5. Sensitivity—If engine tends
to
hunt (alternately
increase
and
decrease speed) under load
con-
ditions, increase sensitivity screw
on
which
the
spring link pivots.
Any change
in the
setting
of
the sensitivity screw
will require correcting
the
speed screw adjust-
ment. Turning
the
sensitivity screw clockwise
causes
a
slight speed increase which
can be
corrected
by
turning
the
speed screw slightly
counterclockwise
to
decrease spring tension.
6. General—Be sure that all lock nuts are tightened
as adjustments are completed. Governors cannot
operate properly
if
there
is any
binding, sticking,
or excessive looseness
in
the connecting linkage
or carburetor throttle assembly.
A
lean fuel
mixture,
or a
cold engine
may
cause hunting.
7. Output—Check
the AC
output voltage.
8. Throttle Stop—With
the
engine stopped,
see
that
the
throttle stop lever screw (attaching
the
override lever, Figure 34) engages the carburetor
throttle stop
pin by 1/4 to 1/2
turn.
This
can be
done
by
backing
off the
screw until
it
just clears
the stop pin, then tuming
in 1/4 to 1/2
turn.
This
provides
1
a
"cracked open" throttle
for
good
starting characteristics.
Do not
adjust
the
screw
so faras to cause the engine to "diesel" and refuse
to stop, thus defeating
the
purpose
of the
anti-
dieseling control.
9. Anti-dieseling control—
a. See that
the
wire linkage
is
securely attached
to
the
solenoid plunger.
Do not
shorten
or
lengthen this connection unless
the
spring
tension
at the
opposite
end
cannot
be
fully
adjusted
by its
stud.
See
Figure
32.
b.
Set the
override stop (located nearer
the
solenoid)
on the
wire linkage
to
about
1/32
inch from
the
slotted override lever
on the
carburetor
so
that
it
does
not
interfere with
wide open throttle when
the
solenoid
is
fully
engaged (plunger all-the-way
in, as
when
engine
is
running).
c. See that anti-dieseling control spring tension
is just enough
to
positively bend governor's
jointed lever
and
hold throttle closed during
stopping.
Spring tension adjusting stud serves
also
to
rotate spring
as
necessary
to
hold
linkage stops horizontally
to
engage flat
against override lever.
d.
Set
no
load stop (setscrew, located nearer the
spring)
on
wire linkage
1/32
inch away from
override lever while
set is
running
at
rated
speed with electrical load removed
(no
load).
Start
and
stop
set to
check adjustment.
Be sure that
all
lock nuts
are
tightened
as
adjustments
are
completed.
CRANKING POSITION
NO LOAD POSITION
THROTTLE PLATE
STOPPED POSITION
SOLENOI^
OVIR^~
RIDE
STOP
PISENGAr.rn.^
_
HT
^-
' ANTI-DIESEL
CONTROL WIRE
LINKAGE
•THROTTLE
PLATE
FIGURE 34. THROTTLE STOP
32
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