TM-428 Page 7
Miller Legend
SECTION 3 – OPERATING WELDING GENERATOR
3-1. Front Panel Controls
Ref. ST-168 046
4
2
1 Engine
Control Switch S2
Use switch to start engine, select speed,
and stop engine. In Run/Idle position, en-
gine
runs at power/idle rpm at no load, and
weld/power
rpm under weld or 100 Hz auxil
-
iary
power receptacle load. In Run
position,
engine
runs at weld rpm.
2
Idle Lock Switch S1
Use switch to lock engine at power/idle
speed (see Table). In Unlock position, En-
gine Control switch and optional Remote
Control
switch determine engine speed.
3
Engine Choke Control
Use control to change engine air-fuel mix.
To Start: pull out choke and turn Engine
Control switch to Start position. Release
switch and slowly push choke in when en-
gine starts. Do not crank engine while fly-
wheel
is turning.
To Stop: turn Engine Control switch to Off
position.
4 Remote
Control Switch S4
Use switch to select front panel or remote
amperage
control (see Section 3-2).
5
Ampere Ranges Switch S5
Use
switch to select weld amperage range.
.
For best arc starts, use lowest amper-
age
range possible.
6
Fine Amperage Control R1
Use
control to select
weld amperage within
the range selected by the Ampere Ranges
switch.
Control
may be adjusted while weld
-
ing.
Scale is
for reference only
. W
eld output
would be 88 A DC with control settings as
shown
(50% of 70 to 105 A).
7
Engine Hour Meter HM
15
Using Idle Lock Switch
RUN/IDLE
LOCK
UNLOCK
1860 rpm
RUN/IDLE
OR
RUN
LOCKUNLOCK
(Power/Idle)
1860 rpm
(Power/Idle)
No Load:
3000 rpm
Load:
3000 rpm
(Weld)
6 7
3
(Weld)
