Ford New Holland Ltd 7840 PulseCommand

Last Updated: July 2024

Overview

The Ford 7840 PulseCommand is a versatile row-crop tractor manufactured by Ford New Holland Ltd in 1992. It features a powerful Ford Genesis engine with a 6.6 L (401 cu in) displacement and naturally aspirated diesel six-cylinder inline configuration. This tractor is capable of producing 90.4 horsepower and can work with various attachments due to its dual power take-off speeds of 540 rpm at 1890 engine rpm and 1000 rpm at 2103 engine rpm. Designed with practicality in mind, it comes with either two-wheel drive or four-wheel drive options and multiple transmission types to suit a variety of tasks. The Ford 7840 PulseCommand also offers a comfortable operating environment with an optional Comfort Command Cab, in addition to features like hydrostatic power steering and hydraulically actuated wet disc brakes for optimal control. Whether fitted with the two-post foldable ROPS or the more luxurious cab, this tractor is suitable for a range of agricultural operations, making it a valuable asset for farmers seeking a reliable workhorse. The specifications have been updated based on independent test results from the Nebraska Tractor Test Laboratory, providing additional details on performance, dimensions, fuel consumption, hydraulic system capabilities, and drawbar performance.
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Key Specifications

Category: Row Crop

Power Output: 90.4

Transmission: Constant mesh or Two-speed power shift or Synchronized or Four-speed power shift

Drive Type: 2WD or 4WD

Operating Weight: 8076 to 10274

Fuel Type: Diesel

Technical Specifications

Engine

Manufacturer
Ford
Model
Genesis
Cooling Type
Liquid-cooled
Cylinder Orientation
Inline
Valve Configuration
-
Fuel Type
Diesel
Induction Type
Naturally aspirated
Cylinders
6
Displacement (ci)
401
Bore (in)
4.4
Stroke (in)
4.4
Rated RPM
2100
Power Output (hp)
90.4

Transmission

Type
Constant mesh or Two-speed power shift or Synchronized or Four-speed power shift
Forward Gears
8 or 16
Reverse Gears
2 or 4 or 12
Total Gears
-

Dimensions

Length (in)
176
Width (in)
82.7
Height (in)
109.8
Operating Weight (lb)
8076 to 10274

Power Take-Off (PTO)

PTO Type
Independent Rear PTO
PTO Speed 1 (rpm)
540 at 1890 engine rpm
PTO Speed 2 (rpm)
-
PTO Speed 3 (rpm)
-

Miscellaneous

Chassis
4x2 2WD or 4x4 MFWD 4WD (optional)
Drive Type
2WD or 4WD
Steering Type
Hydrostatic power
Coolant Capacity (qts)
21.1
Front Tire Diameter (in)
-
Front Tire Width (in)
-
Rear Tire Diameter (in)
-
Rear Tire Width (in)
-
Front/Rear Rim Diameter (in)
-
Tire Type
Ag
Manufacture - End Year
1995
Hitch Type
II
Hitch Category
-
Hitch Position
Rear
Hitch Capacity (lb)
6210 to 8710
Operator Station Type
Two-post foldable ROPS or Comfort Command Cab (optional)
Starter Type
Electric
Brake Type
Multiple wet disc hydraulically actuated by two foot pedals which can be locked together
Hydraulic System Type
Open center (S/SL) or closed center load sensing (SLE)

Test Results

Nebraska Tractor Test Laboratory - Test Date: August to September, 1992

Maximum Power and Fuel Consumption

  • Maximum Power: 90.4 HP (67.4 kW) at 2070 rpm
  • Fuel Consumption at Maximum Power: 5.29 Gal/hr (20.01 l/h) with a fuel efficiency of 0.109 lb/hp.hr (0.249 kg/kW.h)
  • Fuel Weight: 6.99 lbs/gal (0.838 kg/l)

Drawbar Performance

  • Maximum Drawbar Power (6th Gear): 75.2 HP (56.1 kW) with a drawbar pull of 8765 lbs (39.0 kN) and a speed of 5.2 mph (8.37 km/h)
  • Fuel Consumption at Maximum Drawbar Power: 0.505 lb/hp.hr (0.307 kg/kW.h) with a fuel efficiency of 13.86 Hp.hr/gal (2.73 kW.h/l)

Torque and Engine Performance

  • Maximum Torque: 278.7 lb.-ft. (377.9 Nm) at 1197 rpm
  • Torque Rise: 21.5% with a power increase at 1600 engine rpm of 14%

Hydraulic Performance

  • Maximum Force Exerted: 6610 lbs (29.4 kN) at hitch points
  • Pump Delivery Rate: 21.4 GPM (80.9 l/min) at minimum pressure and rated engine speed
  • Hydraulic Power: 20.3 HP (15.2 kW) at delivery pressure of 2840 psi (196 bar)

Overall Efficiency

  • Fuel Efficiency at Standard PTO Speed (540 rpm): 17.08 Hp.hr/gal (3.37 kW.h/l)
  • Fuel Consumption: 5.29 Gal/hr (20.01 l/h) at 2070 rpm



NTTL. (1992). Nebraska Summary: S163 Ford 7840 12x12. Lincoln, NE: Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/2733

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