SCH 4MPS Three-Point Linkage Mounted Sprayer 125L User Guide
- June 5, 2024
- SCH
Table of Contents
- DESCRIPTION
- 4MPS SPECIFICATIONS
- 4MPS/125 SPECIFICATIONS
- SAFETY INSTRUCTIONS
- PREPARATION FOR USE
- TROUBLESHOOTING
- MAINTENANCE
- HAND LANCE
- PARTS LIST
- CALLIBRATION
- UNDERSTANDING CALIBRATION
- TERMINOLOGY
- CALIBRATION TECHNIQUE
- MANAGEMENT TASKS
- SUPERVISORS TASKS
- A SIMPLE GUIDE TO CHEMICAL / FEED APPLICATION
- WARRANTY
- Documents / Resources
SCH 4MPS Three-Point Linkage Mounted Sprayer 125L User Guide
DESCRIPTION
This very versatile three-point linkage sprayer has an integral 12-volt diaphragm pump powered from the tractor battery. The 4MPS sprayer has a 70-litre capacity, and the 4MPS/125 has a 125-litre capacity. Both sprayers are supplied with a 4-nozzle spray boom and hand lance.
The lance is ideal for spot application of weed killers to nettles and docks. The hand lance and boom are easily changed over by means of quick release couplings.
All mounted sprayers are supplied with a 5-litre fresh water washing bottle.
4MPS SPECIFICATIONS
4MPS/125 SPECIFICATIONS
SAFETY INSTRUCTIONS
- Never leave your sprayer where someone could trip or walk into it.
- Always make sure that the sprayer is firmly fixed to the vehicle.
- Never allow people to ride on the sprayer.
- Do not use the sprayer in close proximity to other people.
- Do not inhale the chemical.
- Do not allow the chemical to come into contact with food.
- Do not smoke while operating the sprayer with chemicals.
- Do not allow the spray to contaminate rivers or ponds.
- Do not allow children to play with the sprayer.
- Do not spray on windy days.
- Do not use tar-based products.
- Always store the sprayer in a safe place.
- Wear protective clothing and eyewear when operating the sprayer.
- Test and familiarise yourself with the sprayer by using plain water.
If in doubt, please call the SCH customer help line at 01473 328272.
PREPARATION FOR USE
-
Mount the sprayer on the 3-point linkage pick-up mechanism of the tractor.
-
Make sure the centre link arm is adjusted so that the tank sits level
-
Connect the power lead to the battery (Brown to + Blue to -)
-
Choose the applicator: –
– To fit the hand lance connect it to the back delivery hose from the pump, the nozzle fitted will give a hollow cone spray
– The spray boom is fitted to the bracket at the rear of the sprayer and is held in position by a thumb screw (the nozzle should be approx.
400mm-500mm (16”-18”) above ground) -
Make sure the black delivery hose is secured firmly in place on the boom fitting
-
Commence spraying by operating the on/off toggle switch control. The pump may take time to dispense any trapped air in the system, when an even flow is achieved commence spraying.
TROUBLESHOOTING
- If the pump fails to operate: – Check the electrical connection
- If the pump fails to deliver: –
– Check suction hose is in correct position.
Check the filter head of pump is clean.
Check the ‘O’ ring on filter bowl is in position.
If the boom is fitted make sure the nozzles & filters are clear.
Check the lance handle is clean by unscrewing the brass barrel, also ensure the nozzle & filter are clear.
MAINTENANCE
- Clean the unit after use.
- Always protect the unit from frost.
HAND LANCE
PARTS LIST
Please contact us for help with spare parts.
CALLIBRATION
Calibrate as directed by the chemical manufacturers’ instructions
UNDERSTANDING CALIBRATION
The law requires some 30,00 contractors and employed persons involved in pesticide applications to obtain a Certificate of Competence.
These personnel will receive a good grounding in the safe and efficient use of pesticides. The exemption rules are such that there will be a large pool of people applying pesticides who, at best, will not have undertaken recent training. A few far-sighted employers have incurred not inconsiderable costs by including all their employers on the training courses and will more than recoup on this investment over the years in increased efficiency.
Why Calibrate?
It is now a legal requirement for all users to adhere to the label recommendations with regard to dosage rates, method of application, etc.
Besides being illegal to exceed the maximum recommended dose, getting the application rate wrong can have distinctly adverse effects on the cash flow and budgets.
Consistent overdosing of sites is not only environmentally undesirable; it also increases the risk of damage to non-target species and run- of damage in more sensitive areas. It can, even with a modest spraying programme, cost hundreds of pounds each year in wasted chemical and unnecessary losses.
