Ford 6600 4 Cylinder Agricultural Tractor 1975–1981 Parts Manual (1/75–12/81)

Built for heavy equipment technicians and DIY owners servicing the 1975–1981 Ford 6600 4-cylinder agricultural tractor, this PDF catalog covers all mechanical, hydraulic, and electrical configurations.

• 725-page official OEM documentation featuring precise component breakdowns for the engine, chassis, transmission, and hydraulic sub-assemblies.
• Contains over 100 exploded-view diagrams, complete parts identification lists, and exact hardware specifications.
• The primary, first-edition resource for locating original Ford part numbers (P/Ns) and hardware sizes for the entire 6600 tractor series.
• Details critical sub-systems including the Dual Power transmission, turbocharger assembly, fuel injection pump, FWD transfer box, hydraulic trailer brakes, load monitor system, and the automatic pick-up hitch.
• Extensively covers the Holley carburetor, reduction gear box, power take-off (PTO), cab electrical system, air conditioner evaporator, ROPS safety frames, and the super comfort seat.

Component and Assembly Documentation

Whether you are rebuilding a transmission or simply trying to source original hardware, this manual breaks down every major sub-assembly through highly detailed figure searches. Major sections document the front wheel assemblies, rear wheel weights, and power steering gear components. You will find comprehensive mapping of the hydraulic lift systems, differential carrier parts, and the transmission handbrake linkage. The diagrams clearly illustrate the relationship between individual fasteners, seals, and structural housings, and explicitly point out variations for both the North American (NHNA) and European (NH-E) markets.

By verifying exact OEM part relationships before tearing down a machine, technicians can prevent ordering incorrect components, which directly reduces costly bay downtime. To assist with electrical and mechanical troubleshooting, the catalog provides specialized visual aids, including complete wiring diagrams alongside fuel system schematics, turbocharger assembly drawings, hydraulic lift component views, transmission gear charts, and steering gear assembly layouts.

While a parts catalog focuses on identification rather than written step-by-step procedures, these sequential layouts act as a highly accurate visual map. Seeing the precise order of snap rings, thrust washers, and seals allows DIYers to independently tackle complex tasks—such as overhauling the inline injection pump or reconstructing the reduction gear box—bypassing expensive workshop labor.

Technical Specification Previews

Beyond part numbers, the documentation provides essential technical reference data. It lists critical setup numbers, including 250 Nm clutch torque values, the 7.2-liter transmission oil capacity, and 0.05 mm differential carrier bearing clearances. Electrical ratings for the 12-volt battery system and fuel volume capacities of 3.1 gallons are also firmly documented.

Keep in mind that replacing structural or high-pressure hydraulic components carries inherent risks. Always ensure heavy equipment is properly supported and system pressure is safely relieved before starting work. This parts catalog does not replace diagnostic instructions; all service data shown is for reference, and the original OEM service manuals remain the authoritative source for hands-on repair procedures.