Cessna T188C - Dust Dispersal Systems; Trouble Shooting; Hopper; Gatebox and Spreader Assembly

MODEL 188 & T188 SERIES SERVICE MANUAL
$ 2
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.
8
,Cr
5
.0l
1.
Nozzle
11
2.
Diaphramn
3.
Spring
4. Seat
5. Strainer
6. Orifice
7. Spray
Pattern
8.
Nut
Retainer
9.
Core
10.
End Cap
Assembly
11.
Retainer
Figure
19-12.
Spray
Nozzle
19-25. DUST DISPERSAL SYSTEMS. Various sys- handle in the cockpit. Ram air flows underneath the
tems have
been available as optional equipment.
gate box where
it picks up the chemical and
carries
Major
components of the systems
include a hopper, it into
the spreader, where it Is dispersed
through
gate box with agitator and
gate-control mechanism,
vanes or wing panels
of the spreader.
cockpit
control
handle
and
connecting
rod,
and
spreader
assembly.
The
installations
illustrated
on
WARNING1
figure 19-5 includes a center section, left and right
wing panels. The
one-piece assemblies are
shown Insure that
gate control handle and micro-
in figure 19-7. The spreaders
are equipped with ad-
meter screw stop is
FULL AFT and stop
justable
side doors
on the inboard
sides of the
is DOWN holding
handle,
before working
spreader. The "THINLINE"
model, figure
19-7,
under aircraft.
improves
aircraft performance
by
creating less
drag,
and is a high volume
unit.
19-29. GATEBOX
CONTROL.
Material
flow through
the gate
box
is controlled
by
a handle
in the
cockpit.
19-26. TROUBLE SHOOTING. See paragraph 19-3. The handle is moved along a fixed micrometer screw
to a
flow rate position
that is determined
by an
ad-
19-27. HOPPER. The same
hopper that is used for
justable stop on the micrometer
screw. A crank on
the liquid spray system is also used for the dust dis- the micrometer screw may be operated from the
persal system. Instead of the pump assembly used cockpit to set the stop. The hopper control handle
with the spray
system, a gate box with agitator
is is also used
as an emergency dump lever.
This is
clamped or bolted to the bottom of the hopper. accomplished by flipping the adjustable stop out of
position
so the handle
may be pushed
to the full for-
19-28.
GATEBOX AND
SPREADER ASSEMBLY.
ward position.
Frequently
check the rubber
boot on
The gatebox is available in three configurations, the fuselage underside for damage which could per-
without an agitator, with ram air fan driven agitator, mit chemicals to enter the cockpit.
or with
an electric
driven
agiataor
(12 or
28 volt).
The gate (gatebox
outlet door) is controlled
by a 19-30. REMOVAL
AND INSTALLATION.
19-22