OM-4406 Page 46 Return To Table Of Contents
9-6. Adjusting Engine Speed
802 490 / 802 538-A
After tuning engine, check engine
speed with tachometer or frequen-
cy meter. See table for proper no
load speed. If necessary, adjust
speed as follows:
Start engine and run until warm.
On CC models, place Stick/TIG
switch in Stick position.
On CC/CV models, turn Process/
Contactor switch to Stick − Elec-
trode Hot position.
Idle Speed Adjustment
1 Throttle Rod/Plunger
2 Locknut
Loosen locknut. Place Engine Con-
trol switch in Run/Idle 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
position.
Loosen locknut. Turn screw until
engine runs at weld/power speed.
Tighten locknut.
Do not set engine speed higher
than specified.
Stop engine.
1850 rpm max
(61.6 Hz)
1250 rpm
(41.6 Hz)
2
1
4
3
Engine Speed
(No Load)
If necessary, move
linkage to other hole in
bracket or move cotter
pin to other hole in
throttle arm to set idle
speed correctly.