This comprehensive John Deere 1640, 1840, 2040, and 2040S Tractors Service Manual (TM4363) provides detailed instructions and diagrams to guide you through every aspect of servicing and repairing these tractors. The manual is designed for both the experienced mechanic and the do-it-yourself enthusiast, offering step-by-step instructions and highly detailed exploded views to ensure accurate and efficient repairs.

Covering all aspects of your tractor, from general specifications and pre-delivery inspections to engine, fuel system, electrical components, powertrain, steering, braking, and hydraulic systems, this manual is your essential resource for keeping your tractor running smoothly. You'll find detailed sections dedicated to:

* **General Specifications and Special Tools:** Learn about the tractor's specifications, including dimensions, weights, and capacities. Discover the special tools required for specific repair tasks.
* **Predelivery, Delivery, and After-Sales Inspections:** Understand the procedures for inspecting your tractor before and after delivery.
* **Lubrication and Periodic Service:** Maintain your tractor's peak performance with comprehensive lubrication and periodic service schedules.
* **Engine and Tractor Tune-Up:** Perform necessary adjustments and tune-ups to optimize your tractor's engine performance.
* **Tractor Separation (Tractors Without Increased Lifting Capacity and Tractors With Increased Lifting Capacity):** Learn the procedures for separating the tractor into its major components for repair and maintenance.
* **Engine:** Detailed information on the engine, including specifications, radiator maintenance, and troubleshooting.
* **Fuel and Air Intake System:** Comprehensive coverage of the fuel and air intake system, including diagnosing malfunctions, servicing the fuel tank and water trap, and troubleshooting cold weather starting issues.
* **Electrical System:** Navigate the electrical system with in-depth coverage of specifications, diagnosing malfunctions, wiring harnesses, controls and instruments, lighting systems, wiring diagrams, the starting motor, and the alternator.
* **Power Train:** Understand the complexities of your tractor's power train, including specifications, operation, lubrication systems, clutch linkages, engine clutches, hi-lo shift unit, creeper transmission, transmission shift linkage, synchronized transmission and transmission oil pump, collar shift transmission and transmission oil pump, differential, final drive, independent PTO, continuous-running PTO, front PTO, and mechanical front wheel drive.
* **Steering Systems and Brakes:** Master the operation and maintenance of your tractor's steering systems and brakes, including hydrostatic steering systems, power steering, manual steering, and brakes.
* **Hydraulic System:** Explore the hydraulic system in detail, including specifications, diagnosing malfunctions, pressure tests, the oil reservoir, filter, valves, oil cooler, hydraulic pumps, rockshaft, front hitch, selective control valves, hose couplers, remote cylinder, and selective control valves for tractors manufactured in Spain.
* **Miscellaneous:** Find information on front axle maintenance, belt pulley servicing, front and rear wheel maintenance, and axle trailer hitch.
* **Operator's Cab:** Learn about the operator's cab features, including the air conditioning system, cab ventilation and heating, operator's seats, OPU cab, SG2 cab, and roll guard.

The John Deere 1640, 1840, 2040, and 2040S tractors were a series of popular and reliable agricultural workhorses manufactured by John Deere from 1975 to 1982. These tractors were known for their durability, versatility, and powerful engines, making them suitable for a wide range of farming tasks. The 1640, 1840, and 2040 models were all powered by John Deere's 6-cylinder, naturally aspirated, diesel engines. The 1640 featured a 100-horsepower engine, while the 1840 boasted 120 horsepower. The 2040 model came with a 140-horsepower engine, providing ample power for heavier duties. The 2040S, introduced in 1976 as a slightly upgraded version of the 2040, featured the same engine but with a turbocharger, boosting output to 160 horsepower for even greater performance. These tractors were equipped with a variety of transmissions, including the Powershift and the Syncro-Range, allowing operators to select the optimal gear for various operating conditions. The 1640, 1840, and 2040 models also featured a standard three-point hitch, making it easy to attach and operate a wide range of implements, including plows, cultivators, and mowers.

These John Deere tractors were designed with operator comfort and convenience in mind. The spacious cab offered excellent visibility, while the controls were laid out ergonomically for easy access. These machines were also equipped with a variety of features to enhance safety, including a roll-over protection system (ROPS) and an operator's manual providing guidance on safe operation and maintenance practices. The John Deere 1640, 1840, 2040, and 2040S tractors were instrumental in helping farmers achieve increased productivity and efficiency during their production years. These machines are still considered valuable additions to many farms and continue to be sought after by collectors and enthusiasts. The TM4363 service manual provides detailed information on troubleshooting, maintenance, and repair procedures, making it an essential resource for owners and operators who wish to keep these tractors running at optimal performance.