Piper Aircraft Corporation Malibu Mirage PA-46-350P, Airplane Maintenance Manual

Page: 1423 / 1956

PAGE 15
Feb 28/07 7G1
74-10-00
PIPER AIRCRAFT, INC.
PA-46-350P, MALIBU MIRAGE
MAINTENANCE MANUAL
8 Tighten timing disk retaining screws. Reverse T-125 assembly fixture and place
magneto in it, flange down (use T-123 timing plug). Remove T-150 "E" Gap Gauge
from magneto.
9 Rotate magneto against the direction of normal rotation (clockwise for left-hand
rotation magnetos and counterclockwise for right-hand rotation magnetos) until the
magneto bumps against the pin in the T-125 assembly fixture. The magneto rotor
shaft is now retarded from E-gap position the number of degrees indicated on the
magneto dataplate.
10 Using a timing light, adjust the retard contact points to where they are just opening.
Tighten the adjusting screws to secure the retard points in this position. Torque
adjusting screws to 18-20 in-lbs.
11 Apply cam grease sparingly to each lobe of the cam.
12 Attach coil lead wire to the male terminal of the primary point assembly.
13 Install retard contact breaker lead by inserting ignition switch screw through eyelet
end of retard breaker lead wire and then through magneto housing. Secure screw
using nut and lockwasher.
CAUTION: RETARD BREAKER LEAD WIRE MUST BE CHANNELED SECURELY UNDER
CONDENSER. FAILURE TO DO SO MAY CAUSE THE LEAD WIRE TO
INTERFERE WITH ROTOR GEAR MOVEMENT OR POINT OPERATION.
(10) Assemble the condenser into the distributor housing, being sure to rotate the condenser wire
the same rotation as the condenser is tightened in the housing. For left magneto only, ensure
retard breaker contact lead is channeled underneath condenser.
(11) Distributor gear assembly.
(a) Install carbon brush into spring.
1 Insert small end of carbon brush tapered end of spring.
2 Turn carbon brush clockwise until shoulder of carbon brush seats spring.
(b) Install carbon brush assembly into distributor gear.
1 Insert the open end of the spring into open end of the distributor gear shaft.
2 Gently press the carbon brush and spring assembly into the shaft until the spring
seats on the bottom of the shaft. The top of the carbon brush should protrude from
the top of the shaft approximately 1/4 inch.
(12) Install distributor block.
(a) Assemble the distributor gear in the
distributor block with the L&R facing
you.
(b) Assemble the bearing bar to the
distributor block as shown in Figure 10.
(13) Connect condenser wire.
(a) Connect condenser wire to the
remaining terminal of the contact
assembly.
(b) Attach the terminal with the lead
pointing left.
(14) Connect retard terminal wire to retard
contact points.
(15) Install rotor gear onto shaft.
Bearing Bar Assembly
Figure 10