Removal Of Computer Assembly; Installation Of Computer Assembly; Pulse Generator Diagram - Piper Navajo Chieftain PA-31-350 Service Manual

NAVAJO CHIEFTAIN SERVICE MANUAL
417
PL2
FOR TEST ONLY
12V O CENTER VOLTMETER
C C OFF SYNC
D ON MAN
E
G G
MARK
AFT VIEW
Figure 14-49. Pulse Generator
NOTE
The pulse generator timing mark is always set up when the master
engine is at T.D.C. of No. 1 cylinder on the ignition stroke. The
slave engine is then set at the desired propeller position, cylinder
number 2 at T.D.C. on the ignition stroke and rotate the engine an
additional 22 teeth on the ring gear beyond the timing mark.
f.
Connect the electrical plug connector to the pulse generator and install the access panel on top of
the nacelle.
14-143. REMOVAL OF COMPUTER ASSEMBLY. This unit is mounted on a bracket in the upper right
rear corner of the nose baggage compartment. (Refer to Figures 14-47 and 14-50.)
a. The computer unit is accessible through the nose baggage compartment.
b. Disconnect the two electrical plugs that are connected to the computer unit.
c. Remove the three machine screws, on the left mounting flange, that hold the computer unit to
the mounting plate and slide the unit from the mounting plate, toward the left side of the aircraft.
14-144. INSTALLATION OF COMPUTER ASSEMBLY. (Refer to Figures 14-47 and 14-50.)
a. Position the mounting flange on the top right side of the computer unit into the slot on the far
side of the mounting plate.
b. Secure the unit in place with the three machine screws in the top left mounting flange of the
unit.
c. Connect the two electrical plugs to the computer unit.
d. Check the fuse to ascertain that it is in good condition and of the proper size (3 amp - 250 volts).
Revised: 3/11/81
4J14
ACCESSORIES AND UTILITIES
4114