This comprehensive Technical Manual is your go-to resource for maintaining, assembling, disassembling, and servicing your John Deere 1166, 1169H, 1174, 1177, 1177 Hydro/4, 1188, and 1188 Hydro/4 Combines. This manual provides in-depth information and data specific to these models, making it an invaluable tool for diagnosing, repairing, and maintaining your John Deere machinery.

The manual is packed with detailed specifications, diagrams, and clear, real-life photographic illustrations, ensuring you have a visual understanding of each component and procedure. It covers a wide range of topics, including:

**General Information:** Discover essential specifications for your combine, providing a foundational understanding of its design and operation.

**Engine Repair:** Dive into detailed instructions for engine maintenance, including pulley removal, engine removal procedures for both 6466 and 6359 engines, and a comprehensive guide to the cooling system.

**Fuel System:** This section explores the intricacies of the fuel system, covering components like fuel system components and speed control and engine shut-off mechanisms.

**Electrical Equipment Repair:** Gain a thorough understanding of the electrical system, covering connectors, electrical system components, low shaft speed monitor system, harvest performance monitor, electromagnetic transmission brake, starting motor (John Deere and Bosch), alternator, Dial-A-Matic, and sidehill leveling system.

**Power Train:** Explore the power train in detail, including the variable ground speed drive, Posi-Torq ground drive (both upper and lower units), clutch operating assembly, engine clutch, hydrostatic drive (including oil and filter change for both Sauer and Eaton systems), variable pump (Sauer and Eaton), fixed-displacement motor (Sauer and Eaton), hydrostatic drive oil cooler, transmission with differential, final drives (standard, rice combine, and sidehill combine).

**Brakes, Rear Axle, and Steering:** This section covers the parking brake, brake operating assembly, foot brakes (internal and external slave cylinders, and sidehill combine), hydrostatic steering, rear axle (standard and sidehill combine).

**Hydraulic System:** Discover the workings of the hydraulic system, including hydraulic lines, dual and triple hydraulic pumps, mechanical four-spool and seven-spool control valves, leveling system control valve, electro-magnetic control valve, hydraulic cylinders, hydraulic reverser motor, hydrostatic reel drive, and hydraulic accumulator/header pressure gauge.

**Miscellaneous:** This section covers essential components such as bearings and shafts, drive belts, and drive chains.

**Operator's Platform with Cab:** This section covers the cab ventilation system, refrigerant handling, air conditioning system service (including compressor and system components, and integrated condenser cooling), cab heating system, operator's cab, platform control levers, steering column, and operator's seat.

**Cutting Platforms and Corn Heads:** Refer to Technical Manual for Harvesting Units (TM-4468) for detailed information on these components.

**Feeder House:** Explore the feeder house drive, feeder house, chain transmission cutting platform drive, and hydraulic reverser.

**Separator and Cleaning Unit:** This section covers the separator drive, beater, variable cylinder drive (upper and lower units, and mechanically adjustable), cylinder drive reduction gear, threshing cylinder, concave, straw walkers, cross shaker, fan (including variable fan drive), and cleaning shoe with sieves.

**Elevators, Grain Tank, and Unloading Augers:** This section covers the tailings auger and elevator, and clean grain auger and elevator.

**Special Equipment:** This section covers the straw chopper countershaft, straw chopper, and straw spreader.

**Engine Cooling System Operation:** This section explores the operation of the cooling system.

**Fuel and Air Intake System Operation:** Gain a deeper understanding of the air intake system and the fuel system.

**Electrical System - Operation and Tests:** This section covers general information, circuit plan, wiring diagram and wiring harnesses, circuit testing, checking individual components, electro-magnetic control valve, speed monitor system, harvest performance monitor, starting motor, alternator, and Dial-A-Matic header height control.

**Power Train - Operation and Tests:** This section covers the Posi-Torq ground drive, clutch operating assembly, clutch, hydrostatic ground speed drive, testing hydrostatic drive (Sauer and Eaton), and transmission.

**Brakes, Steering, and Rear Axle - Operation and Tests:** This section covers full and partial disk brakes, hydrostatic steering (including diagnosing malfunctions and testing), and testing hydrostatic steering

**Hydraulic System - Operation and Tests:** This section covers hydraulic circuits, mechanical four-spool and seven-spool control valves, electro-magnetic control valve, and testing the hydraulic system.

**Operator's Platform and Cab - Operation and Tests:** This section covers the operation and testing of the cab ventilation system, air conditioning system (operation and tests).

This manual is comprehensive, detailed, and easy to navigate, making it a valuable resource for experienced mechanics and DIY enthusiasts alike.

The John Deere 1166, 1169H, 1174, 1177, 1177 Hydro/4, 1188, and 1188 Hydro/4 combines were a series of powerful and versatile agricultural machines produced by John Deere in the late 1970s and 1980s. These combines were designed for large-scale grain harvesting operations, offering efficient and reliable performance across a wide range of crop types. The series featured a range of engine options, including the 6-cylinder John Deere 646 and 649 engines, providing ample power for demanding harvesting conditions. The combines also incorporated advanced features like a hydraulically driven feeder house, a variable-speed threshing system, and a large grain tank capacity. The Hydro/4 models further enhanced productivity with their four-wheel drive and hydrostatic transmission, allowing for smoother operation in challenging terrain.

Beyond their robust construction and technological advancements, these combines also emphasized operator comfort and ease of use. The spacious cabs provided excellent visibility and ergonomic controls, contributing to reduced operator fatigue during long working hours. The machines were also designed with accessibility in mind, simplifying maintenance procedures and minimizing downtime. These factors, combined with their impressive performance capabilities, established the John Deere 1166 series as a benchmark for agricultural innovation, earning them a reputation for reliability and efficiency among farmers and agricultural professionals. Their legacy continues to influence the design and development of modern combines, highlighting the lasting impact of these machines on the agricultural landscape.