Under dosing, on the other hand can be equally costly. If weeds, for example are not controlled at the first application, a second later application may be necessary. This may involve higher rates, a more expensive chemical or even hand weeding. Add to this the disruption to work schedules and it becomes evident that careful monitoring and control of all application programmes is essential.
Correct application and efficient monitoring is only possible if all personnel involved have a thorough understanding of calibration techniques.
TERMINOLOGY
Treated Area
All chemical data, whether in advisory leaflets or label recommendations, is stated in litre or kilogrammes of product per treated area. The actual area to be treated thus has to be calculated for budgeting, purchasing, job planning and calibration purposes.
Overall Application
The treated area is equal to the gross area
Band Application
The treated area is less than the gross area and is calculated thus: Band width x Band lengths x No of bands
Spot Application
The treated area is significantly less than the gross area and is calculated
thus:
Area of spot = 0.7855 x (diameter) ² (metres) (derived from πd ²) 4
Treated area (ha) = Area of spot x No of spots per ha ÷ 10,000
Quite obviously, the smaller the area that can be treated to achieve the
desired result; the less costly the operation. With the area calculated, the
variables involved can be determined in order to calibrate equipment to
complete the spraying operation in a safe and efficient manner.
Forward Speed
With overall and band applications, control of forward speed is critical in determining how much chemical is applied. This will vary with the type of terrain and must be realistically calculated. In flat terrain where unimpeded progress is possible, forward speed will be greater than in undulating, heavily vegetated conditions. In the latter, trial may be necessary to determine a constant work rate, which can be, maintained both up and downhill.
Swathe width
The width covered at each pass is known as the swathe width and will vary
with, for example, choice of nozzle, operating pressure and height of
application. Having selected the appropriate nozzle and operating pressure the
height selected must in the case of hand-held equipment be comfortable for the
operator.
Equipment is comfortable for the operator. With non-pressurised equipment,
such as CDA and gravity systems, there are obviously no operating pressures to
worry about.
Nozzle Output
Nozzle output is critical in all spraying operations and it is important to select a nozzle type appropriate to the viscosity of the concentrate being applied/swathe width required.
Flow Rate
Flow rate will vary with nozzle type, viscosity, pressure and the ambient
temperature at the time of application.
After selecting the most appropriate nozzle for the operation adjustment to
pressurise equipment will be necessary to achieve the desired flow rate. Flow
rate in powered machinery can be controlled by engine speed and/or internal
pressure adjustment.
Application Rate
Spray coverage of the target being sprayed should be sufficient to give an even application of the correct dose of pesticide on the area to be treated. The manufacturers recommendations must be followed and where there is a choice of options, i.e., high, medium, low, very low volumes, select the most appropriate volume to achieve the desired result.
Tank Dilution
From the application rate, it is possible to calculate the amount of pesticide
required per full tank.
Pesticide per fill (litres) = Tank volume (litres) x Pesticide volume
(litres/ha ÷ Diluent’s volume (litres/ha)
CALIBRATION TECHNIQUE
Having determined the above, the next step is to calibrate the actual
equipment chosen to apply the required amount of concentrate on the target
area.
Each type of application obviously has its own calibration method which must
be studied and closely followed, but in general the following notes for
spraying equipment will hold good.
It is most important to understand that each applicator will vary slightly
from others of the same type and manufacture. Thus, each piece of equipment
must be individually calibrated.
The selected nozzles should be filled with water and the correct operating
pressure selected.
The output of each nozzle should then be measured by spraying into a measuring
jug for a set period of time, e.g., one minute, to give the nozzle output in
litres/minutes.
As output will vary from nozzle to nozzle, in boom equipment the output from
each nozzle should be checked. In larger boom equipment, at least four nozzles
should be checked- one from each section and the output calculated
accordingly. If nozzle outputs on boom equipment vary by more than 5%, the
faulty nozzles should be replaced.
If output varies by a small amount from the calculated output, with some types
of equipment, altering the operating pressure can rectify this. Where the
output varies by a large amount, the calibration calculations should be re-
checked and the nozzle type changed if necessary.
With all equipment the application pattern is checked and swathe width
measured by treating an area of dry soil, concrete, etc.
Once the actual output is known, the forward speed can be calculated, in the
case of liquid sprayers,
thus: Forward speed (meters/hour) = Measured nozzle output (litres/minute) x
600,000 x (no of nozzles)
Volume rate (litres/ha) x Swathe width (meters)
The equipment can then be filled with the recommended mixture of pesticide and
dilatants. Never add
pesticide concentrate direct to an empty tank, always half-fill the tank with
dilatants prior to adding the
concentrate and mix thoroughly.
A suitable test area. e.g., A 100m strip can be sprayed at this speed. At the
end of this the actual
application rate should be determined by topping up the tank using a measuring
jug. The forward speed
can then be adjusted to ensure that the concentrate is applied at the correct
rate.
