John Deere 840

Last Updated: June 2024

Overview

The John Deere 840 is a utility tractor recognized for its 2WD chassis configuration and manual steering. It was engineered with a liquid-cooled, 3-cylinder diesel engine, capable of delivering 37.5 horsepower at a rated RPM of 2400, making it suitable for a variety of farm tasks. The tractor features a dual transmission system, a collar shift with 8 forward and 4 reverse gears, and an upgraded two-speed power shift option providing 16 forward and 8 reverse gears, enhancing its operational versatility. The tractor's open operator station with ROPS or cab option (not confirmed), paired with a 179 cubic inch engine and a dry disc clutch, enables responsive handling and control. Its dimensions and weight underscore a robust build with a length of 138 inches, width of 65.4 inches, a height to the exhaust of 103.1 inches, and an operating weight of 5004 lbs, well-suited for challenging fieldwork.
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Key Specifications

Category: Utility

Power Output: 37.5

Transmission: Collar shift and two-speed power shift

Drive Type: 2WD

Operating Weight: 5004

Fuel Type: Diesel

John Deere 840 vs. Similar Tractors

Power Output
Average
Greater than 34% of similar tractors.
Operating Weight
Average
Greater than 43% of similar tractors.

Technical Specifications

Engine

Manufacturer
John Deere
Model
-
Cooling Type
Liquid-cooled
Cylinder Orientation
-
Valve Configuration
-
Fuel Type
Diesel
Induction Type
Direct injection
Cylinders
3
Displacement (ci)
179
Bore (in)
4.19
Stroke (in)
4.33
Rated RPM
2400
Power Output (hp)
37.5

Transmission

Type
Collar shift and two-speed power shift
Forward Gears
16 (The existence of 8-speed and two-speed power shift suggests an upgrade or option, leading to 16 forward gears when combined)
Reverse Gears
8 (The existence of 4 reverse plus two-speed power shift suggests 8 reverse gears when combined)
Total Gears
-

Dimensions

Length (in)
138
Width (in)
65.4
Height (in)
103.1 (Tallest point which is exhaust)
Operating Weight (lb)
5004

Power Take-Off (PTO)

PTO Type
-
PTO Speed 1 (rpm)
-
PTO Speed 2 (rpm)
-
PTO Speed 3 (rpm)
-

Miscellaneous

Chassis
4x2 2WD
Drive Type
2WD
Steering Type
Manual
Coolant Capacity (qts)
11.1
Front Tire Diameter (in)
Unknown (However, standard tire sizes imply a diameter, typical diameters for a 6.50-16 tire could be assumed but are not provided)
Front Tire Width (in)
Unknown (However, "6.50-16" suggests a width of 6.5 inches)
Rear Tire Diameter (in)
Unknown (However, standard tire sizes imply a diameter, typical diameters for a 12.4-32 or 9.5-36 tire could be assumed but are not provided)
Rear Tire Width (in)
Unknown (However, "12.4-32" and "9.5-36" suggest widths of 12.4 and 9.5 inches respectively)
Front/Rear Rim Diameter (in)
Unknown (Not explicitly detailed, though "16" from "6.50-16" and "32","36" from "12.4-32","9.5-36" suggest 16, 32, and 36 inches respectively)
Tire Type
Ag (Agricultural)
Manufacture - End Year
-
Hitch Type
Unknown (Rear Type II/I refers to the hitch category but not the type)
Hitch Category
II/I
Hitch Position
Rear (Generally, the classification such as II/I indicates rear hitch)
Hitch Capacity (lb)
-
Operator Station Type
Unknown (ROPS height is provided which implies at least a ROPS station)
Starter Type
Electric (deduced from engine starter volts detail)
Brake Type
-
Hydraulic System Type
Closed center