OPERATOR WORKLOAD ANALYSIS ON TRAILER OPERATION USING TWO WHEEL TRACTOR WITH CAGE WHEEL IN PALM OIL SOIL

The operation of the pivot trailer on flat land is more ergonomic than conventional trailers, but sloping it has never been tested. two-wheeled tractor carried out by operator uneven problems with steering handlebar which goes up and down following movement body, thus affecting increase in workload. To reduce excessive workload, necessary to design a that can be controlled easily. purpose this study was analyze ergonomics, especially operator's workload when operating two-wheel using cage wheels. towed treatment several turns, data collection uses heart rate method. results showed for (0°, 10°, 30°) respectively IRHR values 1.13, 1.15, 1.46 or work levels "Light", "Light”, “Medium”. When trailer, are 1.12, 1.39 “Light”, “Light” average energy consumption type 2.80 kcal/hour.kg-bb (kilocalories per hour weight), while 2.75 kcal/hour.kg-bb. level also influenced skills driving.