Patent ID: 7780197

Claim:
A method for changing in the field the width or track between the rear wheels and between the front wheels of an agricultural tractor having a tubular frame, which tubular frame includes telescoping tubes supporting the front wheels and extendable and retractable fore and aft to change the wheel base of the tractor, said method comprising the steps: a) extending from within the frame a telescoping tube supporting one of the rear wheels; b) extending from within the frame a telescoping tube supporting the other of the rear wheels; c) extending from within the frame a telescoping tube supporting one of the front wheels; d) extending from within the frame the other of the front wheels; e) actuating each of a plurality of hydraulic rams for exercising each of said steps of extending; f) further extending the telescoping tubes of the frame to increase the wheel base of the tractor; g) further retracting the telescoping tubes of the frame to reduce the wheel base of the tractor; and h) further actuating hydraulic rams to carry out said steps of further extending and further retracting.