Piper SARATOGA PA-32-301 Maintenance Manual page 308

PIPER AIRCRAFT
PA-32-301/301T
MAINTENANCE MANUAL
INDICATING.
FUEL QUANTITY SENDER UNIT.
- NOTE -
Inboard and outboard fuel tanks in each wing are interconnected
and have a total capacity of 53.5 gallons. Fuel quantity sender units
mounted in each fuel tank transmit electrically the cumulative
quantity of fuel in each set of tanks, tofuel quantity gauges mounted
in the instrument panel.
Fuel quantity sender units and fuel quantity gauges can be checked while mounted in the airplane by using
the following procedure:
1. 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. Chapter 12.)
2. Level airplane laterally (refer to Leveling. Chapter 8) and position the aircraft with a I degree nose up
attitude.
-NOTE-
The electrical system should supply 12 to 14-volts to the gauge.
3. With the master switch in the "OFF" position. the gauge needle should be centered on the white dot to
the left of the "0" radial mark. with a maximum deviation of 1/4 needle width. If not within this tolerance. the
gauge should be replaced.
4. 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.
5. Place 2.5 gallons of fuel in the wing fuel tank that relates to the gauge and sender unit being checked.
6. With 12 to 14-volts DC supplied to the electrical system and the master switch in the "ON" position.
the needle should be centered on the "0" radial mark: plus O. minus 1 needle. width.
7. If the needle does not read within the above tolerance. remove the sender wire from the rear of the
gauge and check the resistance to ground through the sender circuit. If the resistance is not within 5 I ohms.
replace the inboard sender. Then. recheck as specified above.
8. Add fuel to the tanks in accordance with the information given in Chart 2802 until tanks are full.
Observe the gauge reading at each 10 gallon increment.
9. With the tanks full and master switch "ON," the needle should be centered on the "F' radial mark
within 1 needle width. If not within this tolerance, adjust the electrical adjustment (refer to Figure 28-6)just
sufficiently to bring it within tolerance; do not center the needle.
28-41-01
Page 28-20
Revised: August 11. 1983
2B15