This comprehensive John Deere 4640, 4840 Tractors Service Repair Technical Manual (TM1183) provides detailed instructions and diagrams for every aspect of your tractor's repair and maintenance. Designed for both experienced mechanics and DIY enthusiasts, this manual serves as an essential resource for keeping your tractor in top working condition.

The manual covers a wide range of topics, including:

**Engine Repair:** Detailed information on cylinder head, valves, camshaft, cylinder block, liners, pistons, rods, crankshaft, main bearings, flywheel, lubrication system, and cooling system.

**Fuel and Air Repair:** Instructions on air intake system, diesel fuel system, and control linkage.

**Electrical Repair:** Covers harness replacement, charging circuit, starting circuit, lighting circuits, instrument and accessory circuits, and power front-wheel drive.

**Power Train Repair:** Provides comprehensive information on Perma-Clutch, Quad-Range Planetary, Quad-Range Transmission, Power Shift Transmission, Power Take-Off, Differential, Final Drive, and Power Front-Wheel Drive.

**Steering/Brakes Repair:** Covers power steering and power brakes.

**Hydraulic Repair:** Offers detailed instructions on miscellaneous hydraulic components, hydraulic pump, rockshaft and implement hitches, selective control valve, and remote cylinder.

**Miscellaneous:** Includes information on front axles and wheels.

**Operator Station Repair:** Provides guidance on the air conditioning system, heating system, seat, and miscellaneous components.

**Engine Operation and Tests:** Explains system operation and provides diagnostic tests.

**Fuel / Air Operation and Tests:** Covers the air intake system, diesel fuel system, and control linkage operation and tests.

**Electrical Operation and Tests:** Includes general information, diagrams, and tests for charging circuit, starting circuit, lighting circuit, instrument and accessory circuits, power front-wheel drive, and electrical remote control and outlet socket.

**Power Train Operation and Tests:** Covers Quad-Range system operation and tests, Power Shift system operation and tests, differential and final drive, and power front-wheel drive.

**Steering / Brakes Operation and Tests:** Provides information on power steering and power brakes operation and tests.

**Hydraulic Operation and Tests:** Explains hydraulic system operation and tests, miscellaneous hydraulic components, hydraulic pumps, rockshaft and implement hitches, selective control valve, and remote cylinder.

**Operator Station Operation and Tests:** Covers the air conditioning system, heating system, and their operation and tests.

This manual is a valuable investment that will save you time, money, and frustration in the long run. With its comprehensive information and easy-to-follow instructions, you will have everything you need to keep your John Deere 4640 or 4840 tractor running smoothly.

The John Deere 4640 and 4840 tractors, both released in the early 1980s, represented a significant step forward in agricultural technology. These powerful machines were equipped with the renowned John Deere PowerTech 6-cylinder diesel engines, delivering impressive performance with their 135 and 160 horsepower outputs, respectively. The 4640 and 4840 were designed for a wide range of agricultural tasks, from plowing and cultivating to harvesting and hay baling. Their robust construction, featuring a heavy-duty frame and axles, ensured durability and reliability even under demanding conditions. These tractors also incorporated advanced features like power steering, a comfortable operator station with an adjustable seat, and a comprehensive instrumentation panel for easy monitoring of key engine and machine functions.

The John Deere 4640 and 4840 tractors garnered popularity due to their versatility, fuel efficiency, and ease of operation. The availability of a wide array of optional attachments and implements further enhanced their functionality, enabling them to adapt to various farming needs. While these tractors are now considered vintage, they continue to be sought after by collectors and farmers who appreciate their robust build, dependability, and classic design. The TM1183 Service Technical Manual provides comprehensive information on the maintenance, repair, and troubleshooting of these machines, ensuring that they can continue to serve their owners effectively for many years to come. Its detailed diagrams, step-by-step instructions, and comprehensive parts list make it an invaluable resource for anyone involved in keeping these John Deere classics running smoothly.