Piper PA-32RT-300T User Manual

LANCE
II
SERVICE
MANUAL
fied
voltage
by
varying
the
resistance
unit.
Then
read
the
current
draw
and
armature
speed
and
compare
these
readings
with
the
values
listed
in the
published specifications. Interpret the
RESISTANCE
test
results
as
follows:
a. Rated current draw and no-load
speed
indicate
normal
condition
of the
cranking
motor.
b.
Low
free
speed
and
high
current
draw
indicate:
1. Toomuchfriction-tight,
dirty,
SECUARY
LOCKD
or loose
pole
shoes allowing
armature
to
drag.
CRANANK
MGOTOR
2.
Shorted
armature.
This
can
be
further
checked
on
a growler
after
Figure
1 1-37.
Resistance
Test
disassembly.
3.
Groundedarmature
or
fields.
Check
further
after
disassembly.
c.
Failure
to operate
with
high
current
draw
indicates:
1.
A
direct
ground
in the
terminal
or
fields.
2.
"Frozen"
bearings
(this
should
have
been
determined
by turning
the
ar-
mature
by
hand).
d.
Failure
to
operate
with
no current
draw
indicates:
1.
Open
field
circuit.
This
can
be
checked
after
disassembly
by inspecting
internal
connections
and
tracing
circuit
with
a
test lamp.
2.
Open
armature
coils.
Inspect
the
commutator
for
badly
burned
bars
after
disassembly.
3.
Broken
brush
springs,
worn
brushes,
high
insulation
between
the
com-
mutator
bars
or
other
causes
which
would
prevent
good
contact
between
the
brushes
and
commutator.
e.
Low
no-load
speed
and
low
current
draw
indicate:
1.
High
internal
resistance
due
to
poor
connections,
defective
leads,
dirty
commutator
and
causes
listed
under
(d).
f.
High
free
speed
and
high
current
draw
indicate
shorted
fields.
If shorted
fields
are
suspected,
replace
the
field
coil assembly
and
check
for
improved
per-
formance.
11-53.
RESISTANCE
TEST.
(Refer
to Figure
11-37.)
This
test
requires
that
the
pinion
be
locked
securely
so it
cannot
rotate.
When
the specified
voltage
is
applied,
the
current
should
fall
in
a range
as
indicated
in published
specifications.
Issued:
1/3/78
ELECTRICAL
SYSTEM
2H1

Piper PA-32RT-300T Specifications

General

Brand	Piper
Model	PA-32RT-300T
Category	Aircrafts
Language	English