Abstract
ABSTRACT FIELD data was collected on the repair costs of forage harvesters and rotary mowers; and additional data was obtained on the reliability of silage mechanization systems. The results indicate that, in general, the repair costs of forage harvesters are higher than previous estimates. For example, it was found that a double chop forage harvester, with an accumulated use of 1000 ha, has a total repair cost bill of 83% of the capital cost of the machine, compared with the nearest literature estimate of approximately 67%. In addition, results indicate that self-propelled harvesters are more reliable than trailed units, when compared on an accumulated use basis. For example, the total number of breakdown hours, during the first 1000 ha of use, are 250 and 180 for trailed and self-propelled harvesters, respectively.
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