Reducing harvester fire risk a priority for grain growers
Reducing the potential for combine harvester fires should be front of mind for all grain growers and contractors as they embark on reaping this year’s crops.
The Grains Research and Development Corporation (GRDC) and farm machinery safety authorities are reminding harvester operators to implement fire prevention and safety measures and exercise caution over the coming months. They say Australian broad acre harvest conditions in some seasons are arguably the most hazardous in the world for fires.
Internationally-recognised agricultural engineer and harvester expert, Dr Graeme Quick, says the most common cause of harvester fires is in the engine bay, where material can collect on hot components such as the exhaust manifold and turbocharger.
“Crop materials collecting or clumping on hot components can ignite, then embers can drop down or are blown around the machine and into the crop to cause smouldering and spot fires,” said Dr Quick, who has investigated combine harvester fires over the past two seasons.
Supported in his research by the GRDC, Dr Quick said the key to avoiding harvester fires was diligence in clean down and inspection, and postponing paddock work during periods of extreme fire risk: low humidity, high winds and vulnerable crop conditions.
“Suitable equipment and operator diligence in a fire-prone environment is critical, and this calls for systematic preparation and prevention procedures.
“Preventative and precautionary measures are essential in limiting the fire risk.”Dr Quick said all operators should equip their machines with at least two fire extinguishers. A high capacity air compressor with air lances should be on board or at hand.
“Regular blowdowns are essential and in the worst conditions a blowdown may be needed as frequently as every half hour, or on each bin round.”
Dr Quick canvassed professional advice and industry opinions in Australia and the United States about combine fires, before investigating harvester fire incidents in southern Queensland, northern New South Wales and on the Yorke Peninsula in South Australia.
From his research, Dr Quick said apart from the engine bay, other causes of harvester fires included failed bearings or brake problems, electrical faults, fluid leaks and rock strikes.
“Incidentally, the evidence does not support static electricity as a prime cause of harvester fires, so that's another reason for extreme care in harvester hygiene.”
The above checklist has been developed by Dr Graeme Quick and endorsed by the Grains Research and Development Corporation
Caption: Dr Graeme Quick was engaged by the GRDC to look at the causes of combine harvester fires.
Dr Graeme Quick
07 5494 9920
0409 675 100
Region National, North