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Designing effectively entails disciplined methodology in the treatment and analysis of information. Being knowledgeable and inquisitive of product background and requirements and applying sound design techniques till help assure success in the design of transmission elements.

The text to follow is intended to supplement the machine design background of the reader with the hope that he will benefit from the references given and further his interest in deeper exploration of agricultural transmission design parameters. Texts such as Heldt(1)*, Barger(2), and Looman(3), and others will be useful in the establishing design details.

The scope of this paper covers the design of the components or elements that collectively constitute the working parts of a transmission. The selection of the proper transmission for a given application is a subject in itself and will have only brief comment. Customer and manufacturing requirements are involved.

Basic transmission function can be depicted in a flow diagram as shown in Fig. 1. Speed ratio is selected by the operator through manipulation of gear shift and clutch controls. The operator's satisfaction with the transmission function depends on design and execution detail.

A design criteria satisfying requirements established through evaluation, test, and simulation techniques has greater chances for success than one of unique design concept created prior to the establishment of objectives or design specification. Or in other words, transmission functional and operational characteristics needed to enhance in-field and transport vehicle performance should be identified early in a transmission engineering program with several of the more important considerations being:

Engine Input