ADJUSTMENTS
naLsprtng
tension.
If
there
isadrop.
in
the frequency,
increase
the,
booster
Internal
spring
tension. To
increase
the
tension,
pullout
on
the
spring
bracket,
and move the pIn
to
a
different
hole.
With
the
,booster disconnected, a maximum drop
of
3.
cycles
from
no load
to,£un load
is
normal.
With
the
booster in operation a maximum IN
...
C~E,ASE
of 2
cycles
from
no load
to
full load
is
normal.
A drop of 1 '
,cycle
at
1/4
load
is
permissible,
giving an over
all
spread
of
3
cycles,
ma:ximum. '
.
The.effectofthe
booster
is
limited by
the
,
general
condition
of
the
engine.
The
booster
can not compensate for a
loss
in engine vacuum caused by
leaky valves,
wornpiston
rings,
etc,
The,
..
boosterrequires
little
maintenance
other
than using a fine,
wire
to
clean
the
small
hole in
the
short
Vacuum tube which
fits
into
the
hole
in
.
thetop.of
the
engine intake manifold.
Do
not
enlarge
this
hole.
If
there'
is'tensicm on
the'
external
spring, when the plant is' operating
at
no
load
or
light
load,it
maybe
due
to
improper
adjustment;
restrictedho},ein
the
small
vacuum
tube,
or
a
leak
in
the
booster
diaphragm
or
gasket.
'.
'
'-
.:,\".,.::-,
,'._.'..;,;,
OILPRESSURERELIEF
VALVE ADJUSTMENT. -
Th~r()UPtessur,e
of
the,
plalltcallbe
.
easily adjusted by means 'of
the
slotted stud and
locknutlonaied
just
be-
low
the
governor Unkage,
as
illustrated,
Oil
pressure
reading when
the
'"
plantlsthoroughlywarmedupisfrom
25
to
40
pounds. To
increase'
,
oil
pressure;"loosen
the
locknut and
turn
the
stud in. To
decrease
oil
pressure,
loosen
the
,locknut and
turn
the
stud out. Be
sure
to
tighten,
the,Jockmitsecu:re~y
after, making
art
adjustment.
Lo~oiLpres:sure
may point
to
worn
or
poorly adjusted
main
or
con-
neclingrodbearlngs,a
weak
or
broken
by-pass
spring,
a defective
gauge
or
a poor adjustment. Check
the
oil
pressure
gauge
before
mak-,
ingany
other
test,
it
may be
defective.
FIG.SS
-OIL
PRESSURE
RELIEF
VALVE ADJUSTMENT
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