SECTION 4 − MAINTENANCE AND TROUBLESHOOTING

4-1. Routine Maintenance

Y Disconnect power before maintaining.

n = Check

Z = Change

~ = Clean

l = Replace

Reference

* To be done by Factory Authorized Service Agent

 

 

Every

l Unreadable Labels

~ Weld Terminals

nl Weld Cables

l Cracked Parts

3

Months

 

 

 

 

 

n Gun Cable

n Gas Hose And Fittings

 

 

Every

 

 

 

 

6

 

 

 

 

Months

Or

 

 

 

 

~ Inside Of Unit

~ Drive Rolls

 

 

4-2. Brush Inspection And Replacement

1 Motor

2 Brush Cap Remove brush cap.

3 Brush

Replace brush if it becomes chipped or broken, or if less than 1/4 in (6.4 mm) of brush material is left. Do not include spring boss as part of the 1/4 in measurement.

Install brush so that curved surface on end of brush matches curve of motor, and secure with cap.

3

Repeat procedure for other brush.

1

2

1/4 in (6 mm) Minimum Length

5/8 in (16 mm) New Length

Tools Needed:

Replace

Damaged

 

 

Brushes

Ref. 137 390-C / S-0816

OM-227 674 Page 17

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Miller Electric AA40GBU manual Routine Maintenance, Brush Inspection And Replacement, Disconnect power before maintaining