TIER 4 or euro 4 ENGINES


There is a growing awareness of the need to care for the environment, which is why emission standards for diesel engines are being established. These standards are implemented by the United States Environmental Protection Agency (EPA) and are also applied in other countries or regions under similar names, such as Europe.

Here are some of the most common Tier 4 (in Europe “Stage IV”) compliant industrial engines from brands such as John Deere and Yanmar.


The John Deere 6090 engine is an in-line 6-cylinder PowerTech series diesel engine with a displacement of around 9.0 liters. It achieves a power output ranging from 150 to more than 300 horsepower (HP).

This engine can be found in agricultural tractors, harvesters, forestry machines…


The 4TNV98C is an in-line 4-cylinder diesel engine with a displacement of approximately 3.319 liters. It can offer a variety of power outputs depending on the specific application and configuration, but is generally in the range of 45 to 66 horsepower (HP). In addition, it uses a direct fuel injection system that allows for better combustion efficiency and reduced emissions.

This engine is applied in machines such as harvesters, excavators, mini loaders…

In addition, another Yanmar engine with these characteristics is the 4TNV98CT. Both engines have similarities and differ in that the 4TNV98CT engine is turbocharged, i.e. it uses a supercharging system to increase the amount of air entering the engine, resulting in improved engine performance and power.


John Deere and Yanmar share a partnership in the design and manufacture of certain engines. This collaboration has led to the production of certain engine models that are marketed under both brands. These shared engines are used in a variety of equipment, such as compact tractors, compact excavators and other agricultural and industrial equipment. The table below shows which engines John Deere and Yanmar have in common:

engines yanmar and john deere

At Oryx Parts we have engine spare parts to repair the engines mentioned above. We specialized in John Deere parts, Yanmar parts, Kubota parts, Deutz parts and more, contact us!

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