Technical data

13773-001
28-40
Page 531 July 2001
(b) Pull ENGINE INSTRUMENTS circuit breaker.
(c) Disconnect battery and insulate both cable ends to prevent accidental connection. (Refer
to 24-30)
(d) De-fuel airplane. (Refer to 12-10)
(e) Remove appropriate access panel(s) (LW3 and LW4, RW3 and RW4, or LW10 and RW10.
(Refer to 6-00)
(f) Identify and disconnect the center wire to the corresponding sensor.
(g) Place multimeter in the 50-ohm scale and zero out the ohmmeter.
CAUTION: If ohmmeter leads come in contact with battery power, the ohmmeter could
become permanently damaged.
(h) Connect black (-) ohmmeter lead to mounting ring. Connect the red (+) positive ohmmeter
lead to the center stud on the sensor. The meter should read approximately 0 ohms resis-
tance when the corresponding sensor is in the empty (down) position and approximately
45 ohms when the corresponding sensor is moved in the full (up) position.
(i) If the sensor fails to indicate the correct resistance values, replace that sensor.
C. Fuel Pressure Switch
(1) Removal - Fuel Pressure Switch
(a) Remove top engine cowling. (Refer to 77-10)
(b) At fuel injector manifold, locate fuel pressure switch and associated wire leads.
(c) Disconnect adel clamps securing bundled wire harnesses to engine.
(d) Remove cable ties and plastic sheath bundling wire harnesses.
(e) Disconnect fuel pressure switch jack J104 located on aft RH side of engine baffling.
(f) Remove adel clamp securing fuel pressure switch to engine standoff.
(g) Unscrew fuel pressure switch from injector manifold fitting, gently de-bundle fuel pressure
switch wire leads from bundled harnesses, and remove fuel pressure switch from airplane.
(2) Installation - Fuel Pressure Switch
(a) Acquire necessary tools, equipment, and supplies.
(b) Apply thin coat of grease to injector manifold fitting.
(c) Install fuel pressure switch to fitting.
(d) Install adel clamp securing fuel pressure switch to engine standoff.
(e) Route switch leads in with bundled harnesses, ensure plastic sheath covers all wires, and
close with cable ties.
(f) Connect fuel pressure switch jack J104 to associated plug.
(g) Install adel clamps securing harness bundle to engine.
(h) Install top engine cowling. (Refer to 71-10)
D. Fuel Flow Gage (Refer to 73-30)
E. Fuel Flow Sensor (Refer to 73-30)
Description P/N or Spec. Supplier Purpose
Fuel Fitting Grease MIL-G-60320 Any Source Lubrication