The John Deere 650 and 750 Tractors Service Technical Manual (TM1242) is a comprehensive guide designed for both experienced mechanics and DIY enthusiasts. This manual provides detailed instructions and high-quality diagrams to ensure accurate and efficient repairs.

It covers a wide range of topics, from general specifications and special tools to in-depth repair procedures for each component of the tractors. You'll find detailed information on the engine, fuel and air systems, electrical system, powertrain, steering and brakes, hydraulics, and more.

**The manual is structured into sections and groups, making it easy to navigate and locate the information you need. Here's a glimpse of the content:**

**Section 10 - General** covers specifications, special tools, pre-delivery services, tune-up procedures, lubrication guidelines, and separation procedures for both the 650 and 750 models.

**Section 20 - Engine Repair** delves into the intricacies of engine components, including the valve train, cylinder head, camshaft, pistons, rods, cylinder blocks, flywheel, crankshaft, main bearings, lubrication system, and cooling system.

**Section 30 - Fuel and Repair** focuses on the air intake system, diesel fuel system, and speed control linkage, providing essential repair information.

**Section 40 - Electrical Repair** covers the charging system, starting motor, instruments and accessory circuits, and lighting circuits, enabling you to diagnose and repair electrical issues.

**Section 50 - 650 Power Train Repair** provides comprehensive instructions for the engine clutch and linkage, sliding gear transmission, rear PTO, differential, final drive, mechanical front-wheel drive, and front PTO.

**Section 55 - 750 Power Train Repair** mirrors Section 50, offering detailed repair information for the 750 model's powertrain components.

**Section 60 - Steering / Brakes Repair** covers the steering gear, power steering, and brake systems, offering step-by-step repair instructions.

**Section 70 - Hydraulic Repair** focuses on the hydraulic pump, rockshaft and implement hitches, and selective control valve, providing essential repair knowledge.

**Section 80 - Miscellaneous Repair** covers the front axle assembly, wheels, and operator station, addressing common issues in these areas.

**Section 220 - Engine Operation and Tests** provides detailed information on engine operation, system tests, and diagnosis procedures.

**Section 230 - Fuel / Air Operation and Tests** delves into the operation and diagnosis of the air intake system, diesel fuel system, and speed control linkage.

**Section 240 - Electrical Operation** covers general information, diagrams, charging system, starting circuit, instruments and accessory circuits, and lighting circuits, assisting in diagnosing and troubleshooting electrical issues.

**Section 250 - 650 Power Train Operation and Tests** provides insights into clutch and transmission operation, diagnosis of clutch, transmission, and front-wheel drive, and information on differential and final drive operation, as well as mechanical front-wheel drive operation.

**Section 255 - 750 Power Train Operation and Tests** mirrors Section 250, offering similar information and guidance for the 750 model's powertrain.

**Section 260 - Steering / Brakes Operation and Test** covers manual steering, power steering, and brake operations, including diagnosis and troubleshooting.

**Section 270 - Hydraulic Operation and Tests** provides a comprehensive overview of the hydraulic system operation, tests, and diagnosis procedures, covering the hydraulic pump, rockshaft and implement, and selective control valve.

This manual empowers you to confidently handle repairs on your John Deere 650 or 750 tractor, saving you time and money in the long run.

The John Deere 650 and 750 tractors, renowned for their robust construction and reliable performance, were manufactured by John Deere from 1983 to 1992. These versatile agricultural machines, part of the 6000 series, were designed to handle a wide range of farming tasks, from tilling and planting to harvesting and transporting. Powering these tractors were the John Deere 6.8L six-cylinder diesel engines, known for their durability and fuel efficiency. These engines, depending on the model, delivered power outputs ranging from 115 to 140 horsepower, ensuring ample strength for demanding agricultural operations. The 650 and 750 tractors were available in both two-wheel drive and four-wheel drive configurations, allowing farmers to choose the best option for their specific needs and terrain.

These tractors boasted a range of features that enhanced their practicality and operator comfort. A spacious and ergonomic cab provided a commanding view of the work area, while controls were strategically placed for intuitive operation. The 650 and 750 were equipped with powerful hydraulic systems, capable of handling a wide range of implements and attachments. The availability of a variety of transmissions, including manual and powershift options, provided farmers with the flexibility to select the transmission best suited to their workload and operating preferences. The John Deere 650 and 750 tractors, with their sturdy design, ample power, and comfortable operator environment, contributed significantly to the success of John Deere in the agricultural equipment market. Their legacy continues to be appreciated by farmers and collectors alike for their reliable performance and lasting durability.