Miller Electric Big Blue 600D manual Adjusting Engine Speed, Overload Protection

7-5. Adjusting Engine Speed

Engine Speed

Weld/Power

2

1

RPM

1850

YStop engine.

Engine speeds have been factory set and should not require adjust- ment. After tuning engine, check engine speeds with a tachometer. See table for proper no load speeds. If necessary, adjust speeds as follows:

1Speed Adjustment Screw

2Locknut

Loosen nut. Start engine.

Turn screw until engine runs at weld/power speed. Tighten locknut.

YStop engine.

Close side door.

Tools Needed:

9/16, 7/8 in

Ref. ST-134 730-C / Ref. SD-131 784-A

7-6. Overload Protection

1

4

2

OFF

RUN

START

3

YStop engine.

.When a fuse or circuit breaker opens, it usually indicates a more serious problem exists. Contact a Factory Authorized Service Agent.

1 Circuit Breaker CB3

CB3 protects the 115 volts ac out- put to Remote 14 receptacle RC3 or terminal strip 3T. If CB3 opens, the 115 volts ac output stops.

2 Circuit Breaker CB4

CB4 protects the 24 volts ac output to Remote 14 receptacle RC3 or terminal strip 3T. If CB4 opens, the 24 volts ac stops.

Press button to reset breaker.

3Fuse F (See Parts List)

4Fuse F6 (See Parts List)

Remove screw to open upper front panel access door.

Fuse F protects the magnetic shut- down switch MS1 from damage due to overload. If F opens, the engine stops. Do not run engine until problem is corrected.

Check fuse, and replace if open.

Fuse F6 protects the excitation cir- cuit from damage due to overload. If F6 opens, there will be low/no weld and generator power output.

Check fuse, and replace if open.

Tools Needed:

3/8, 1/2 in

Ref. 184 780 / Ref. ST-174 733 / ST-156 468