Piper Navajo PA-31 Service Manual page 626

PIPER NAVAJO SERVICE MANUAL
9-58. REMOVAL AND INSTALLATION
OF FUEL BOOST PUMP WARNING
SENSOR. Removal is accomplished by the following:
a. Remove the lower wing fillet access plate.
b. Disconnect the electric connections.
c. Remove the retaining clip.
d. Unscrew pressure switch from the elbow fitting and remove; catch spillage.
e. Installation of the switch is the reverse of steps a through c.
9-59. ADJUSTMENT OF FUEL BOOST PUMP WARNING SENSOR. The pressure switch
has been adjusted to 2-4 PSIG by the manufacturer. Replace the switch if it is found to be
defective.
9-60. REMOVAL, INSTALLATION AND ADJUSTMENT OF FUEL FLOW WARNING
CIRCUIT GATED DELAY RELAY. Removal is accomplished by the following:
a. Remove the instrument access plate.
b. Unplug the electrical connector.
c. Unbolt the relay from the bracket and remove.
d. Installation is the reverse order of steps a through c.
e. There is no adjustment for this unit; replace if defective.
NOTE
Extreme care should be exercised when handling the relay to
insure that the white wire does not become grounded which
will ruin the solid state unit.
9-61. REMOVAL, INSTALLATION AND ADJUSTMENT OF THE FUEL FLOW SENSOR
PROBE. Removal is accomplished by the following:
a. Remove the cover plate aft of the fuel quantity sender.
b. Disconnect the electric wires and remove bolts.
c. Remove sensor probe from cell.
d. Installation is the reverse order of steps a through c.
e. There is no adjustment of the switch; replace if defective.
9-62. REMOVAL AND INSTALLATION OF WARNING INDICATOR LAMPS. Each
individual warning indicator has a spring-loaded mechanism which allows easy access to the
lamps. A small release located on the inboard side of the indicator, when pushed, allows the
indicator to pop out and to swing outboard, exposing the lamps. The lamps can then be
pulled out of the back of the indicator and new ones inserted. To close, push indicator back
into original position until it latches.
9-63.
REMOVAL AND INSTALLATION OF WARNING INDICATOR
HOUSING. Removal is accomplished by the following:
a. Remove the two screws on each side of the housing.
b. Pull housing out far enough to disconnect connector E322 and remove.
c. Installation is the reverse order of steps a and b.
Reissued:
10/12/79
~FUEL SYSTEM
Reissued: 10/12/79
3C10