The PTO connects the tractor’s engine to the implement through a rotating shaft at the rear of the tractor. If you compare utility tractors by PTO horsepower, be careful. Some manufacturers rate the tractor at maximum PTO speed instead of the standard 540 rpm. This can be confusing, but don’t worry. Your dealer can help you decide what tractor best fits your horsepower needs.

What is PTO horsepower? The second horsepower number that you’ll see for a tractor is PTO horsepower because it indicates the actual “useable” power that the tractor has to operate implements. PTO stands for Power Take Off.

What is torque? Simply put, torque is the ability of the tractor’s drive wheels to turn. It’s measured in ft-lbs or N-m. (Technically speaking, it’s force multiplied by the distance from a specific point.) The greater a tractor’s torque, the easier it will be to  pull  through tough patches. Look for tractors that have high torque engines — especially those that increase torque as the engine speed slows down from the tractor’s rated engine speed. These will have more success in the toughest chores.

A non-synchronized transmission is an economical, reliable choice when used for the right jobs. With this transmission, you must depress the clutch, stop the tractor, and shift gears. This can be
tiresome for applications where you need to change speeds or directions frequently (such as loader work). However, for mowing or plowing, this transmission – sometimes called a collar-shift transmission – is a good choice.

A smoother and more flexible system than non-synchronized, this transmission allows clutching and shifting between gears without stopping the tractor. Speed or direction changes can be made more easily.

Shift on the go – you can shift gears without stopping the tractor or depressing the clutch. Tractors have a combination of ranges (such as A, B, and C) and gears to give you a choice of several travel speeds.

Most similar to the automatic transmission in a car, a hydrostatic transmission is usually the most expensive. However, it’s the most user-friendly, with instant direction and unlimited speed changes. It’s easy to quickly get the exact speed you want for a task.

Selective Control Valves (SCVs)  are the ‘nerve centre’ of the hydraulic system. They control the amount and direction of the hydraulic flow. Most implements require at least one SCV to lift or lower, fold or adjust. The number of SCVs you’ll need will depend greatly on the implements you’ll be using. Loaders require a minimum of 2 SCVs. Some tractors have SCV couplers placed in
the middle of the tractor to make loader hookup and removal easier, plus they leave the rear SCV couplers free for additional implements.

A 3-point hitch is based on three mounting points for the implement. The lift arms are the two steel or cast arms extending rearward. They provide the lift and are the pull-point for the implement. The top link is the third mounting point that extends from a top middle position at the rear of the tractor.  It adjusts the angle/level of the implement. If you want to use the maximum number of implements, you should buy a tractor with a true Category 1 or 2 3-point hitch. With this hitch you can attach one brand of implements to another’s tractor. Although a garden tractor can accept some proprietary attachments such as tillers, moving up to a Category 1 3-point hitch expands your choice of implements.  Category 0: For tractors with up to 20 horsepower. Category 1: For tractors with 20 to 50 horsepower. Category 2: For tractors with 50 to 90 horsepower. Categories are standard for all manufactures.

R1 (bar tread) tires provide the best traction, but can cause the most ground damage.

R3 (turf tread) tires with less aggressive tread are meant for jobs like mowing and have the least traction.

R4 (industrial-tread) tires have excellent traction, and are softer on turf than R1’s. They’re often the preferred choice.

If you run out of diesel, just fill up again and crank the engine. The fuel system will bleed itself, so you can start working.

Starting from the 2520 we offer all  compact utility tractors with direct injection (fuel is injected directly into the engine cylinder). Advantages over indirect injection are:

1. Easier to start
2. Less fuel consumption
3. Higher efficiency
4. Higher performance

Easy to operate the hydrostatic transmission by using the single pedals for forward and reveres. There is no obstruction caused by the pedal. Turning brakes are located on the left hand side.

Hydraulic performance is important to operate your attachments like loaders, 3point hitch or front hitch.  This insures you can work at he highest performance level. Flow at pressure enables Hydraulic power. Total pump volume approx. 39,6 l/min Pressure 167 bar.

On almost all John Deere engines use turbocharged engines. On the 3720 we even use a turbo intercooler. This provides more performance and more torque. On large chassis we are using a John Deere PowerTech engine with Integrated Fuel System which provides the ultimate power.

A radiator type device for cooling air before it enters the engine. Cool air is more dense allowing more oxygen density and there for better performance.

We do have the highest fuel capacity fuel tanks but it is not just about how much fuel the fuel tank holds, it's how well the machine uses the fuel. Just like a 60 liter tank on a 4 cylinder car, compared to a 60L tank on a V8. How far the distance traveled is very different.
Fuel consumption approx. In direct Injection (IDI) 260g/kWh –Tier II Direct Injection (ID) 230g/kWh I.e. 3520 26.3kW x 230 g/kWh = 6049 g/h approx. 6 l/h 51 l fuel tank / 6 l/h = 8.5h @ max power. For mowing 75% load is approx. required. This would mean over 11 hours!