Micron Sprayers Micronair AU8000 Service manual
AU8000
SPRAYER
Operator's Handbook
and
Parts Catalogue
Micron Sprayers Limited
Bromyard Industrial Estate
Bromyard
Herefordshire HR7 4HS
United Kingdom
Tel: (01885) 482397
+44 1885 482397
Fax: (01885) 483043
+44 1885 483043
Web site: www.micron.co.uk 07/03
TABLE OF CONTENTS
1. INTRODUCTION ............................................................................................. 1
2. SPECIFICATION ............................................................................................. 1
3. ASSEMBLY ..................................................................................................... 2
4. OPERATION ................................................................................................... 3
4.1 Operation of Standard Sprayer ............................................................. 3
4.2 Operation of Sprayer with Chemical Pump ........................................... 5
4.3 Operation of Sprayer with Filling Pump................................................. 6
5. HEALTH AND SAFETY ................................................................................... 6
6. CALIBRATION................................................................................................. 8
6.1 Output Rate of Chemical....................................................................... 8
6.2 Adjustment of Droplet Size.................................................................. 12
7. MAINTENANCE ............................................................................................ 13
7.1 Knapsack Mistblower – Routine Maintenance .................................... 14
7.2 Possible Engine Faults and Remedies................................................ 14
7.3 Maintenance of Sprayhead ................................................................. 16
8. PARTS LISTS................................................................................................ 18
8.1 AU8000 Sprayhead............................................................................. 18
8.2 AU8000 Atomiser................................................................................ 20
9. CONVERSION FACTORS ............................................................................ 22
MICRONAIR AU8000 SPRAYER
1. INTRODUCTION
The AU8000 Sprayer consists of a Micronair AU8000 sprayhead mounted on a knapsack
mistblower.
The sprayhead provides a narrow, easily controlled spectrum of spray droplets to ensure
an even distribution of product with a minimum of wastage. Air from the mistblower rotates
the atomiser and is then directed into the airstream which carries the spray safely away
from the operator and ensures maximum swath width and penetration of foliage.
The AU8000 sprayer is intended for use in agriculture, public health spraying, migratory
pest control (locust, armyworm etc.) and in any other application where a safe, effective,
portable sprayer is required. It can be used with conventional water-based chemicals
(both solutions and solids in suspension) and with specialised ULV formulations. The unit
is supplied with easily interchangeable restrictors for quick and easy calibration of output
rate for all chemicals and application techniques.
Regardless of chemical type or application rate, the AU8000 sprayhead ensures optimum
coverage of the target with a minimum wastage of chemical due to incorrectly sized
droplets or run-off.
The AU8000 sprayhead is also available separately as a conversion kit for use with an
existing mistblower. For satisfactory operation, the air output from the mistblower must be
as shown in the specification below.
2. SPECIFICATION
AU8000 Sprayhead
Length: 30 cm
Diameter: 15 cm
Weight: 1.5 Kg
Air inlet tube dia: 65 mm
Chemical flow rate: 0.02 – 1.20 litres/min
Spray droplet size: Adjustable 40 – 200 microns VMD subject to formulation used
Tank and Blower
Chemical tank capacity: 17 litres max
Weight (empty): 10.7 Kg
Engine: 77 cc 5 HP (3.6 KW) 2-stroke
Fuel tank capacity: 2 litres
Fuel consumption: 2 litres/hour approx
Blower output: 20 m3/min
Air velocity: 125 m/sec at outlet
2
MICRONAIR AU8000 SPRAYER
3. ASSEMBLY
These instructions apply both to AU8000 sprayheads supplied as part of a complete
sprayer and to sprayheads supplied as conversion kits. The steps with numbers in square
brackets [ ] refer to conversion kits ONLY and should be disregarded when assembling a
sprayer supplied complete. There may be some minor differences when installing
conversion kits on some models of sprayer. Parts are identified by their reference number
in Fig. 5.
[1.] Ensure that the mistblower is empty, clean and in good running order.
[2.] Disconnect the chemical feed hose from any existing on/off valve or flow regulator.
Leave the feed hose connected to the chemical tank.
[3.] Remove the original spray nozzle and outlet, leaving only the flexible air duct
attached to the blower.
4. Insert one end of the rigid air tube (19) into the inlet of the sprayhead so that 40 mm
of tube is inside the casing.
5. Slacken both clamping screws of the handle and valve assembly (13). Slide the
handle over the air tube with the handle angled towards the sprayhead. Position the
handle with one clamp over the slotted inlet of the sprayhead casing and the other on
the air tube. Tighten both clamping screws to grip both the sprayhead and air tube.
6. Temporarily insert the free end of the air tube into the flexible air duct from the
mistblower.
7. Put on the knapsack mistblower and hold the sprayhead at the correct angle for the
crop or pest to be sprayed. Cut the air tube (19) as required to give a comfortable
position for the sprayhead when held by its handle. The sprayhead should also be
rotated to the most convenient position.
8. Place a pipe clip (20) over the end of the flexible air duct and tighten the clip to grip
the air tube.
9. Push the feed hose from the chemical tank on to the inlet fitting (17) of the control
valve. Note that this fitting is stepped to accept varying sizes of hose. If necessary,
the hose should be cut to length or replaced if it is too short. Secure the hose with
the pipe clip (12) provided.
10. Select the appropriate flow restrictor tube (8) (see section 6) and fit this to the outlet
of the on/off valve using the cap nut (14). Ensure that the filter (16) is in position.
11. Connect the atomiser feed hose (11) to the outlet of the flow restrictor and secure
with a pipe clip (12).
12. Fill the tank with a non-toxic liquid (e.g. water for conventional application or
kerosene for ULV) and run the sprayer for several minutes (see Operation section 4)
to test for leaks.
3
MICRONAIR AU8000 SPRAYER
Fig. 1 – Attachment of AU8000 Sprayhead to Mistblower
4. OPERATION
This section describes the operation of an AU8000 sprayer with the knapsack mistblower
supplied by Micronair. If the sprayhead is used with a different mistblower, some operating
procedures may differ; refer to the mistblower manufacturer's instructions.
4.1. Operation of Standard Sprayer
1. Make up a mixture of 25 parts regular (NOT high octane) petrol (gasoline) and 1 part
(4%) two-stroke oil. Standard engine oil should NOT normally be used. If two-stroke
oil is not available, SAE 40/50 oil may be used for short periods.
See mistblower instruction book for full fuel mixing instructions.
2. Close the fuel valve under the fuel tank and pour fuel (as mixed in step 1) into tank.
DO NOT OVERFILL.
3. Ensure that the chemical control valve on the handle is closed with its lever parallel to
the sprayhead.
4. Remove the cap of the chemical tank and check that the flexible air hose inside is
pushed firmly onto the fitting at the bottom and into the filter at the top. Also check
that the cap at the opposite side of the inside of the tank is pushed firmly in place.
5. Pour the required amount of chemical into the tank and replace the cap firmly.
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