Miller 819A Technisches Handbuch - Seite 21
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8-8. Inspecting Brushes, Replacing Brushes, And Cleaning Slip Rings
Acceptable
2
Tools Needed:
Belt Driven Generator
Brush Position On Slip Rings
2
3
.
Brushes must ride
completely on slip
rings
1
1/4 in (6 mm)
Or Less − Replace
7/16 in − 1/2 in
(11 − 12 mm) New
Unacceptable
!
Stop generator.
1
Brush Holder Assembly
2
Brushes
3
Slip Rings
Inspecting Brush Position
Inspect brush alignment with slip
rings.
View
brush
alignment
through air vents in stator barrel.
Brushes must ride completely on
slip rings.
Inspecting Brushes
Remove end panel. Inspect wires.
Remove brush holder assembly.
Pull brushes from holders.
Replace brushes if damaged, or if
brush is at or near minimum length.
Cleaning Slip Rings
Visually inspect slip rings. Under
normal use, rings turn dark brown.
If slip rings are corroded or surface
is uneven, remove belt to turn shaft
by hand for cleaning.
Clean rings with 220 grit emory pa-
per. Remove as little material as
possible. If rings are deeply pitted
and do not clean up, consult gener-
ator factory service.
Reinstall belt, brush holder assem-
bly, and end panel.
3
803 275-A
TM-268 819 Page 19