This OTTO Original Excavator Controller Computer Board (Part No.: YA00071517, YA60055463) is a core control component for Hitachi ZAXIS excavators, responsible for accurate control and coordination of the excavator’s engine, hydraulic system, and electrical components. It ensures stable signal transmission, avoiding system malfunctions and maintaining the excavator’s normal and efficient operation.

OTTO T400455 Cylinder Block is precision-cast from high-grade cast iron, offering exceptional rigidity, heat resistance and deformation resistance for Perkins 1104D, 1106D and CAT C6.6 engines. Strict machining ensures accurate oil galleries and perfect mating surfaces.

OTTO 4HK1 Engine Assembly provides strong power, high torque and stable performance for Hitachi ZX240-3 and ZX250-3 excavators. Premium components and precise machining ensure excellent combustion, low fuel consumption and long service life.

OTTO 6HK1 Engine Assembly delivers strong power, high torque and stable performance for Hitachi ZX380LC-5G excavators. Precision machining and premium components ensure excellent compression, low fuel consumption and long service life.

OTTO D04EG Engine Assembly provides stable power output, low fuel consumption and smooth operation, perfectly matching performance requirements for CAT 307D/308D excavators. Precision machining ensures tight tolerances, strong compression and long‑term reliability.

OTTO 6CTA8.3 Cummins Engine Assembly delivers strong power output (240HP–260HP) with stable performance, high torque, and low fuel consumption, suitable for excavators and trucks under heavy-duty working conditions.

OTTO D5E Engine Long Block is precision-built to OEM specifications, delivering stable power, strong compression and reliable performance for Volvo EC210B/EC210C excavators. Precision-machined mating surfaces ensure excellent sealing and long service life.

OTTO T418502 Cylinder Head is precision-machined to OEM standards, ensuring perfect sealing, stable compression and efficient combustion for Perkins 1104D and CAT C4.4 engines. High-grade alloy construction enhances heat resistance and durability.

OTTO 574-8203 Slewing Ring Bearing features high-precision raceways and hardened rolling elements, delivering excellent load capacity, smooth rotation and stable performance for heavy-duty CAT 374 series excavators.

OTTO Yanmar 4TNV98 Complete Engine Assembly offers stable power output, low fuel consumption and low noise, delivering reliable performance for Hitachi ZX70-5G excavators. Precision manufacturing ensures tight tolerances, smooth operation and long service life.

OTTO 272-6959 SBS140 Hydraulic Main Pump delivers stable high pressure and consistent flow, ensuring smooth and responsive operation of boom, arm, bucket, swing and travel functions on CAT 325D excavators. Precision-machined internal parts minimize leakage and improve overall efficiency.

OTTO 519-7930 Swing Gearbox delivers stable high torque for smooth upper structure rotation, with precision-forged gears and heavy-duty bearings ensuring strong load capacity and long service life.