OM-492 Page 38
8-8. Adjusting Engine Speed
802 330-B
After tuning engine, check engine
speeds with a tachometer (see table).
If necessary, adjust speeds as follows:
Start engine and run until warm. Turn
V/A control to max.
Adjusting Idle Speed
Idle speed is factory set and normally
does not not require adjustment unless
the governor/injector pump or throttle
solenoid is replaced.
1
Throttle Link
2
Throttle Solenoid Plunger Rod
3
Jam Nut
4
Throttle Arm Stop Screw
Turn Engine Control switch to Run/Idle
position. Loosen jam nut and turn sole-
noid rod clockwise (into throttle link) to
decrease idle speed. Turn rod counter-
clockwise to increase idle speed.
Tighten nut.
Be sure solenoid plunger rod pulls
all the way in “bottoms” when en-
ergized. If plunger rod does not
pull all the way in, readjust rod and
throttle link.
Throttle arm should not contact
stop screw when solenoid is ener-
gized. If necessary, adjust stop
screw to create gap between
throttle arm and stop screw.
Adjusting Weld/Power Speed
5
Throttle Solenoid
6
Weld Speed Jam Nut
7
Adjustment Screw
Turn Engine Control switch to Run
position. Loosen nut and turn screw
counterclockwise to increase speed.
Turn screw clockwise to decrease
speed. Tighten nut.
Using Engine Stop Lever
8
Engine Stop Lever
Use lever to stop engine if Engine Con-
trol switch does not work.
2500 rpm (41.6 Hz)
3750 Max (62.5 Hz)
8
5
6
7
10 mm
Tools Needed:
3
1
2
4
