6-2
FIGURE 6-2. ADJUSTING GOVERNOR
FS1778
TURN TO
INCREASE RPM
(Hold spring stud in
position)
SPEED
ADJUSTING
NUT
GOVERNOR
SPRING STUD
(SENSITIVITY
ADJUSTMENT)
TURN FOR
MINIMUM SPEED
DROP, THEN
ADJUST SPEED
CUT
GOVERNOR
ARM
SENSITIVITY
ADJUSTING
RATCHET
DECREASE
SENSITIVITY
GOVERNOR
SPRING
INCREASE
SENSITIVITY
GOVERNOR
STUD
DECREASE
SPEED
INCREASE
SPEED
SPEED
ADJUSTING
NUT
CHARGE RATE ADJUSTMENT
The adjustable resistor slide tap (Figure 6-3) in the
charging circuit is set to produce a 2 ampere charging
rate. This resistor is found in the generator air outlet. For
applications requiring frequent starts, check the battery
specific gravity periodically. If necessary, increase the
charging rate slightly (move the slide tap up). Adjust this
slide tap only when the engine is stopped.
FIGURE 6-3. CHARGING RESISTOR
ES1971C
COOLING AIR OUTLET
CHARGING RESISTOR
Batteries present the hazard of explo-
sion, which can result in severe personal injury. Be-
cause batteries produce explosive gas, do not
smoke or allow any flame, sparks, or arc-producing
devices in the battery area.
Avoid overcharging the battery. Make small increments
of change until the proper rate has been determined to
keep the battery charged.
VALVE CLEARANCE ADJUSTMENTS
Check the valve clearance when the engine is at room
temperature, about 70
°
F (21
°
C).
Incorrect valve clearance adjustment
can lead to irrevocable damage to the generator set.
Make certain that only qualified personnel perform
this adjustment.
1. Turn the flywheel until the cylinder which is to have
its valve adjusted is on its compression stroke. On
engines without a hand crank, use a socket wrench
on the flywheel hex head screw.
To determine if the cylinder is in its compression
stroke, observe the push rods as the engine is ro-
tated in a clockwise direction. The exhaust valve
push rod will be in its lowest position, and the intake
valve push rod will be moving downward. As the
