The tractor is equipped with a high-quality, brand-name engine that complies with the National Emission Standard II. This engine is noted for being powerful, reliable, and economical. It uses a 10-inch double-acting clutch made of imported friction material, ensuring high reliability and a large torque reserve coefficient. Furthermore, the shifting yoke utilizes an inblock cast design for better reliability and a longer service life.

The RK504-A features a 12F+12R shuttle shift transmission with side control, providing smoother and more comfortable gear shifting, which significantly improves continuous operation efficiency. The design also incorporates features for improved sealing, as key parts of the transmission system (like the half shaft and PTO shaft) have been upgraded to NAK box-type oil seals to prevent leaks.

This model is designed for high operational efficiency, featuring an enhanced two-speed power output (540/760 r/min, with 540/1000 r/min optional) that can match various tools and implements. The hydraulic system includes a semi-partition lifter that works effectively with force-position control, and the rear track is adjustable, making the tractor highly adaptable to various agronomic requirements.