George Baxter, agronomist at Hutchinsons, has provided steps to help growers setup their sprayers ahead of spring applications.
Do a visual inspection
He says that a visual inspection of all components, for both cleanliness and condition, should be the first step.
“The whole machine has to be fit for purpose, so look at everything from the hitching and steering points on a trailed or mounted sprayer, to the tank, filters, hoses, and electrics. Perishable rubber components, such as Drip Control Valves, and water ingress into electrical solenoid valves can be a particular problems areas to watch.”
It’s also important to check PTO guards, beacons, work lights and tyres, and the boom should be unfolded so that the condition of the joints, hydraulic rams, and pivots can be examined.
Check tyre pressures
Running at the correct tyre pressures will aid with boom stability and minimise ground compaction, George adds.
“Although many sprayers have self-levelling systems, these can be put under greater strain if tyre pressures are uneven. Don’t forget to also check the tractor tyre pressures if you are using a mounted sprayer.
“The optimum pressure depends on several factors, such as tyre type and size, machine weight, and the amount of field and roadwork to be done, so a compromise may be needed. Refer to tyre manufacturer recommendations or speak to a representative about optimum pressures.”
Ensure that tanks are empty and clean
While the sprayer should have been cleaned after the previous season, there’s no harm in washing out the machine with clean water as this enables growers to check for leaks.
Some products also require a specific cleaner, and these will be worth it, especially if there is concern about potential sulfonylurea residues on sensitive crops.
“Remember, all washings must be disposed of correctly, which can be quite complex in the absence of a designated washdown area and biobed system, so seek advice or speak to your agronomist if you are in any doubt.”
When checking for leaks, the sprayer should be run at 5bar and if no leaks are seen, the machine should be pressurised up to operational conditions to check readings.
Test the nozzles
He adds that it’s important to check nozzles for damage and ensure that they are within the tolerance for the desired application rates.
“Take this opportunity to evaluate whether current nozzles are delivering the coverage you need to get the most from products. Recent years have seen an industry trend towards lower water volumes to improve work rates, but there is a risk this could be compromising coverage and efficacy in some situations.
“Again, it’s a complex area, so discuss the options for nozzle choice and water volume with your agronomist.”
Check PPE and first aid
It’s vital that operators have access to the correct PPE and a full first aid kit, with eyewash. This should include a face mask, gloves and overalls at a minimum.
“Also consider things like a spill kit, fire extinguisher, signage, and an action plan/emergency contact numbers in the event of an accident,” he says.
“Taking a bit of time to make sure everything is in good working order before the season gets going can help to reduce the risks of downtime once things get busy. With relatively narrow windows to apply products at the optimum stage, anything we can do to avoid lost time and keep sprayers working properly has to be worthwhile.”