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MODEL 182 & T182 SERIES SERVICE MANUAL
16-34.
REMOVAL AND INSTALLATION.
60-amperes.
A 28-volt 95 amper alternator is
(See figure 16-3.)
offered as optional equipment on the T182.
The alter-
a.
Disconnect the ground cable from the negative
nator is three-phase. delta connected with integral
terminal of the battery.
silicon diode rectifiers.
The moving center part of
b.
Remove the nuts. washers, ground strap and
the alternator (rotor) consists of an axial winding with
diode board from the studs of the receptacle and
radial interlocking poles which surround the winding.
remove the battery cables.
With excitation applied to the winding through slip
c.
Remove the screws and nuts holding the recep-
rings. the pole pieces assume magnetic polarity.
tacle.
The receptacle will then be free from the
The rotor is mounted in bearings and rotates inside
bracket.
the stator which contains the windings in which the
d.
To install a ground service receptacle, reverse
ac is generated.
The stator windings are three-
this procedure.
Be sure to place the ground strap
phase, delta connected. and are attached to two diode
on the negative stud of the receptacle.
plates, each of which contains three silicon diodes.
16-35.
ALTERNATOR POWER SYSTEM.
NOTE
16-36.
DESCRIPTION.
The alternator system con-
A 2201074-1 balance weight is installed
sists of an engine driven alternator, a voltage regu-
on tailcone bulkhead station 230. 187
lator mounted on the left hand side of the firewall and
when the 95 amperes alternator is in-
a circuit breaker located on the instrument panel,
stalled.
The system is controlled by the left hand portion of
the split rocker. master switch labeled ALT.
The diode plates are connected to accomplish full-
wave. rectification of the ac.
The resulting dc out-
16-37.
ALTERNATOR.
put is applied to the aircraft bus and sensed by the
voltage regulator/alternator control unit.
The regu-
16-38.
DESCRIPTION.
Thru 1977 Models the alter-
lator controls the excitation applied to the alternator
nator used on the aircraft is rated at 14-volts at 60-
field, thus controlling the output voltage of the alter-
amperes continuous output.
Beginning with 1978
nator.
Models the alternator used is rated at 28-volts at
16-39.
TROUBLE SHOOTING THE ALTERNATOR SYSTEM. (THRU 1977 MODELS).
TROUBLE
PROBABLE CAUSE
REMEDY
AMMETER INDICATES HEAVY
Shorted radio noise filter
1. Remove cable from output
DISCHARGE WITH ENGINE
or shorted wire.
terminal of alternator. Check
NOT RUNNING OR ALTERNA-
resistance from end of cable
TOR CIRCUIT BREAKER OPENS
to ground (MASTER SWITCH
WHEN MASTER SWITCH IS
MUST BE OFF).
If resistance
TURNED ON.
does not indicate a direct short,
proceed to step 4. If resistance
indicates a direct short, proceed
to step 2.
2.
Remove cable connections
from radio noise filter.
Check
resistance from the filter input
terminal to ground. Normal in-
dication is infinite resistance.
If reading indicates a direct
short, replace filter.
If no
short is evident, proceed to
step 3.
3.
Check resistance from ground
to the free ends of the wires which
were connected to the radio noise
filter (or alternator if no noise
filter is installed).
Normal indica-
tion does not show a direct short.
If a short exists in wires, repair
or replace wiring.
16-20
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Troubleshooting
