Checking Generator Brush Assembly; Inspecting And Cleaning Optional Spark Arrestor Muffler - Miller Big Blue 450 Duo CST Owner's Manual

8-6.

Checking Generator Brush Assembly

Stop engine and let cool.
1 Generator Brush Assembly
2 Minimum Length: 1/4 in. (6.5 mm)
3 New Length: 5/8 in. (16 mm)
8-7.

Inspecting And Cleaning Optional Spark Arrestor Muffler

3
1
2
3/8 in.
wrench
crescent wrench
�
Complete Parts List is available at www.MillerWelds.com
1
4
3
2
4 Damaged Brush
Mark and disconnect leads at brushholder
assembly. Remove assembly. Press on
brush to be sure springs compress.
Complete Parts List is available at www.MillerWelds.com
minimum length. Check length from
brushholder surface.
1
Replace assembly if brushes are damaged
or if brush material is at or near minimum
length. Check length from brushholder
surface.
Stop engine and let cool.
1 Spark Arrestor Muffler
2 Cleanout Plug
Remove plug and remove any dirt covering
cleanout hole.
3 Exhaust Pipe
Start engine and run at idle speed to blow
out cleanout hole. If nothing blows out of
hole, briefly cover end of exhaust pipe with
fireproof material.
Stop engine and let cool.
Reinstall cleanout plug.
1
Ref 205725
OM-255 254 Page 1
OM-266621 Page 43