Piper Cherokee Six 300 Information Manual page 13

C H ER OK EE S I X. 3 O O
The constant speed propeller is a Hartzell HC-C2YK- I ( )F/ F8475D-4 with a diameter of 80
inches. The propeller is controlled by a governor mounted at the left forward side of the crankcase .
The governor is operated by a cable from the power control quadrant.
The power control quadrant located in the lower center of the instrument panel includes
throttle, mixture. and propeller controls. A friction lock on the right side of the quadrant prevents
creeping of the controls. In addition. the mixture control has a lock* to prevent activation of the
mixture control instead of the pitch control. For information on the leaning procedure, see the
Avco-Lycoming Operator's Manual.
INDUCTION SYSTEM
On Serial Numbers 74y',0001 through 7540188, the Induction Air for the engine enters an
opening in the nose cowl below the propeller and is picked up by a large air duct. The air is directed
through a filter and on to the servo regulator. Should the filter become blocked, a springJoaded
door in the air box between the lilter and the servo regulator opens automatically. The door may
also be opened manually by a control located on the right side of the quadrant.
,,: Qn Serial Numbers 764000 | and up, an induction scoop is located on the left side of the lower
cbwl. An intake air box is attached to the inside of the cowl adjacent to the air filter box. The filter
box is located at the aft end of the induction scoop. Access to the filter is gained through a
detachable plate located on the outside of the lower cowl. The intake air box incorporates a
manually operated two-way valve designed to allow induction air either to pass through the filter or
to bypass the filter and supply heated air directly to the engine.
Alternate air selection insures induction air flow should the filter become blocked. Since the air
is heated, the alternate air system offers protection against induction system blockage caused by
snow or freezing rain, or by the freezing of moisture accumulated in the induction air filter.
Alternate air is unfiltered; therefore, it should not be used during ground operation when dust or
other contaminants might enter the system. The primary (through the filter) induction source
should always be used for takeoffs. On serial numbers 7640001 and up, the control is operated by
pressing the knob to the left to clear the retaining gate and then moved in the desired direction.
The Bendix RSA-lOED I type fuel injection system consists of a servo regulator which meters
fuel flow in proportion to airflow to the engine, giving the proper fuel-air mixture at all engine
speeds, and a fuel flow divider which receives the metered fuel and accurately divides the fuel flow
among the individual cylinder fuel nozzles.
A combination fuel flow indicator and manifold pressure gauge is installed in the left side of the
instrument panel. The fuel flow indicator is connected to the fuel flow divider and monitors fuel
pressure. The instrument converts fuel pressure to an accurate indication of fuel flow in gallons per
hour and percentage of cruise power.
fSerial nos. 7540001 and up
AIRPLANE AND SYSTEMS
REYISED: JULY 17.l97S
2-2