Piper Cherokee Six - Page 239

PIPER
CHEROKEE
SIX
SERVICE
MANUAL
5A-29.
TESTING
HYDRAULIC
SYSTEM.
The hydraulic
system should
be
tested to
determine
that
it functions
properly after
performing
any service
or repairs.
It is suggested
that the
airplane be
connected
to an outside
power source
in order to
conserve the
battery.
(Refer
to External
Power
Receptacle,
Section
II.)
CAUTION
Turn master
switch OFF
before
inserting or
removing
external power supply plug.
a.
Place
airplane
on
jacks.
(Refer
to Jacking,
Section
II.)
b. With
gear
down. master
switch
ON,
and circuit
breaker
closed,
place landing
gear
selector
switch
in the
UP position.
The pump
should
immediately
start
operating
and the
gear retract.
The
red gear
unsafe
light
on the
instrument
panel
should
light up
until
the gear
is
fully retracted.
The hydraulic
pump
should
stop operating
after
full gear
retraction.
c. Place
gear selector
switch
in DOWN position.
The
gear should
extend and
lock in
position.
Gear down
lights
on the
instrument
panel
will light
up when
all three
gears are
locked
in position.
Inspect
hydraulic
system
for leakage
of hydraulic
fluid.
d. Recycle
the landing gear
to determine
that it functions
properly.
CAUTION
Prior
to removing
the airplane
from
jacks, turn
master
switch
on and
determine
that
all three
green
lights
are energized.
This
will
indicate
the
landing
gear
is
down
and
locked.
e. To check
operation
of gear back-up
extender
actuator,
refer to Paragraph
5A-14
for
Check
and
Adjustment
Procedures.
5A-30.
SERVICING
HYDRAULIC
PUMP/RESERVOIR.
The fluid
level of the
reservoir of
the combination
pump and
reservoir should
be checked every 50
hours by viewing
the fluid
through
the filler
plug hole in
the hydraulic
pump. Access
to the pump
is through
the panel
at the
left side of forward baggage
compartment.
To check
fluid level,
remove the
filler plug located
on the
forward side
of the pump
and
ascertain
that fluid is visible
up to the bottom
of the filler plug
hole. Should fluid
be below
the
hole, loosen
the vent screw
and add
fluid, MIL-H-5606A,
through
the filler
hole until
full. Reinstall the
filler plug and tighten
the vent screw.
Revised: 7/29/77
HYDRAULIC SYSTEM
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