Hardi LZ Series User manual

1
HARDI INTERNATIONAL A/S reserve the right to make changes in design or to add
new features without any obligation in relation to implements purchased before or after
such changes.
LZ
Instruction book
674892-GB-04/2002
Contents
EC Declaration of Conformity.................................................... 2
Operator safety ......................................................................... 3
Description ................................................................................ 4
Function diagram ...................................................................... 5
Connecting the sprayer............................................................. 6
Operating instructions ............................................................... 8
Adjustment of the controls .................................................. 11
Maintenance............................................................................ 14
Cleaning the sprayer .......................................................... 14
Lubrication .......................................................................... 17
Re-adjustment of the Boom................................................ 21
Changing of valves and diaphragms .................................. 26
Changing of ball seat in operating unit ............................... 27
Check of valve cone in distribution valves.......................... 27
Off-season storage ............................................................. 28
Operational problems.............................................................. 29
Technical specifications........................................................... 33
Assembly................................................................................. 39

2
EC Declaration of Conformity
Manufacturer,
HARDI INTERNATIONAL A/S
Helgeshøj Allé
DK 2630 Taastrup
DENMARK
Importer,
declare that the following product;
○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○
○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○○
Adhere extra shipping package labels to inside cover.
A. was manufactured in conformity with the provisions in the COUNCIL
DIRECTIVE of 14 June 1989 on mutual approximation of the laws of the
Member States on the safety of machines (89/392/EEC as amended by
directives 91/368/EEC and 93/368/EEC) with special reference to Annex
1 of the Directive on essential safety and health requirements in relation
to the construction and manufacture of machines.
B. was manufactured in conformity with the standards current at that
time that implements a harmonised standard in accordance with Article 5
(2) and other relevant standards.
Taastrup 19.04.2002
Lars Bentsen
Product Development Manager
HARDI INTERNATIONAL A/S

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We congratulate you for choosing a HARDI plant protection product.
The reliability and efficiency of this product depend on your care. The
first step is to carefully read and pay attention to this instruction
book. It contains essential information for the efficient use and long life
of this quality product.
As the instruction book covers all LZ models, please pay attention to
the paragraphs dealing with precisely your model. This book is to be
read in conjunction with the “Spray Technique” book.
Operator safety
Watch for his symbol . It means WARNING, CAUTION,
NOTE. Your safety is involved so be alert!
Note the following recommended precautions and safe operating
practices.
Read and understand this instruction book before using the
equipment. It is equally important that other operators of this
equipment read and understand this book.
Pressure test with clean water prior to filling with chemicals.
Wear protective clothing.
Rinse and wash equipment after use and before servicing.
Depressurize equipment after use and before servicing.
Never service or repair the equipment whilst it is operating.
Disconnect electrical power before servicing.
Always replace all safety devices or shields immediately after
servicing.
If an arc welder is used on the equipment or anything connected
to the equipment, disconnect power leads before welding.
If any portion of this instruction book remains unclear after read-
ing it, contact your HARDI dealer for further explanation before
using the equipment.
Keep children away from the equipment.

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Description
The HARDI LZ models are designed for the application of crop protec-
tion chemicals and liquid fertilizers.
They consist of a pump, frame with 800, 1000 or 1200 litre tanks, Self-
Cleaning Filter, EC operating unit, LHZ 12, 15, 16, 18, 20, 21 or 24
metre fully hydraulic operated spray boom and transmission shaft.
The design of the diaphragm pump is simple, with easily accessible
diaphragms and valves that ensures liquid does not contact the vital
parts of the pump.
The tank, made of impact-proof and chemical resistant polyethylene,
has a purposeful design with no sharp corners, for easy cleaning.
The EC operating unit consists of: on/off valve, pressure control valve
with built-in HARDI-MATIC, pressure gauge and distribution valves
with pressure equalization.
HARDI-MATIC ensures a constant volume per ha of the liquid at
varying speed in the same gear. The number of revolutions on the
P.T.O. must be kept between 300-600 r/min.
With the Self-Cleaning Filter the impurities that exist in the spray liquid
will by-pass the filter and be recirculated back to the tank via the return
to tank.
The LHZ spray boom is fully hydraulic folded and operated. Individual
folding of right and left outer sections enable alternative boom widths.
Individual boom tilt function for right and left side adapts boom height
to slopping terrain. Slanting control for trapeze suspension compen-
sates for driving on hillsides. All functions are controlled by Direct
Acting Hydraulic system (D.A.H.). The outer sections incorporate
spring loaded breakaway.
Identification plates
An identification plate fitted on the frame and pump is to indicate
model, year of production with serial number and country of origin.
Boom centre frame, and inner/outer sections also have identification
plates indicating boom type and part no. of steel parts. If ordering
spare parts, inform your dealer of these so the right model and version
are described.

