Piper PA-32R-301T SARATOGA S, Maintenance Manual

Page: 239 / 956

D.C. GENERATION (cont.)
(d) Rotor Ground Test (Refer to Figure 29.) (cont.)
1 Set the ohmmeter selector switch on 1000 scale and zero the meter.
2 Touch one lead to the rotor shaft and the other lead to first slip ring then to the other. The
ohmmeter should read infinity (no needle movement) in both checks.
3 If the meter shows a reading (needle moves) a short to ground exists. Check the soldered
connections at the slip rings to make sure they are secure and grounding against the rotor
shaft, or that excess solder is not grounding the rotor coil.
4 Replace the rotor if repairs cannot be made.
(e) Stator Continuity Test (Refer to Figure 30)
1 Using a 100 watt soldering iron, disconnect the three stator wires from diode assembly,
and remove stator from rear housing.
2 Set the ohmmeter selector switch on resistance scale 1 and zero the meter.
3 Connect ohmmeter leads alternately between all three sets of leads. Meter readings
should be equal between any pair of stator leads.
4 If unequal readings are obtained, the stator winding is open. Check wiring junction. If
breaks are found repair and recheck. If unequal readings still exist, replace the stator.
Stator Continuity Test
Figure 30
PIPER AIRCRAFT
PA-32R-301/301T
MAINTENANCE MANUAL
24-30-00
Page 24-34
Reissued: July 1, 1993
1L10
STATOR
OHMMET ER