Dust Dispersal Systems; Trouble Shooting; Hopper; Gatebox And Spreader Assembly - Cessna 188 Series Service Manual

MODEL 188 & T188 SERIES SERVICE MANUAL
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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