Cessna T188C - Hopper; Internal Sealing; Trouble Shooting

MODEL
188 & T188
SERIES SERVICE
MANUAL
PERSONAL SAFETY WARNING (Cont)
5.
An adequate area
for personal
hygiene is a
must, shower,
sink, soap
and plenty of use.
This is
for your protection.
6
Carrying foods, drinks, or
cigarettes in pockets or work
area is extremely dangerous,
as these
items can become the medium of ingestion for the contaminates.
7. Additional
information may be obtained
by contacting the local
County Agent or Chemical supplier.
19-3.
TROUBLE SHOOTING. When
trouble is en- with quick-loader
valves, when installed.
Beginning
countered
with dispersal equipment, check
that con- with serial 18800573,
a spring-loaded flapper
check
trols operate without
binding or lost motion, that
they valve is installed at
this opening. Holes in the filler
are rigged
properly, and that they are not
damaged. cap in the top
loading door provide an additional
air
Trace
any leakage
of chemicals to
its source and
bleed
for the hopper.
Removal, installation
and main-
correct
the cause. On
models employing
a hopper
tenance
are the same
on all hoppers except
for re-
relief
valve, check
the valve periodically
to assure
moval
and installation
of dispersal
equipment on the
it functions satisfactorily.
A
major source of
trouble
glass-flange hopper.
Refer to
paragraph 19-7
for
is
clogged strainers
and other components,
caused
by sealing
instructions during
hopper installation.
Hop-
inadequate
flushing and
cleaning. Refer
to the manu-
per repair
is outlined in
Section 17. Beginning
with
facturer's
instruction manual
and Cessna
Service Kit
serial 18800833,
a hopper quantity
light is mounted
number SK188-28
for trouble shooting
dispersal
on
the aft lower surface
of the hopper
to provide
illu-
equipment.
Refer to
the Cessna
Parts Catalog
for
mination
so
the pilot can
determine
the amount
of
replacement
parts.
material
remaining
during night
spraying
operations.
Details of this light installation are outlined in Section
16.
NOTE
19-5.
HOPPER
REMOVAL
AND
INSTALLATION.
The
hopper
is removable
from
the aircraft,
.
.. a.
Drain and
flush hopper
thoroughly,
observing
but no provisions are made for fight with the precautions outlined on page iv.
hopper removed
for
flight with the
b.
Remove side
panels on both
sides of hopper.
c. Remove fairing strip at upper rear of hopper.
n wing
strut upper
fairings and
slide fair-
19-4.
HOPPER.
A hopper,
with
a top
loading
door,
ings
along
strut
is located forward
of the
cockpit on all
AG aircraft
.
fuel
tank
cover, if installed.
e. Remove metal fuel tank cover, if installed.
Hopper
capacity
is 200-gallons,
except
for the
AG
f.
Remove
nuts
from
strut-attach
bolts;
drive
bolts
truck, which
holds
280-gallons.
Prior
to 1880083,
forward
until
threaded
ends
are flush
with
aft end
of
hoppers
are made
of glass-fiber
reinforced plastic
fittings
to allow
clearance for
hopper removal.
Beginning
with 1880083,
hoppers
are made
of Dere-
Thru 188-0274,
disconnect
hose
at vacuum
re-
kane.
A clear area
with graduations
marked on
the lief
valve door. Beginning
with
188-0275, remove
lief valve door. Beginning with 188-0275, remove
rear of the
hopper enables
the pilot
to observe
mater-
vacuum
relief tube
ial
level on the
ground or
in flight,
A clear area
with
vacuum
relief
tube
h.
Disconnect
quick-loader
valve
lines
at hopper,
marked graduations
is also located on
each side of
if installed.
the hopper.
the
hopper.
i. Disconnect
controls
at
control
valve.
Prior
to serial 188-0413,
a quick-disconnect
adapter
j. Disconect
discharge tube
at pump or
valve.
j. Disconnect
discharge
tube at
pump or valve.
is installed at the bottom of the hopper for attachment . Remove fairings at bottom of hopper.
of a spray
system pump assembly or
a gate box
of a spray system pump assembly or a gate box. 1. Unclamp or unbolt pump or gate box, and remove.
Beginning
with serial 188-0413, a glass-fiber
flange m. Remove
bolts attaching hopper to
aircraft struc-
is incorporated on the bottom of the hopper, elimin-
ating the need for a quick-disconnect flange and adap- ture. (Refer to paragraph 19-7 )
ter. Beginning with serial 188-0028, a hopper with n. Remove structural tubing at front of hopper, if
a larger
opening and
a larger adapter
is available
for
large hopper
is installed.
special
requirements.
A
pump assembly
with
a large
Lift hopper
straight
up out
of aircraft.
bottom
plate is required
to attach
to this hopper.
A p.
Reverse preceding
steps for installation.
Rig
steel baffle in all
hoppers reduces sloshing and
adds controls as outlined
in applicable paragraphs. Refer
strength to the hopper.
Prior to serial 188-0275,
a to paragraph 19-7
for sealing procedures.
spring-loaded relief
valve, connected to an air
vent, 19-6. REPAIR OF
HOPPER. (Refer to Section 17.)
is provided at the upper rear of the hopper to prevent
collapse of the
hopper during emergency
jettison
of 19-7.
INTERNAL
SEALING OF HOPPER.
All bolts,
material.
Beginning with serial 188-0275,
a vacuum nuts,
latches, doublers, filler neck,
etc. that are
relief tube is provided at this location. A filler open- located inside the hopper are sealed with an epoxy
ing
is located at the lower rear of
the hopper for use type
sealant during installation to prevent
leakage
19-3