Cessna T188C - Hydraulically-Operated Dispersal System; Spray Pump Strainer

MODEL
188 & T188
SERIES SERVICE
MANUAL
A FILLER
FILLR VALVE
ENGINt.DRIVEN
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BYPASS ON-OFF
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OFF-ONI ;
18801041
FIIR
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THRU
\
HYDRAULIC
COCKPI1
CONTlOL
18801424
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....................
~~~~~GATE
BOX*-.
,-»00»~,BOO
PiESSURE
OAOE
SPRAY
PUMP
SPRAY
VALVE
m PATH
OF FLOW
FROM RESERVOIR
^/'/^
PRESSURIZED
LINES
WHEN:
(1) Engine
and engine-driven
pump runnin
18800573
THRU
18801374
(2)
Cockpit
control:
ON
(3)
Hydraulic
motor: INOPERATIVE
(4) Relef valve: OPEN
Figure
19-17.
Hydraullcally-Operated
Dispersal
System Schematic
(Sheet
2 of 4)
LEGENDS FOR
SCHEMATICS ILLUSTRATED
ON SHEETS 3 AND
4 AND FIGURE 19-18.
( CONDITION:
)
NDITION:
(1)
Engine
and
engine-driven
pump
running
(1) Engine
and engine-driven
pump
running
(2)
Cockpit
control:
ON
(2)
Cockpit
control:
OFF
(3) Hydraulic
motor:
OPERATIVE
(3) Hydraulic
motor:
INOPERATIVE
(4)
Relief valve:
CLOSED
(4) Relief
valve:
CLOSED
)
CONDITION:
(i)
CONDITION:
(1) Engine and engine-driven pump running (1) Engine and engine-driven pump running
(2) Cockpit control: ON (2) Cockpit control: ON
(3) Hydraulic motor: INOPERATIVE
(3) Hydraulic motor:
OPERATIVE
(4)
Relief
valve:
OPEN
(4) Relief
valve:
CLOSED
(5) Boom Pressure valve control: OPEN
to be located
in an area where
the solutions
will not
to keep
two sets of boom
and nozzle
assem-
cause damage to vegetation
or personnel.
biles, one exclusively
for herbicides.
| WARNING-
19-33. HYDRAULICALLY-
OPERATED
DISPERSAL
loommomimumNG) SYSTEMS. (See figure 19-21. ) Engine driven hyd-
After
using herbicides
(plant killers),
it is
raulic
spray systems are
available for
aircraft equip-
imperative
that equipment
be thoroughly
ped with constant
speed-propellers.
The
systems are
cleaned before using other
chemicals that composed
of a pressurized hydraulic
reservoir, an
are not harmful to plants.
A very small
engine-driven pump, mounted
on the accessory pad of
residue
from
some
herbicides
can
severely
the engine,
an
ON-OFF
valve,
pressure
relief
valve,
damage
crops.
Also
remove
all
hose
con-
a hydraulic
fluid
cooler
(prior
to
Serial
18803522),
nections
in the spray system and replace
hydraulic pump,
hydraulic motor, cockpit
control,
with new
hoses.
Some operators
will
prefer
and
associated
lines
and fittings.
The systems
are
installed
in the
baggage area,
immedi-
19-28