The serviceability of the equipment can be tested at the same time. Leaks are
environmentally
unacceptable and waste expensive. Blockages lead to patchy results and both
make efficient monitoring
impossible.
The full calibration process is only necessary when equipment has not been
used for a while, after
servicing or after changes in nozzles and pressure are made.
It is however, good practise to check the actual application rate at the
commencement of each days work and after lunch. Adjustments can be made as
appropriate.
Each employee will require access to a stopwatch and tape measure in order
that they can monitor their own output. If resistance is met then this is a
good indication that the employee has not understood the reasons behind the
calibration process and further training is needed.
The process can be tedious but as operators become more familiar with the
techniques, the loss in application time is reduced and more than offset by
the improved results obtained.
Much can, of course be done by management to simplify the task by the
production of job sheets clearly setting out the details of each task and
providing space for records to be kept. These when returned, can be filed and
the statutory requirement for adequate records to be kept met.
MANAGEMENT TASKS
-
Analyse the objectives of the operation
-
Select the most effective chemical to achieve these objectives
-
Check the manufacturers recommendations to ensure that it is suitable for the task and select an appropriate application rate
-
Select the most efficient equipment to apply the chemical
-
Calculate the dilution rate per tank: Pesticide per fill =
Tank volume (1) x Pesticide rate (1/ha) ÷ Dilatant’s rate (1/ha) -
Select an appropriate tank pressure for pressurised equipment
-
Select the correct nozzle to give the required swathe width
-
Calculate the gross area
-
Calculate the ACTUAL area to be treated. Overall application: Treated area = gross area Band application (ha): Treated area = Band width (m) x Band length x no of bands Width between row (m) Spot treatment (ha): Treated area = [0.7855 diam² (m)] x no spots/ha ÷ 10,000
-
Calculate an optimum forward speed based on the equipment to be used, the terrain type and the ease of movement
-
Issue comprehensive yet simple instructions to staff
-
Ensure that a record of the operation and its effectiveness is kept and any problems investigated fully
SUPERVISORS TASKS
- Read notes provided and check details
- Check weather including wind speed and re-schedule operation if unsuitable conditions prevail
- Ensure all operatives are issued with the correct safety wear, that this is serviceable and worn
- Fill the sprayer with water and set to correct pressure
- Measure nozzle flow rates using measuring jug Nozzle output (1/min) = quantity of spray in jug (ml) x 60,000 ÷ Time (sec)
- Adjust pressure to give calculated output (if possible). If significant variation from calculated output, check calibration calculations and, if necessary, change nozzles
- Spray an area of concrete or dry soil to determine the actual swathe width and for an even droplet pattern. With boom equipment ensure that the spray pattern from each nozzle overlaps correctly
- Check for leaks and blockages. Blockages should only be cleared by using compresses air and never with wire!
- Using the actual nozzle output and the actual swathe width determine the actual forward speed required to apply the correct quantity of chemical Forward speed = Nozzle output x 600,000 x No of nozzles ÷ Volume rate x swathe width
- Compare this with the optimum speed and recalculate the operation if necessary
- Fill the tank with correct quantity of concentrate / dilatants
- Mark out an appropriate test area, spray and calculate the actual application rate. Adjust the forward speed as appropriate
- Issue clear and simple instructions based on the actual output of the equipment
- Monitor the operation and ensure that regular checks on output are made
- Ensure that tank washings and surplus chemical are disposed of safely in accordance with the law
- Ensure that adequate records are maintained on the basis of the actual operating parameters
A SIMPLE GUIDE TO CHEMICAL / FEED APPLICATION
If the area to be sprayed is 3000 sq. metres. and according to the instructions of the liquid bottle you select says sufficient for 1000 sq. metres. Put 3 bottles in the tank and go over the area (north/south, east/west) until the tank is empty.
Please note that having tested your sprayer with water as advised you may not require a full tank of mixture. Therefore, adjust requirements accordingly.
WARRANTY
Your sprayer is guaranteed for 12 months from date of purchase. This guarantee covers faults which may occur from defective parts or manufacture.
This warranty only covers the sprayer for products that may be diluted with
water.
Tar based products are not recommended.
If you are missing your free brochure, contact us on 01473 328272 , email sales@schsupplies.co.uk , or visit our website www.schsupplies.co.uk
Documents / Resources
| SCH
4MPS Three-Point Linkage Mounted Sprayer
125L
[pdf] User Guide
4MPS, Three-Point Linkage, Linkage Mounted Sprayer 125L
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References
- Manufacturers and Suppliers of garden machinery | SCH Supplies
- Manufacturers and Suppliers of garden machinery | SCH Supplies
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