John Deere JD300 Tractor Repair Technical Manual (SM2073)

Table of Content
Description and Specifications .
Tractor Separation
Periodic Lubrication
Engine Tune-Up and Tractor Adjustment
Basic Engine
Engine Lubrication System
Governor and Speed Control Linkage
Engine Cooling System
Fuel Systems
Electrical System
Engine and PTO Clutches
Transmission and Differential
Hi-Lo Shift Unit
Continuous-Running PTO
Transmission-Driven PTO
Independent PTO
Reverser
Final Drive System
Hydraulic Brakes
Manual Steering
Power Steering {Open Center Type)
Power Steering (Closed Center Type)
Front Axles, Front End Support, and Steering Linkage
Seats
Hydraulic System
Hydraulic Pumps
Rockshaft and 3- Point Hitch
Remote Cylinder Selective Control Valve
Balanced Poppet Selective Control Valve
Hose Couplers and Remote Cylinders
Wheels, Tires, and Weights
Trouble Shooting
Special Service Tools
This service manual contains maintenance instructions for John Deere JD300 Tractor. Included are complete instructions for removal, disassembly, inspection, repair, assembly, and installation of major parts and assemblies of the tractor.
In addition, this manual contains brief descriptions of the more complicated systems of the tractor, and tells how they operate. Tests and adjustments, required to keep the tractor operating efficiently, are explained in detail.
In Section 20, “Specifications,” dimensions of many new wearing parts are given as an aid in determining when parts replacement is necessary.
A section on ” Tune-Up and Adjustment” contains instructions for performing the services necessary to help the tractor perform efficiently and economically after it has been in the field for some time.
This manual was planned and written for the Service Department; its place is in the shop. Use the manual whenever in doubt about correct maintenance procedures. Use it as a text book for training new Service Department personnel who are unfamiliar with John Deere Tractor.
Daily use of this as a guide in overcoming service problems will reduce error and costly delay to a minimum and as-sure you the best in finished service work. In many instances your customer’s confidence in your work will be improved when he sees you using the Service Manual. He knows you are following approved maintenance procedures and making proper adjustments. There is no guess-work when you use the manual.