The John Deere 2550 tractor is part of the same series of machines that also includes the John Deere 2150 and the John Deere 2350 tractors. This is the 2050 series of compact utility tractors that was designed and built throughout the 1980’s. The tractors were mostly built in the Mannheim plant which John Deere run in Germany. The JD 2550 has a fuel tank that holds up to 90.8 liters (24 US gallons). This fuel tank feeds the engine which is a John Deere made 4 cylinder. The engine is naturally aspirated and kept cool using a liquid cooling system that holds up to 12.9 liters of coolant. The engine fires at a compression ratio of 17.4 to 1. It has a dual paper element air filter to stop damaging contaminants from getting into the combustion chambers. The 3.9 liter engine has a max power output of 65 hp.
The engine powers the wheels on the John Deere 2550 through one of two different gearbox choices. The first is a John Deere built Top-Shaft Synchronized, partially synchronized transmission that gives the operator 8 speeds going forwards and 4 when reversing. The top speed of the tractor using this gearbox is 27.3 kph (17 mph). The other gearbox choice gives the operator twice the number of gears, 16 going forward and 8 for reversing. The gearbox is a partial power shift, JD Hi-Lo Top Shaft Synchronized which gives the JD 2550 a top speed of 28.6 kph (17.8 mph).
The engine on the John Deere 2550 tractor also is responsible for powering the hydraulics which in turn powers the rear hitch (category 1/2) as well as a front loader attachment. The hydraulics system is a closed center type that has a valve flow rate of 49.2 liters per minute (13 US gallons per minute) and operates at a pressure of 158.6 bar (2300 psi). This system gives the rear hitch a maximum lifting capacity of 1240 kg (2735 lbs).