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OM-4422 Page 40
8-8. Adjusting Engine Speed On Models With Automatic Idle (Optional)
803 563
1880 rpm max
(62.6 Hz)
1250 rpm
(41.6 Hz)
Engine Speed
(No Load)
After tuning engine, check engine speed
with tachometer or frequency meter. See
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.
Stop engine.
2
1
4
3
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: