Cessna T188C - Page 226

MODEL
188 &
T188
SERIES
SERVICE
MANUAL
WARNING
tion and
propeller
control
in full
forward
(low
pitch.
high
rpm).
j.
Check
test
gage
for
pressures
specified
in
para-
DO
NOT
make
fuel
pump
pressure
adjust-
graph
11B-8.
If pressure
is incorrect,
stop
engine
ments
while
engine
is
operating.
and
adjust
pressure
by loosening
locknut
and
turning
the
adjusting
screw
located
at rear
of
aneroid
counter-
f.
If
the
pump
pressure
s
not
5. 5
- 6.5
PSI.
stop
clockwise
(CCW)
to
increase
pressure
and
clockwise
engine
and
turn
the
pump
relief
valve
adjustment
on
(CW)
to
decrease
pressure.
the
centerline
of
the
fuel
pump
clockwise
(CW)
to
in-
crease
pressure
and
counterclockwise
(CCW)
to de-
NOTE
crease pressure.
g.
Maintaining
idle
pump
pressure
and
idle
RPM.
If at
static
run-up.
rated
RPM
cannot
be
obtain
correct
idle
mixture
in
accordance
with
para-
achieved
at
full
throttle,
adjust
pump
pres-
graph
11B-40.
sure
slightly
below
limits
making
certain
h. Completion
of the
preceding
steps
have
provided:
the
correct
pressures
are obtained
when
1. Correct
idle
pump
pressure.
rated
RPM
is
achieved
during
lake-off
roll.
2. Correct fuel flow
3.
Correct
fuel
metering
cam
to throttle
plate
k.
After correct
pressures
are
obtained,
tighten
orientation,
locknut.
i.
Advance
to
full
throttle
and
maximum
rated
en-
1.
Remove
test
equipment.
run engine
to check
for
gine
speed
with the
mixture
control
in full
rich posi-
leaks
and install
cowling.
FUEL METERING
ENGINE DRIVEN
UNIT
FUEL PUMP
EXISTING
FUEL
PUMP
OUTLET HOSE
NIPPLES
TEE
PRESSURE
TEST
HOSE
INDICATOR
NOTE
WHEN
ADJUSTING
UNMETERED
FUEL
PRESSURE
TEST
EQUIPMENT
MAY
BE
"TEED"
INTO
THE
ENGINE
-DRIVEN
FUEL
PUMP
OUTLET
HOSE
AT
THE
FUEL PUMP
OR AT THE
FUEL METERING
UNIT.
Figure
11B-1
Fuel Injection
Pump Adjustment
Test Harness
11B-12