Cranking; Maintenance Of Starting System; Exploded View Of Gear Reduction Starting Motor - Piper Dakota Maintenance Manual

CRANKING

MAINTENANCE OF STARTING SYSTEM

Inspect starting circuit at regular intervals, the frequency of which is determined by the amount of service
and the conditions under which the airplane is operated. It is recommended that such inspection be made twice
a year and include the following:
Be sure no baking soda solution enters the battery cells.
1. Check battery with a hydrometer to be sure it is fully charged and filled to proper level with water.
Load test battery to determine battery condition. If dirt and corrosion have accumulated on battery,
clean with a solution of baking soda and water.
2. Inspect starting circuit wiring to be sure that all connections are clean, tight, and that the insulation is
sound. Perform a voltage loss test to locate any high resistance connections that will affect starting
motor eff i c i e n c y. This test is made with a low reading voltmeter while cranking the engine or at
approximately 100 amperes, and 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.
c. If voltage loss is greater that the above limits, make additional tests over each part of circuit to
locate the high resistance connections.
PIPER AIRCRAFT
MAINTENANCE MANUAL
Figure 80-1. Exploded View of Gear Reduction Starting Motor
—CAUTION—
PA-28-236
2K24
80 - 11 - 00
Page 80 - 04
Reissued: August 1, 1986