SAE TECHNICAL PAPER SERIES 932420 New Future-Oriented Tractor Transmissions from ZF Franz Mtiller and Hubert Sailer ZF Friedrichshafen AG f The Engineering Society For Advancing Mobility r Land Sea Air and Space@ INTERNATIONAL 1993 International Off-Highway & Powerplant Congress & Exposition Milwaukee, Wisconsin September 13-15,1993 400 Commonwealth Drive, Warrendale, PA 15096-0001 U.S.A. Tel: (412)776-4841 Fax:(412)776-5760 Downloaded from SAE International by University of Auckland, Saturday, September 29, 2018The appearance of the ISSN code at the bottom of this page indicates SAE's consent that copies of the paper may be made for personal or internal use of specific clients. This consent is given on the condition, however, that the copierpay a $5.00 per article copy fee through the Copyright Clearance Center, Inc. Operations Center, 27 Congress St., Salem, MA 01970 for copying beyond that permitted by Sections 107 or 108 of the U.S. Copyright Law. This consent does not extend to other kinds of copying such as copying for general distribution, for advertising or promotional purposes, for creating new collective works, or for resale. SAE routinely stocks printed papers for a period of three years following date of publication. Direct your orders to SAE Customer Sales and Satisfaction Depart­ ment. Quantity reprint rates can be obtained from the Customer Sales and Satisfaction Department. To request permission to reprint a technical paper or permission to use copyrighted SAE publications in other works, contact the SAE Publications Group. GLOBAL MOBILITY DATABASE AH SAE papers, standards, and selected books are abstracted and indexed in the SAE Global Mobility Database, No part of this publication may by reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. ISSN 0148-7191 Copyright 1993 Society of Automotive Engineers, Inc. Positions and opinions advanced in this paper are those of the author(s) and not necessarily those of SAE. The author is solely responsible for the content of the paper. A process is available by which discussions will be printed with the paper if it is published in SAE transactions. For permission to publish this paper in full or in part, contact the SAE Publications Group. Persons wishing to submit papers to be considered for presentation or publication through SAE should send the manuscript or a 300 word abstract of a proposed manuscript to: Secretary, Engineering Activity Board, SAE. Printed in USA 90-1203B/PG Downloaded from SAE International by University of Auckland, Saturday, September 29, 2018932420 ABSTRACT A new series of tractor transaxles (transmissions + rear axles) has been developed by ZF Friedrichshafen for the changed economic farming structures in the future. These transaxles feature market-demanded optimized functions combining powershift and electronic components for all 3 tractor main applications: • working in the field • on-road use • loader work The development program criteria emphasized high economy for the user and excellent operating comfort. This paper gives an overview about the transaxle range structure and describes in detail the transmission concept, functions and features based on the transmission type T 7300. In addition, it provides information about the potential for upgrading. INTRODUCTION ECONOMIC BACKGROUND - The dominant trend in Western Europe farming is the continuous New Future-Oriented Tractor Transmissions from ZF Franz Muller and Hubert Sailer ZF Friedrichshafen AG reduction in the number of farms. In future, medium-sized farms will often prove to be too small for full-time farming. On the other hand, they will be too large for part-time operation. This means that there will be a disproportionate decrease in the number of medium-sized farms. Large farms usually then lease this land as it becomes avail