Under pressure to prevent compaction
t On-board tyre pressure adjustment has been fitted to a demonstration trailer belonging to HM Trailers this harvest, to gauge user reaction. u Gauges display target and actual pressure.
unloaded into road-going trailers on the headland, but this is an expensive option and makes moving between fields complex. It works for cereals, but is less suitable for root crops such as sugar beet and it is usually the root crop harvest as well as maize harvesting during autumn and winter months when conditions tend to be wetter and soil structure damage is more likely.
Most users never achieve full benefit from their high performance modern tyres, having to compromise between the low pressures preferred, and higher pressures needed for the road. David Williams visited a trailer manufacturer with a solution.
Maximise tyre performance
Essex-based HM Trailers started offering built-in central tyre pressure adjustment as an option in 2016, responding to demand from salad crop producers for soil-friendly for fieldwork can’t be achieved in trailers to transport crops from As average trailer sizes and weights reality, as they would be unsuitable the field in all weathers. “It was have increased, tyre technology for higher transport speeds to the so successful that we decided to has more than kept up, offering store. promote it for additional agricultural operation at very low pressures while One solution is using a chaser applications,” explained director carrying heavy loads. Spreading bin during harvest. Operating on Grant Perry. “Modern tyres offer weight over a larger surface area large tyres at low pressures, these fantastic performance but their reduces rutting and compaction usually remain in the field carting limiting factor is always that but usually a compromise has to be the crop from the harvester to be pressures have to be adjusted made, as the low pressures possible for different loads and speeds. Central tyre inflation allows optimal pressures to be set and adjusted, anywhere, from the tractor cab.” Grant offers two system types; digital dual line and analogue single line. Dual line offers the advantage that if one tyre develops a fault, the valve can be isolated so the other three tyres remain inflated whereas single line means all tyres operate at To discuss your business finance options, please contact either: identical pressure and if a fault occurs in one, then it must be isolated David Booth 07800 551241 email@example.com manually. Single line allows much Rob Gaffer 07967 812897 firstname.lastname@example.org VAT Number faster adjustment though, making it ideal for rapid cycles between Tyre pressures can be adjusted on the move. Low pressure for low speed, fieldwork transport and field. protects the soil from compaction but within just 20 seconds the tyres can be inflated from 15–50psi for high speed roadwork. Pressure control is electronic,
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through a cab-mounted switch box and the operator has only to select transport or field mode. Pressures for each are adjusted using the drawbar mounted pressure controller which has two pressure gauges; displaying actual and target tyre pressures. Air to inflate is from the tractor braking system, with a priority valve ensuring trailer braking isn’t affected. Because most tractor compressors are relatively small, air tanks mounted on the trailer chassis provide a reservoir, allowing large flotation tyres to be inflated from field to transport pressures in approximately 20 seconds. Deflation is even faster with air released to the atmosphere. As soon as the air storage tank pressure drops, air is immediately supplied from the tractor to recharge the tanks ready to inflate the tyres, with full capacity typically achieved within 10 minutes.
Great Farm testedService For the 2017 harvest HM Trailers Authorised regulated equipped one ofand its demonstration the Financial Conduct trailersbywith a single-line inflation Authority FRN672386 system and lent it to farmers locally 239269966 Reg Nointerest. 08299142 who have expressed Farmers Guide visited Bishops Stortford-based Will Streeter trading continued over...
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Great Service Authorised and regulated by the Financial Conduct Authority FRN672386
VAT Number 239269966
Reg No 08299142
38 www.farmersguide.co.uk October 2017
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