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Function diagram
1. Suction filter
2. Pump
3. Self-Cleaning Filter
4. Safety valve
5. Pressure agitator
6. On/off valve with pressure gauge
7. Pressure control valve with HARDI-MATIC
8. Distribution valve with pressure equalization.
9. Sprayer boom.
2
1
3
4
67
8
9
5

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Connecting the sprayer
The sprayer is designed for three point
suspension and is equipped with 28 mm
pivots (cat. II). Pivots can be relocated to
suit the tractor.
WARNING: Note the weight of the sprayer.
Generally it is recommended to:
1. Add ballast to front of tractor.
2. Travel at slower speeds when driving
with a full tank. (The tractor braking
effect will be reduced.)
4. Be careful when filling / lifting the sprayer
for the first time.
Hydraulics
Hydraulic connection requires one double acting outlet for the D.A.H.
system. A single outlet and return can also be used. The hydraulic
hoses are marked with an arrow to indicate direction of oil flow.
The D.A.H. system requires an oil flow between 10 to 90 litres per
minute and a min. pressure of 130 bar. The system has a built-in flow
regulator that maintains constant speed on hydraulic movements.
Before operating the hydraulics, the clip at the distribution valve
(situated at front of tank) should be set for OPEN or CLOSED CEN-
TRE tractor hydraulics.
Most tractors have OPEN CENTRE hydraulics and the valve must be
open for continuous oil circulation. For CLOSED CENTRE hydraulics
(e.g. JOHN DEERE) the clip must hold the valve closed so oil only
circulates when hydraulic movements are required.
Setting of distribution valve.
120mm
CLOSED CENTRE OPEN CENTRE

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Control boxes and power supply
Power requirement is 12 V DC. Note polarity!
For EC: Brown pos. (+), Blue neg. (-).
For D.A.H.: White pos. (+), Black neg. (-).
The control boxes for EC-
operating unit and for D.A.H.
are fitted in the tractor cabin at
a convenient place. See
section on Assembly for initial
mounting.
The wires must have a cross-
sectional area of at least 4.0
mm2to ensure sufficient power
supply.
For the EC-operating unit the
tractor circuit should have a 8
Amp fuse and for the D.A.H. a
16 Amp fuse.
Use the HARDI Electric distri-
bution box (No. 817925) if the
tractor has a doubtful power
supply.
Rear lights (if fitted)
Connect plug for rear lights to the tractors 7-poled socket and check
that rear lights, stop lights and turning indicators function.
Transmission shaft
When connecting the sprayer to the tractor the length of the transmis-
sion shaft should be checked and if necessary shortened. There
should be at least 20 mm free play between the male and female parts
when the shaft is horizontal.

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To ensure long life of the transmis-
sion shaft, try to avoid working
angles greater than 15°.
It is important for the
personal safety of the
operator that the
transmission shaft is
intact.
The protection guards
must cover the whole
shaft. This includes the
universal cross covers
at each end of the
shaft. The chains are
connected so that the
protection guards do
not rotate with the
shaft.
Roadworthyness
When driving on public roads and other areas where the highway code
applies, or areas where there are special rules and regulations for
marking and lights on implements, you should observe these and
equip implements accordingly.
Operating instructions
Operating of the boom
WARNING: BEFORE UNFOLDING THE BOOM IT IS IMPORTANT
THAT THE SPRAYER IS CONNECTED TO THE TRACTOR TO
PREVENT OVERBALANCING.
BE CAUTIOUS WITH INITIAL USE OF THE HYDRAULIC SYS-
TEM; IF THERE IS AIR IN THE SYSTEM THIS MAY CAUSE VIO-
LENT MOVEMENTS OF THE BOOM. THEREFORE TAKE CARE
THAT NO PERSONS OR OBJECTS ARE HURT OR DAMAGED
IN THE PROCESS OF TESTING.

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First set the tractor’s hydraulic remote
control lever in position for correct direc-
tion of oil flow.
If the boom starts to rise either switch the
hydraulic hoses around or set the control
lever in the opposite position.
Boom manoeuvering is as follows.
A. Unfolding/folding of left outer section
B. Unfolding/folding of inner section
C. Unfolding/folding of right outer section
D. Boom tilt for left side
E. Boom tilt for right side
F. Raising and lowering of boom
G. Slanting of boom
Unfolding of boom
ENSURE THAT THE BOOMS ARE CLEAR FROM THE TRANSPORT
BRACKETS BEFORE UNFOLDING.
1. Push switch Fupward to lift the boom clear of the rear transport
brackets.
2. Push switch Dand Eupward to ensure boom sections are clear of
the front transport brackets.

