Raytheon Beech Baron E55 - Page 677

Ral~heon
Aircraft
Company
BARON
55
AND
58
SHOP
MANUAL
I
Chart
30
TROUBLESHOOTING
GENERATORS
INDICATION
PROBABLE
CAUSE
REMARKS
1.
No
ammeterindication.
a.
Engine
speed
to
low,
a.
Increase
speed.
b.
Loose
connection.
b.
Check
connections
throughout
system.
c.
Open
field circuit
in
generator;
c.
Test
resistance
of
field.
Check
defective
armature.
field circuit
connections.
Replace
generator
if
defective.
d.
Brushes
not
contacting
d.
Clean
brushes
and holders with
a
commutator,
clean,
lint-free,
dry
cloth.
Replace
weak
springs.
e.
Brushes
worn
out.
e.
Replace
brushes
if
worn
to
a
I
length
of 5/16
in..
f.
Dirty
commutator,
f. With
generator
running,
clean
commutator
with
No.
0000
sandpaper.
Use
air
jet
to
remove
grit.
g.
Defective
voltage
regulator.
g.
Replace
regulator
h.
Defective
ammeter.
h.
Replace
ammeter
2.
No
generatoroutput.
a.
Circuit
breaker
tripped,
a.
Reset.
b.
Open
circuit,
b. Check
continuity
of
circuit.
c.
Loss
of residual
magnetism
c.
Flash
generator
field.
d.
Defective
generator
control switch
d. Test switches.
Replace
if
or
reverse
current
relay,
defective.
3.
Low
generatoroutput.
a.
Generators
not
paralleled.
a.
Readjust
minimum-load
voltage,
then
readjust
paralleling
coil
in
voltage
regulator.
4.
Ammeter
reads
off
scale
in
a.
Defective
reverse-current
relay,
a.
Replace
relay.
wrong
direction.
Dec
31/03Page
80
SECTION
13
E21