Controls for Forestry Log Loaders - System A (Adopted ISO 3789-4:1989)
This part of ISO 3789 forms one of a series covering location and method of operation of operator controls for tractors and machinery for agriculture and forestry, powered lawn and garden equipment, the series currently consisting of the parts listed in the Foreword.
This part of ISO 3789 specifies the operational pattern for log loader controls. Two alternative two-lever systems are specified: see clause 3.
It applies to two-lever control systems for grapple-type log loaders used in mobile and self-propelled, specially designed forestry machines as described in ISO 6814.