Piper PA-32R-301T SARATOGA S, Руководство по обслуживанию

Страница: 755 / 956

8. Check the capacitors for looseness in the magneto cover of the harness assembly and for any physical
damage. Using a Bendix 11-1767-1, -2 or -3 condenser tester or equivalent, check capacitors for
capacitance, series resistance and leakage. Capacitance shall be 0.34 to 0.41 microfarads.
9. Check magneto to engine timing per instructions given in the following paragraph.
10. Check action of impulse coupling. With the ignition switch off, observe breaker cam end of rotor
while manually cranking the engine through a firing sequence. The rotor should alternately stop and
then (with an audible snap) be rotated rapidly through a retard firing position. If impulse action is not
correct, remove the magneto for overhaul.
MAGNETO INSTALLATION AND TIMING PROCEDURE (TIMING MAGNETO TO ENGINE).
1. Installation of the magneto to the engine may be accomplished without removal of the cover from the
magneto. Also, the magneto cover has switch terminal outlets for the right and left sides of the magne-
to located in the center of the harness lead outlet sections of the cover.
2. The magneto incorporates a built-in pointer and a degree wheel with sufficient reference to assist the
mechanic in magneto timing procedures. Printed upon the rotating magnet are marks to indicate mag-
neto neutral and magneto “E” gap (8°). Refer to Figure 5. Also included are retard angle references of
15, 20 and 25 degrees. These marks are set up for either clockwise (R) or counterclockwise (L) rota-
tion of the magneto as viewed from the magneto drive end. The timing tooth of the large distributor
gear is marked with red paint. Refer to Figure 6.
3. When correctly timed internally, a magneto will have the timing teeth of the large distributor gears
approximately centered in the timing windows. the R or L (“E” gap) mark on the rotor in alignment
with the pointer and both main breaker points opening, all occurring simultaneously. These three refer-
ences, “E” gap, painted teeth and point opening, are all used when timing the magneto to the engine.
4. Remove the spark plug from the No. 1 cylinder and turn the crankshaft in the direction of normal rota-
tion until the compression stroke is reached.
5. Continue turning the crankshaft until the 20° advance timing mark is in alignment with the small hole
located on the top face of the starter housing at the two o’clock position. (Refer to Figure 3.)
6. Install the magneto-to-engine gasket on the magneto flange.
– WARNING –
Do not attach harness spark plug ends to the spark plugs until
all magneto-to-engine timing procedures and magneto to
switch connections are entirely completed.
– NOTE –
The use of a timing light, unit Part No. 11-9110 or 11-9110-1
will simplify the timing procedure. This unit is available from
the Bendix Corporation, Sidney, New York 13838.
It is recommended that short adapter leads be fabricated to
facilitate connecting the timing light unit to the switch outlet
terminals of the cover. (Refer to Figure 4.)
PIPER AIRCRAFT
PA-32R-301/301T
MAINTENANCE MANUAL
74-10-00
Page 74-5
Reissued: July 1, 1993
4B7