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3. Push switch Bupward to unfold the inner sections.
4. Push switch Aand Cupward to unfold outer sections.
5. Push switch Dand Edownward to lower right and left sections.
6. Push switch Fdownward to lower the boom to correct height above
crop or ground level.
CAUTION
The 3 upper functions, in the red rectangle with STOP sign, must only
be operated when sprayer is stationary.
Failure to do so will damage the boom.
Folding of boom
1. Raise boom Fto upper position.
2. Check the slanting function is midway G.
3. Fold outer sections, Aand C.
4. Raise right and left sections Dand E.
5. Fold inner sections B.
6. Lower boom Funtil boom rests on rear transport brackets.
7. Lower right and left boom sections until they rest the front transport
brackets Dand E.
Self-Cleaning Filter
Function diagram
1. From pump
2. To safety valve (operating pressure
is 15 bar)
3. Double filter screen
4. Guide cone
5. To operating unit
6. Replaceable restrictor
7. Return to tank
8. Nut
Choice of restrictor
It is important to have a large flow through
the filter. This is achieved by choosing the
restrictor size in relation to the liquid con-
sumption of the spray boom.
8

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4 restrictors are supplied. Use the green one (largest orifice A) first.
The hose N is unscrewed at the Self-Cleaning Filter,
the restrictor is put in the hose and the hose is
mounted again.
If the required working pressure cannot be obtained,
the restrictor is too large. Choose a smaller
restrictor.
Start with the black one, then the white and finally
the red one.
When cleaning the filter remove hose Nand the
hose at the safety valve, and check there are no
residues.
Standard filter size is 80 mesh. Sizes of 50 and 100 mesh are available
and can be changed by opening the filter top. Check the O-rings before
reassembling the filter and replace if damaged.
Adjustment of the controls
EC operating unit
1. Adjust screw for pressure equalization
2. On/off valve
3. Pressure control valve
4. Distribution valve
5. Pressure agitation valve
3
2
4

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A. Operating switch for on-off valve
V. Operating switch for distribution valves
C. Pressure regulation switch (to lower)
D. Pressure regulation switch (to raise)
1. Choose the correct nozzle size by turning the TRIPLET nozzle
bodies to the suitable nozzle for the spray purpose. Make sure that
all nozzles are the same type and capacity. See “Spray Technique”
book.
2. Open or close lever 5depending on whether pressure agitation is
required. (Remember pressure agitation takes 5% to 10% of pump
output).
3. On-off switch Ais activated against green.
4. All distribution valves switches Vare activated against green.
5. Pressure regulation switch Cis activated until emergency handle 3,
stops rotating (minimum pressure).
6. Put the tractor in neutral and adjust the P.T.O. and thereby the
number of revolutions of the pump corresponding to the intended
travelling speed.
Remember the number of revolutions on the P.T.O. must be kept
between 300-600 r/min.
7. Pressure regulation switch Dis activated till the recommended
pressure is shown on the pressure gauge.
ADJUSTMENT OF PRESSURE EQUALIZATION:
8. Close the first distribution valve switch V.
9. Turn the adjusting screw 1until the pressure gauge again shows
the same pressure.
EC remote control box

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10.Adjust the other sections of the distribution valve in the same way.
NOTE: HEREAFTER ADJUSTMENT OF PRESSURE EQUALIZATION
WILL ONLY BE NEEDED IF YOU CHANGE TO NOZZLES WITH
OTHER CAPACITIES.
11.Operating the control unit while driving:
In order to close the entire boom switch on-off Ato off position. This
returns the pump output to the tank through the return system. The
diaphragm anti-drip valves ensure instantaneous closing of all
nozzles.
In order to close one or more sections of the boom, switch the
relevant distribution valve Vto off position. The pressure equaliza-
tion ensures that the pressure does not rise in the sections which
are to remain open.
In case of power failure it is still possible to activate all functions of the
operating unit. See section “Emergency operation of the sprayer”.
When the sprayer is put aside, the control box and the multiplug must
be protected against moisture and dirt. A plastic bag may be used to
protect the multi plug.
Operation of the tank drain valve
Pull the red handle on the side of the tank to open the drain valve. The
valve is spring-loaded, but can be kept open by pulling the string out
and upwards in the V-shaped slit. To release, pull the string down-
wards and the valve will close automatically.

