Operator`s manual

RICH
OVERHAUL
MANUAL
LYCOMING
DIRECT
DRIVE
AIRCRAFT
ENGINES
Section
9
Test Procedure
SECTION
9.
TEST
PROCEDURE
9-1.
At the
completion
of
assembly
of the
engine
after
overhaul,
it
is recommended
that theengine
be mounted
upon
a test stand
for
its initial
or
run-in
operation.
The run-in
serves
a
two-fold
purpose;
first,
to seat
piston
rings
and
burnish
any new
parts
that
may
have
been
installed
and
second,
to give
the operator
control
over
the first
critical
hours
of operation,
during
which
time
he can
observe
the functioning
of the
engine
by
means
of the
test
cell
instruments.
Also,
at
this
time
any
malfunction
can
be corrected
and oil leaks
repaired.
9-2. The
test
stand
should
be installed
in
a test
cell
that
is clean
and
free of
any articles
that could
be
moved
by
the test
club
air blast.
9-3.
The
following
instruments
should
be used,
plus
any additional
instruments
that
may
be
deemed
neces-
sary
by
the
operator.
0
°
to 600°F.
temperature
gage,
counter
tachometer,
fuel
flow
meter,
fuel
pressure
gage,
manifold
pressure
gage,
oil
temperature
gage,
oil
pressure
gage
and
an oil flow
measuring
device.
NOTE
Avco
Lycoming
recommends
that
a test
cell
be
used
for run-in
of engines
after
overhaul.
Consult
engine
test equipment,
SSP1169,
for more
detail
list
of cell
equip-
ment
and
schematic
of oil
supply
system
and
fuel. Inthe
event
atest cell
is not
avail-
able, it
is permissible
to
mount the
engine
in the
airframe
for the
run-in
providing
the
following
requirements
are
observed.
1. The
proper
test club,
not
a flight
propeller,
is
used.
2.
A cooling
shroud
equivalent
to atest
cell cooling
shroud
is installed.
3.
The airframe
gages
may not
be used.
All
nec-
essary
calibrated
gages
shall be
installed
indep-
endent
of the
airframe.
RSA-5ADI
MA-4-5
OP
OpEN
RETURN
FUEL LNE
CONN.
.125-27
NPT
FUEL INLET
.250-18
NPT
PRESSURE
CONN..125-27
NPT
Figure
9-1.
Fuel
Metering
Systems
Revised
October
1974
9-1