Starting System Maintenance; Exploded View Of Gear Reduction Starter Motor - Piper PA-44-180 SEMINOLE Maintenance Manual

CRANKING.
MAINTENANCE OF STARTING SYSTEM.
The starting system should be inspected at regular intervals, the frequency of which should be determined by
the amount of service and the conditions under which the aircraft is operated. It is recommended that such
inspection be made at each 100 hours and include the following:
1. The battery should be checked with a hydrometer to be sure it is fully charged and filled to the proper level
with approved water. A load test should be made to determine battery condition. If dirt and corrosion have
accumulated on the battery, it should be cleaned with solution of baking soda and water.
2. The starting circuit wiring should be inspected to be sure that all connections are clean and tight and that the
insulation is sound. A voltage loss test should be made to locate any high resistance connections that would
affect starting motor efficiency. This test is made with a low reading voltmeter while cranking the engine or
at approximately 100 RPM. The following limits should be used:
A. Voltage loss from insulated battery post to starting motor terminal 0.3 volt maximum.
B. Voltage loss from battery ground post to starter frame 0.1 volt maximum.
If voltage loss is greater than the above limits, additional tests should be made over
each part of the circuit to locate the high resistance connections.
374
RETAINER PLATE
*
GEAR
NEEDLE BEARING
PIPER AIRCRAFT
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
C.E. HEAD ASS'Y
BRUSH SPRING SET
COVER BAND
SEALED BALL BEARING
BENDIX DRIVE
BENDIX DRIVE
SHAFT *
* TRUST WASHERS
Figure 80-1. Exploded View of Gear Reduction Starter Motor
— Note —
BRUSH SET
ARMATURE
BUSHING SET
NEEDLE BEARING
FRAME & FIELD ASS'Y
PINION HOUSING ASS'Y
BRONZE BEARING
3I16
GEAR HOUSING ASS'Y
8 0 - 1 0 - 0 1
Page 80-04
Revised: May 15, 1989