Miller Big Blue 450 Duo CST, Owner'S Manual

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Complete Parts List is available at www.MillerWelds.com
OM-266621 Page 38
8-5. Battery Maintenance
Lead acid batteries discharged when stored in any temperature. Units that are stored should have the battery recharged every three months and before
being put into service. To preserve optimum battery performance and life, recharge battery in storage when the open
− circuit voltage drops to 12.4 volts
DC when measured across the battery terminals.
8-6. Checking Generator Brushes
GenBrush2 2014-10 / Ref 205 725
!
Stop engine and let cool.
1 Generator Brush Assembly
Mark and disconnect leads at brush hold-
er assembly. Remove assembly. Press
on brush to be sure springs compress.
Replace assembly if brushes are dam-
aged or if brush material is at or near mini-
mum length. Check length from brush-
holder surface.
1
Minimum Length:
New Length:
Replace Assembly if
Brushes are Damaged
1/4 in. (6.5mm)
5/8 in. (16mm)
1
8-7. Inspecting And Cleaning Spark Arrestor Muffler
907 427-2
!
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.
Tools Needed:
3/8 in.
3
1
2