Technical
It is worth checking that, when the booms are folded, no hoses are under tension, which could put extra strain on connection clips and lead to leaks
”
more spray on the front of the leaf, in the direction of travel, or vice-versa if leaning forward. Adjust the tractor top-link to put the sprayer in the right position. If the sprayer is mounted on a Gator or ATV carrier machine, the mounting frame may require adjustment.
Now check that the boom is absolutely
level all the way across. In too many instances, we see ‘droopy boom syndrome’ - where one or both boom sections drop at the end. This may require mechanical adjustment or refurbishment of bushes and suspension systems to correct, but is essential to get an even spray pattern. When the boom is straight, measure from
the ground to the tip of the nozzle on the far left unit, and repeat on the far right - it should be an identical 50cm. If there is any difference, adjust the link arm height to correct. Even just one-quarter turn on the link can make several centimetres difference at the boom end. Whilst doing this, just confirm that the distance being measured is the ground to
nozzle tip, not the actual boom height. In practice, the nozzles can sit up to 10cm or more below the boom height. Whilst the Syngenta XC Nozzle has been designed to cope effectively with undulations and variability in height whilst maintaining an even spray coverage, the best results are still achieved from accurately setting up at the optimum 50cm height. Make these checks with the tractor running and the hydraulic system powered- up, otherwise, when it is switched off, the sprayer tends to sink and would give an incorrect measurement compared to when working. Now we need to look at the operation of
the sprayer. Fill the tank at least half full with clean water and, in the designated sprayer- testing or cleaning area, switch on the nozzles and high pressure test to at least five bar output. Visually check all the hoses and joints for any signs of leaks. Reduce the pressure to a normal operating
level of three bar and watch the pressure gauge. If the needle is fluttering, the most
Link arm adjustment PC AUGUST/SEPTEMBER 2014 I 131 Top link adjustment
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