Inspecting Brushes, Replacing Brushes, And Cleaning Slip Rings - JLG 600SC Service And Maintenance Manual

Inspecting Brushes, Replacing Brushes, and
Cleaning Slip Rings
INSPECTING BRUSH POSITION
Inspect brush alignment with slip rings. View alignment
through air vents in stator barrel. Brushes must ride com-
pletely on slip rings.
INSPECTING BRUSHES
1. Remove end panel. Inspect wires.
2. Remove brush holder assembly. Pull brushes from hold-
ers.
1. Brush Holder Assembly
2. Brushes
3. Slip Rings
Figure 3-41. Inspecting Generator Brushes, Replacing Brushes, and Cleaning Slip Rings
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Brush Position on Slip Rings
2
3
Acceptable
Unacceptable
Note: Brushes must ride completely on slip rings.
1
1/4 in (6 mm)
or Less - Replace
7/16 in - 1/2 in
2
(11 - 12 mm ) New
SECTION 3 - CHASSIS & TURNTABLE
3. Replace brushes if damaged, or if brush is at or near min-
imum length.
CLEANING SLIP RINGS
1. Visually inspect the slip rings. Under normal use, the
rings turn dark brown.
2. If slip rings are corroded or their surface is uneven,
remove belt to turn shaft by hand for cleaning.
3. Clean rings with 220 grit emery paper. Remove as little
material as possible. If rings are deeply pitted and do not
clean up, consult generator factory service.
4. Reinstall belt, brush holder assembly, and end panel.
3
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