Efficiency of Field Equipment by Service Recorder (2)

Factors of Travel, Service, Idle Time

Abstract

The operating hours of the tractor work are classified into the in-the-field (pure operation) time and the off-the-field time, which includes the travel, the service, the idle and delay time. This paper discusses the factors of the off-the-field time and their potential time. The results are as follows:
1) The presumed value of the travel time is influenced by the travel speed, the number of field and the number of operating implements in a day. The attainable travel speed is nearly the same as the maximum tractor speed on the paved road, and is from 3 to 5m/sec on the farm road. Because of stops and turning, operator comfort, and other delay factors, it is impossible to maintain the attainable speed. The speed factors for converting the attainable speed to average speed are from 0.85 to 1.0 on the paved road and 0.65 to 0.85 on the farm road.
2) The service time is influenced by the daily service time and the implement arrengement time in the field. The daily service time which includes the time of preventive maintenance for the tractor and implement and that of mounting or dismounting of implement on the tractor, takes place after the lunch and before and after the operation. The values of them show great diffeence between the systems. (Table 1)
3) The idle or delay time was classified into the time at changing of work and that during the work. As the former is shorter than the latter, it is important to take scheduled rest time and to stop the idle or delay time during the work. (Table 2)