DI,
0.433 in.
D1703-M-BG,
V2003-M-BG,
V2003-M-T-BG,
V2203-M-BG
D1803-M,
V2403-M,
9.0 mm
V2403-M-T,
0.35 in.
V2403-M-DI,
V2403-M-DI-T
12.0 mm
V2403-M-BG
0.472 in.
M00000003ENS0149US1
M00000003ENS0150US1
KiSC issued 06, 2009 A
ENGINE