Checking Generator Brushes - Miller Electric Big Blue 300 Owner's Manual

8-10. Checking Generator Brushes

Notes
OM-4433 Page 42
5/16 in. (8 mm)
Minimum Length
9/16 in. (14.3 mm)
Replace
Damaged Brushes
MATERIAL THICKNESS REFERENCE CHART
!
Stop engine and let cool.
1 Generator Brush With Spring
Mark and disconnect leads at brush hold-
er cap. Remove brushes.
Replace brushes if damaged or if brush
material is at or near minimum length.
New Length
1
24 Gauge (.025 in)
22 Gauge (.031 in)
20 Gauge (.037 in)
18 Gauge (.050 in)
16 Gauge (.063 in)
14 Gauge (.078 in)
1/8 in (.125 in)
3/16 in (.188 in)
1/4 in (.25 in)
5/16 in (.313 in)
3/8 in (.375 in)
1/2 in (.5 in)
Ref 2114 778−D / S−0233−A