Cummins engines are renowned for their reliability and unpretentiousness. However, sooner or later, the service life of even the most unpretentious unit makes you think about its planned repair, including replacing the pistons. When using equipment in difficult conditions, the manufacturer prescribes maintenance at reduced intervals, which prolongs the service life of the Cummins engine. The use of original parts, consumables and fluids also plays a role in extending the life of the motor.