Piper Cherokee LANCE, Service Manual

Page: 466 / 854

PIPER CHEROKEE SIX / LANCE SERVICE MANUAL
VIII - FUEL SYSTEM 03/27/08
2J6
8-15. FUEL QUANTITY SENDER UNIT ( PA-32R-300 and 32-300 with S/N’s 32-7940001 and up ).
NOTE: Inboard and outboard fuel tanks in each wing are interconnected and have a total capacity of 49
gallons. Fuel quantity sender units mounted in each fuel tank transmit electrically the
cumulative quantity of fuel in each set of tanks, to fuel quantity gauges mounted in the
instrument panel.
8-16. FUEL QUANTITY SENDER/GAUGE CHECK (INSTALLED) ( PA-32R-300 and those 32-300’s
above S/N’s 32-7940001 ). Fuel quantity sender units and fuel quantity gauges can be checked while
mounted in the airplane by using the following procedure:
a. Put the fuel selector levers in the “OFF” position. Completely drain fuel tanks that relate to the fuel
quantity senders and gauge to be checked. (Refer to Draining Fuel System, Section II.)
b. Level airplane laterally (refer to Leveling, Section II) and position the aircraft with a 1 degree nose
up attitude.
NOTE: The electrical system should supply 12 to 14volts to the gauge.
c. With the master switch in the “OFF” position, the gauge needle should be centered on the white dot
to the left of the “O” radial mark, with a maximum deviation of 1/4 needle width. If not within this
tolerance, the gauge should be replaced.
d. With the master switch in the “ON” position and no fuel in the tanks, the gauge needle should be
centered on the white dot to the left of the “O” radial mark with a maximum deviation of 1/4 needle
width. If not within this tolerance, the gauge should be replaced.
Figure 8-3b. Fuel Quantity Sender Unit (P/N 548-671) Adjustment