2 Model 2120 Tractor TM-4252 (Dec-70) INTRODUCTION Use FOS Manuals for Reference Use Technical Manuals for Actual Service This technical manual is part of a twin concept of service: FOS Manuals for reference Technical Manuals for actual service Some features of this technical manual: Table of contents at front of whole Manual. Contents at front of each Section Specifications at end of each Group Special tools at end of each Group The two kinds of manuals work as a team to give you both the general background and technical details of shop service.
Fundamentals of Service (FOS) Manuals cover basic theory of operation, fundamentals of trouble shooting, general maintenance, and basic types of failures and their causes. FOS Manuals are for training new men and for reference by experienced men. This technical manual was planned and written for you a journeyman mechanic. Keep it in a permanent binder in the shop where it is handy. Refer to it whenever in doubt about correct service procedures or specifications. Using the technical manual as a guide will reduce error and costly delay. It will also assure you the best in finished service work. Technical Manuals are concise service guides for a specific machine.
Technical Manuals are on-the-job guides containing only the vital information needed by a journeyman mechanic. When a serviceman should refer to a FOS Manual for more information, a FOS symbol like the one at the left is used in the TM to indentify the reference. Printed in Germany