The OTTO 6BG1 is a fully integrated diesel engine assembly specially manufactured for excavator engine replacement and overhaul. It comes complete with all key components pre‑assembled, providing direct installation, restoring original machine power, and ensuring stable, efficient operation in harsh construction environments.

The OTTO 4HK1 is a professional complete diesel engine assembly designed as a direct replacement for the Hitachi ZX270LC-3 excavator. It includes all key internal components and comes pre-assembled, restoring your machine’s original power, responsiveness, and efficiency while minimizing downtime during engine overhaul.

The OTTO 3M19-01001 is a key main control valve for the Komatsu HX340L hydraulic system. It controls the flow and direction of hydraulic oil to drive the boom, arm, bucket, swing and travel functions, providing accurate operation, low leakage and long service life for heavy machinery.

The OTTO 228-3238 is a professional travel drive motor designed exclusively for Caterpillar 374D and 374F excavators. It provides reliable driving force for the machine’s movement, supporting forward, reverse, and stable operation on rough, uneven construction terrain while resisting wear and high pressure—essential for maintaining productivity and minimizing downtime in harsh heavy-duty working environments.

The OTTO DX225LCA is a professional hydraulic valve component designed exclusively for Doosan DX225LCA excavators. It controls the flow and direction of hydraulic oil to drive the boom, arm, bucket, swing, and travel functions, ensuring responsive operation, precise control, and consistent performance—essential for maintaining productivity and reducing hydraulic system faults in harsh construction environments.

The OTTO SK320-2 is a complete travel motor and final drive assembly designed exclusively for Kobelco SK320-2 excavators. It provides reliable driving force for the machine’s movement, supporting forward, reverse, and stable operation on rough terrain, while resisting wear and impact—critical for maintaining productivity and minimizing downtime in harsh construction and earthmoving environments.

The OTTO Long Cylinder Head is a professional engine cylinder head component designed exclusively for 4HK1 engines in excavators. It provides a secure foundation for valves, valve seats, and other top-end engine parts, ensuring airtight sealing, smooth valve operation, and consistent engine power output—essential for restoring engine functionality and minimizing downtime in harsh heavy-duty working environments.

The OTTO PC340LC-7 is a complete undercarriage track link with an attached track shoe, designed exclusively for Komatsu PC340LC-7 excavators. It provides reliable support and traction for the machine, enabling smooth movement on rough, uneven construction terrain while resisting wear and impact—essential for maintaining productivity and reducing undercarriage maintenance frequency.

The OTTO S3L2 is a professional complete engine assembly specially built as a direct replacement or repower solution for excavators and small‑to‑medium heavy machinery. It integrates all key components including cylinder block, cylinder head, crankshaft, pistons, fuel system, and lubrication system, delivering ready‑to‑install performance and restoring equipment to full working capacity.

The OTTO 38K9-10150 is a complete swing drive motor assembly designed for Hyundai HX330L excavators. It integrates all essential components to provide consistent power for the upper structure rotation, ensuring responsive control, low noise, and long service life—critical for maintaining productivity in harsh construction and earthmoving environments.

The OTTO KTC0185 is a professional swing gearbox replacement part designed for CASE CX460 and CX470B excavators. It provides consistent power to control the upper structure rotation, ensuring responsive operation, low noise, and long service life—essential for restoring full swing functionality and maintaining productivity in harsh construction environments.

The OTTO 21W-26-00100 is a critical swing drive motor for excavator swing systems, designed to restore full slewing functionality. It provides consistent power for the upper structure rotation, ensuring responsive control, low noise, and long service life—essential for maintaining productivity in harsh construction and earthmoving environments.