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If draining residues, e.g. liquid fertilizer into a
reservoir, a snap-coupler with hose can rapidly
be connected to the drain valve and the liquid
safely drained.
Spray Technique - see separate book.
Optional Extras - see separate books.
Maintenance
In order to derive full benefit from the sprayer for many years the
following few but important rules should be kept:
Cleaning the sprayer
Guidelines
Read the whole label of the chemical. Take note of any particular
instructions regarding recommended protective clothing, deactivating
agents, etc. Read the detergent and deactivating agent labels. If
cleaning procedures are given, follow them closely.
Be familiar with local legislation regarding disposal of pesticides
washings, mandatory decontamination methods, etc. Contact the
appropriate body, eg. Dept of Agriculture.
Pesticide washings can usually be sprayed out on a soakaway. This is
an area of ground that is not used for cropping. You must avoid seep-
age or run-off of residues into streams, water courses, ditches, wells,
springs, etc. The washings from the cleaning area must not enter
sewers. Drainage must lead to a soakaway.
Cleaning starts with the calibration, as a well calibrated sprayer will
ensure the minimal amount of remaining spray liquid.
It is good practice to clean the sprayer immediately after use thereby
rendering the sprayer safe and ready for the next pesticide application.
This also prolongs the life of the components.

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It is sometimes necessary to leave spray liquid in the tank for short
periods, eg. overnight, or until the weather becomes suitable for
spraying again. Unauthorized persons and animals must not have
access to the sprayer under these circumstances.
If the product applied is corrosive, it is recommended to coat all metal
parts of the sprayer before and after use with a suitable rust inhibitor.
Remember: Clean sprayers are safe sprayers.
Clean sprayers are ready for action.
Clean sprayers can not be damaged by pesticides and
their solvents.
Cleaning
1. Dilute remaining spray liquid in the tank with at least 10 parts water
and spray the liquid out in the field you have just sprayed.
NOTE: It is advisable to increase the forward speed (double if possi-
ble) and reduce the pressure.
For 4110 nozzles: 1.5 bar minimum
For 1553 nozzles: 3.0 bar minimum
2. Select and use the appropriate protective clothing. Select detergent
suitable for cleaning and suitable deactivating agents if necessary.
3. Rinse and clean sprayer and tractor externally. Use detergent if
necessary.
4. Remove tank and suction filters and clean. Be careful not to damage
the mesh. Replace cap for suction filter. Replace filters when the
sprayer is completely clean.
5. With the pump running, rinse the inside of the tank. Remember the
tank roof. Rinse and operate all components and any equipment that
has been in contact with the chemical.
Before opening the distribution valves and spraying the liquid out,
decide whether this should be done in the field again or on the
soakaway.
6. After spraying the liquid out, stop the pump and fill at least 1/5 of the
tank with clean water. Note that some chemicals require the tank to be
completely filled. Add appropriate detergent and/or deactivating agent,
eg. Washing soda or Triple ammonia.

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NOTE: If a cleaning procedure is given on the chemical label, follow it
closely.
7. Start the pump and operate all controls enabling the liquid to come
in contact with all the components. Leave the distribution valves until
last. Some detergents and deactivating agents work best if left in the
tank for a short period. Check the label.
The Self-Cleaning Filter can be flushed by removing the bypass hose
from the bottom of the filter. Stop the pump and remove the hose. Start
the pump for a few seconds to flush filter. Be careful not to loose the
restrictor nozzle.
8. Drain the tank and let pump run dry. Rinse inside of tank, again
letting the pump run dry.
9. Stop the pump. If the pesticides used have a tendency to block
nozzles and filters, remove and clean them now. Check also for
sediment on the pressure side of the safety valve for the Self-Cleaning
Filter.
10. Replace all the filters and nozzles and store the sprayer. If, from
previous experiences, it is noted that the solvents in the pesticide are
particularly aggressive, store the sprayer with the tank lid open.
NOTE: If the sprayer is cleaned with a high pressure cleaner we
recommend lubrication of the entire machine.
Filters
Clean filters ensure;
• Sprayer components such as valves, diaphragms and operating unit
are not hindered or damaged during operation.
• Nozzle blockages do not occur whilst spraying.
• Long life of pump. A blocked suction filter will result in pump cavita-
tion.

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The main filter protecting sprayer compo-
nents is the suction filter at the top of the
tank. Check it regularly.
Ensure the O-ring on filter housing is in
good condition and lubricated.
Lubrication
Recommended lubrication is shown in following tables.
Use ball bearing grease (lithium grease No.2).
NOTE: If the sprayer is cleaned with a high pressure cleaner or corro-
sive products have been sprayed out, we recommend lubrication of
all sections.
Position of the sprayer
Oil
Grease
Hours
See further details
on page:
Winter storage
12
6
9
8
7
45
6
3

1x40
2A x 12
Bx40
3x 20
4x 40
18
26
7
8
7
11
12
27
33
22
23

5x40
6x40
19
21

7
Ax 40
Bx40
8x 20
9x 40
20
23