Miller Electric Big Blue 600D - Manual (Page 29)

OM-481 Page 25
7-5. Adjusting Engine Speed
Y Stop 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:
1 Speed Adjustment Screw
2 Locknut
Loosen nut. Start engine.
Turn screw until engine runs at
weld/power speed. Tighten locknut.
Y Stop engine.
Close side door.
Ref. ST-134 730-C / Ref. SD-131 784-A
1
2
Tools Needed:
9/16, 7/8 in
Engine Speed
Weld/Power
RPM
1850
7-6. Overload Protection
Ref. 184 780 / Ref. ST-174 733 / ST-156 468
Y Stop 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.
3 Fuse F (See Parts List)
4 Fuse 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
1
2
OFF
START
RUN
3
4