High torque gearbox for tractor - with group gear box directly coupled to main box with high or low speed selector

摘要

The main gear box has a group gear box coupled to it with the layshaft/output shaft of the main gear box in parallel to the layshaft/input shaft of the group gear box. The input shaft of the group box is selectively driven direct from gears on the drive shaft of the main box, in a reverse mode, and selectively directly from a gear on the layshaft of the main box in the forward mode, with the group selector for high/low speeds. The system provides a large speed range in both forward and reverse for ploughing and working.