Adjusting Engine Speed On Models With Automatic Idle (Optional) - Miller PRO 300 Owner's Manual

8-8. Adjusting Engine Speed On Models With Automatic Idle (Optional)

OM-4422 Page 40
Engine Speed
1880 rpm max
(62.6 Hz)
1250 rpm
(41.6 Hz)
3
2
1
After tuning engine, check engine speed
with tachometer or frequency meter. See
(No Load)
table for proper no load speed. If neces-
sary, adjust speed as follows:
Start engine and run until warm.
Turn Process/Contactor switch to Stick −
Weld Terminals Always On position.
Idle Speed Adjustment
1 Throttle Rod/Plunger
2 Locknut
Loosen locknut. Place Engine Control
switch in Auto position.
Turn throttle rod and plunger until engine
runs at idle speed. Tighten locknut.
.
Be sure solenoid plunger pulls all the
way in ("bottoms") when energized.
.
If necessary, move linkage to other
hole in bracket or move cotter pin to
other hole in throttle arm to set idle
speed correctly.
Weld/Power Speed Adjustment
3 Engine Weld/Power Speed
Adjustment Screw
4 Locknut
Place Engine Control switch in Run posi-
tion.
Loosen locknut. Turn screw until engine
runs at weld/power speed. Tighten lock-
nut.
.
Do not set engine speed higher than
specified.
Y Stop engine.
4
If necessary, move
linkage to other hole in
bracket or move cotter
pin to other hole in
throttle arm to set idle
speed correctly.
Tools Needed:
803 563