Alternator System Test Procedure (Chrysler) - Piper Cherokee Six Service Manual

PIPER CHEROKEE SIX SERVICE MANUAL
NOTE
The amount of current
shown on the ammeter
is the
load in amperes
that is demanded
by the electrical
system from the alternator.
As a check,
take for ex-
ample a condition where
the battery is demanding 10
amperes
charging
current,
then switch on the landing
light.
Note the value in amperes
placarded
on the
panel for the circuit breaker
(10 amps) and multiply
this by 80 per cent, you will arrive
at a current
of 8
amperes.
This is the approximate
current
drawn by
the landing light. Therefore,
when the landing light is
switched on, there will be an increase
of current from
10 to 18 amperes
displayed
on the ammeter.
As each
unit of electrical equipment
is switched
on, the cur-
rents will add up and the total, including
the battery.
will appear
on the ammeter.
10-4. ALTERNATOR SYSTEM TEST PROCEDURE (CHRYSLER).
a. Start engine and set throttle for 2000 to 2200 RPM.
b. Switch on the following loads and observe the ammeter reading increases as follows:
1. Rotating beacon
3.5 amps
2. Anti-Collision lights (PA-32R-300)
4.4 amps
3. Landing light
8.0 amps
4. Navigation and all instrument panel lights
6.5 amps
5. All passenger reading lights
4.0 amps
6. Pitot heat
13.0 amps
7. Cigarlighter
8.0 amps
c. If the ammeter fails to show an increase as indicated, refer to troubleshooting chart.
d. Additional loads may be simulated by adding landing lights (8.0 amps per light)
from the bus bar to the aircraft ground. (Refer to Figure 10-3.)
e. Maximum output of the alternator should be 60 ± 5.0 amps at 2000 to 2200 RPM.