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About the John Deere 8440

In 1979, the very first John Deere 8440 Tractors went out. They were produced until 1982. You may have gotten a good deal and purchased your John Deere 8440 Tractor for less than the initial price of $64,000 (1982), but when it comes to spare parts for the John Deere 8440 Tractor, you will always get the best deal with us. Sometimes, the parts compatibility is determined by the serial number of your John Deere 8440 Tractor, and that info should be listed on the part fit notes. If you don't have the serial number of your tractor, you can find it on the rear of transmission case. The serial number starts from 1000 for a 1979 model, from 2266 for a 1980 model, from 3758 for a 1981 model, from 5235 for a 1982 model. They also have hydraulic wet disc brakes. The type III 3-point hitch is very reliable, capable to lift 8,545 lbs [3876 kg]. It is also worth noting that the independent rear PTO runs at 1000 rpms. The John Deere 8440 has a closed center hydraulics system with a 35 gal [132.5 L] capacity. The pump does the job pushing 33 gpm [124.9 lpm] fluids in the hydraulics system.

Parts for John Deere 8440 Tractor

Universal View All Universal Products

Air Conditioning

A/C Hose Lines/Kits

Blower Wheels

Blower/Condenser Motors


Compressor Clutch Bearings

Compressor Clutches

Compressor/Compressor Kits

Electrical Parts


Evaporator Cores

Evaporator/Temp Controls

Expansion Valves

Heater Control Valves

O-rings/ Fittings/ Misc

Receiver Driers




Cab Parts


Cooling System

Engine Overhaul Kits

Engine Parts

6-466 Diesel

6-466 Turbo Diesel

6.466A & 6.466T Diesel, 400 Series

6.466A Diesel, 400 Series

Camshaft & Components

Crankshaft & Components

Engine Oil Pump, Cooler, and Related

Engine Related Parts

Exhaust System Parts


Gaskets/Gasket Sets

Turbos & Components



Front Axle/Steering Parts

Fuel System

Hitch & Drawbar Parts

Hydraulic System

Ignition & Electrical Parts

Mufflers/Exhaust Pipes

Exhaust Pipes


PTO Components

PTO and Related Parts


Transmission & Rear Axle

John Deere 8440 Tractor Manuals

  • John Deere OPERATORS MANUAL 8440 and 8640 Tractors