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Technical Feature
At
low
engine speeds, the valves are kept in the
fully
closed
< CLOSEO>
position by the governor spring
;
the centrifugal weights (steel
LINKAGE
balls) remain -close to the governor shaft so
there
is no force
(t)
DRIVE
SHAFT
applied to
the
linkage between the governor and drive shaft.
As the engine speed is increased.
the
centrifugal weights
move outward against the
governor. The
governor moves out-
ward (toward
the right
crankcase cover) and applies force on
the pinion, which in turn pulls down the drive shalt lever
linkage.
As the drive shaft lever linkage
moves,
it also allows
the
valve
levers to turn, which in turn moves
the
exhaust valves.
At the
highest
engine
speeds,
the
weights move
to
their
fur-
thest extreme and
the
exhaust valves
are
fully open.
NOTE
•
This H.P.P. valve is
a
self
adjusting
type.
16-2
131
i-~~~=3~
VALVE
lEVER
I
1'(--vALVE
ROO
(6)
EXHAUST
(5)
PIIIN[(lN·.c:':==-A
VALVES
(7)
I
(8)
GOVERNOR
SPRING
WEIGHT
(STEEL
BALl!
< OPEN>
(1)
DRIVE SHAFT
(5)
EXHAUST
VALVES
(4) GOVERNOR
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