Piper Cherokee Six - Page 223

PIPER
CHEROKEE
SIX SERVICE
MANUAL
1. Connect
the
0 to 1000
psi gauge
to
the low
pressure
port of
the pump
base.
2. Connect
the
0 to 3000
psi gauge
to
the high
pressure
port of
the pump
base.
3.
Connect
black
lead
of pump
motor
to
the negative
terminal
of the
DC
power
supply.
4.
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,
add
fluid, MIL-H-5606A,
through
the filler
hole
until
full. Reinstall
the filler
plug
and
tighten.
NOTE
A
small
vent
hole
is located
under
the
vent
screw
head.
Retain
1/64
inch
clearance
between
the
screw
head
and
the
small
vent hole.
5.
Bleed
air from
the
attached
lines.
(Lines
may
be bled
by
alternately
connecting
blue
lead
and
green
lead
to the
positive
terminal
of the
power
supply
until all
air
is
exhausted.)
6.
Connect
blue
lead
to
positive
terminal
of power
supply.
Pump
should
operate
and
the
high
pressure
gauge
should
indicate
a
specific
pressure,
as
given
in
Table
VA-I.
(Should
the
gauge
indicate
a pressure
below
or
over
the given
pressure,
adjust
valve
"A,"
Figure
5A-3
accordingly
to
obtain
the
desired
reading.)
NOTE
When
increasing
pressure,
the
pump
running
time
must
not
exceed
12 seconds.
There
should
be no
external
leakage
while
performing
Steps
5
thru
8.
7.
Disconnect
blue
lead.
The
high pressure
reading
should
not drop
more
than
300
psi in
five
minutes.
High
pressure
may
not
be selected
again
for
five
minutes.
8.
Connect
green
lead
to
positive
terminal
of power
supply.
Pump
should
operate
in reverse,
dropping
reading
on
high
pressure
gauge
to
zero.
The
low
pressure
gauge
should
indicate
500
to 800
psi.
(Should
the
gauge
indicate
a pressure
below
500 psi
or over
800
psi,
adjust
valve
"B,"
Figure
5A-3,
accordingly
to obtain
desired
reading.)
Disconnect
green
lead.
Both
pressure
gauges
should
indicate
zero psi.
9.
Should
it
be necessary
to
check
the
pump
motor,
first
connect
the ammeter
in
the
electrical
circuit
with
the positive
terminal
of the
meter
to
the black
lead and
negative
terminal
of the
meter
to the
negative
terminal
of the
DC
power supply.
Revised:
7/29/77
HYDRAULIC
SYSTEM
1J7