Miller Electric OM-4409 - Manual (Page 52)

OM-4409 Page 48
9-6. Adjusting Engine Speed
803 228 / 802 313-A
! Stop engine and let cool.
Engine speed is factory set and
should not require adjustment. Af-
ter tuning engine, check engine no
load speed with a tachometer or fre-
quency meter (see table for no load
speeds). If necessary, adjust speed
as follows:
Start engine and run until warm.
Turn Process/Contactor switch to
Weld Terminals Always On − Stick
position.
1
Throttle Rod
2 Locknut
Loosen locknuts. Place engine
control switch in Run/Idle position.
Wait 15 seconds for throttle sole-
noid to energize and lower engine
speed to idle rpm.
Turn throttle rod to adjust idle
speed. Tighten locknuts.
3
Engine Speed Adjustment
Screw
4 Locknut
Place engine control switch in Run
position.
Loosen locknut. Turn screw to ad-
just weld/power speed. Tighten
locknut.
.
Do not set engine speed higher
than specified.
! Stop engine.
Close door.
2
1
3
4
3/8, 7/16 in
1850 rpm Max.
(61.6 Hz)
1235 rpm
(41.1 Hz)
Tools Needed:
2