Ford 6640

Last Updated: June 2024

Overview

The Ford 6640 is a versatile utility tractor from the PowerStar 40 series, produced by Ford in Basildon, England between 1991 and 1995. It operates with a 5.0 L Ford Genesis four-cylinder diesel engine and offers a variety of transmission types suitable for different tasks and conditions. Depending on the variant, the tractor can feature mechanical or hydraulic wet disc brakes, as well as different types of steering and hitch systems. Its large fuel tank and high lift capacity make it a practical choice for various agricultural tasks. The Ford 6640 is distinguished by its relatively high horsepower output and torque, allowing for effective and efficient work.

Key Specifications

Category: Utility

Power Output: 90.7 hp

Transmission: Multiple Types Available: Constant mesh with dry disc clutch (EconoShift), Two-speed power shift with dry disc clutch (Dual Power), Synchronized with dry disc clutch (SynchroShift), Four-speed power shift with wet disc clutch (ElectroShift/Pulse Command)

Operating Weight: 8,135 lbs (4WD ROPS)

Fuel Type: Diesel

Lift Capacity: 4,200 - 6,565 lbs (depending on model)

Ford 6640 vs. Similar Tractors

Power Output

Above Average

Greater than 77% of similar tractors.

Operating Weight

Poor

Greater than 4% of similar tractors.

Technical Specifications

Engine

Manufacturer: Ford
Model: Genesis
Cooling Type: Liquid-cooled
Cylinder Orientation: Inline
Valve Configuration: -
Fuel Type: Diesel
Induction Type: Natural Aspiration
Cylinders: 4
Displacement (ci): 304 ci
Bore (in): 4.41 in
Stroke (in): 5 in
Rated RPM: 2200 RPM
Power Output (hp): 90.7 hp

Transmission

Type: Multiple Types Available: Constant mesh with dry disc clutch (EconoShift), Two-speed power shift with dry disc clutch (Dual Power), Synchronized with dry disc clutch (SynchroShift), Four-speed power shift with wet disc clutch (ElectroShift/Pulse Command)
Forward Gears: Multiple: 8 (EconoShift), 16 (Dual Power), 12 (SynchroShift), 16 (ElectroShift)
Reverse Gears: Multiple: 2 (EconoShift), 4 (Dual Power), 12 (SynchroShift), 16 (ElectroShift)
Total Gears: -

Dimensions

Length (in): 161.8 in
Width (in): 76.8 in (2WD), 79.9 in (4WD)
Height (in): 106.7 in (cab)
Operating Weight (lb): 8,135 lbs (4WD ROPS)

Power Take-Off (PTO)

PTO Type: Independent
PTO Speed 1 (rpm): 540 RPM
PTO Speed 2 (rpm): 1000 RPM (if equipped)
PTO Speed 3 (rpm): -

Miscellaneous

Chassis: 4x2 2WD or 4x4 MFWD 4WD
Drive Type: -
Steering Type: Hydrostatic power
Coolant Capacity (qts): 15.3 qts
Front Tire Diameter (in): 16 in
Front Tire Width (in): 7.50 in
Rear Tire Diameter (in): 30 in
Rear Tire Width (in): 16.9 in
Front/Rear Rim Diameter (in): -
Tire Type: Ag
Manufacture - End Year: 1995
Hitch Type: Three-Point Hitch
Hitch Category: II
Hitch Position: -
Hitch Capacity (lb): 4,200 - 6,565 lbs (depending on model)
Operator Station Type: Two-post foldable ROPS, Comfort Command Cab (optional)
Starter Type: Electric
Brake Type: Mechanical (S) or hydraulic wet disc (SL/SLE)
Hydraulic System Type: Open center (S/SL), Closed center load sensing (SLE)

Test Results

Nebraska Tractor Test Laboratory - Test Date: June to August 1992

Maximum Power and Fuel Consumption

Maximum Power: 76.4 HP (57.0 kW) at 2205 rpm
Fuel Consumption at Maximum Power: 4.34 Gal/hr (16.43 l/h) with a fuel efficiency of 0.403 lb/hp.hr (0.245 kg/kW.h)
Standard PTO Speed: 1002 rpm

Drawbar Performance

Power at Rated Engine Speed (8th Gear): 52.8 HP (39.3 kW) with a drawbar pull of 5110 lbs (22.7 kN) and a speed of 3.4 mph (5.47 km/h)
Fuel Consumption at Rated Speed: 0.518 lb/hp.hr (0.315 kg/kW.h) with a fuel efficiency of 13.50 Hp.hr/gal (2.66 kW.h/l)

Torque and Engine Performance

Maximum Torque: 226.2 lb.-ft. (306.8 Nm) at 1237 rpm
Torque Rise: 21.6%

Hydraulic Performance

Maximum Force Exerted: 4925 lbs (21.9 kN) at hitch points
Pump Delivery Rate: 9.7 GPM (36.6 l/min) at rated engine speed
Hydraulic Power: 12.1 HP (9.0 kW) at delivery pressure of 2465 psi (170 bar)

Overall Efficiency

Fuel Efficiency at Standard PTO Speed (1002 rpm): 17.35 Hp.hr/gal (3.12 kW.h/l)
Fuel Consumption: 4.34 Gal/hr (16.43 l/h) at 2205 rpm

NTTL.(1992).Nebraska OECD Tractor test 1435 for Ford 6640 12x12 Diesel. Lincoln, NE:Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/2735