TM-428 Page 30
Miller Legend
6-15. Replacing Brushes And Cleaning Slip Rings
A. Checking Brushes And Cleaning Slip Rings
ST-800 698-A / Ref. ST-115 942-F / S-0233-A
Stop
engine and allow to cool.
1
Brush Holder Retaining Bar
2 Brush Holder Bracket
Remove brush holder bracket.
Keep
hardware for reinstallation.
3
Brush Holder
4
Brush With Spring
5
Brush Holder Cap
Mark and disconnect leads at
caps, and remove brushes from
bracket.
Replace brushes if damaged, or if
brush
is
at or near minimum length.
6 Slip Rings
Inspect slip rings. Under normal
use,
rings turn dark brown.
If
slip rings are corroded or surface
is uneven, insulate brush leads,
start
engine,
and clean rings with a
commutator stone. Remove as
little
material as possible. Stop en
-
gine.
Install brushes, bracket, and re-
maining generator parts. Adjust
brushes
as shown in Section B.
Reinstall both side panels and top
cover.
Tools
Needed:
1/2 in
5/16 in. (8 mm)
Minimum Length
9/16 in. (14.3 mm)
New Length
Replace
Damaged Brushes
2
1
4
3
5
