OTTO Center Joint Assy for Komatsu PC220LC-7 / PC200-7 / PC210-7K / PC228US-3 Excavator - complete hydraulic center joint (swivel joint / rotary joint) assembly that transfers hydraulic oil between the upper structure and the undercarriage. Precision-machined sealing faces and a durable cast body keep every circuit leak-free while the machine swings 360 degrees, restoring full swing, boom, arm, bucket and travel function. Function tested before shipment, 3-12 months warranty options.

OTTO 204-2684 Hydraulic Pump Regulator (pump actuator) for Caterpillar 318C / 320C / 320C L / 320C FM / 321C Excavator - complete pump actuator group assembly (CAT part name Actuator Gp-Pump -Driven, pump lifter) for the SBS120 piston pump. It controls pump displacement and output pressure response, restoring digging power, stable cycle times and efficient fuel use. Function tested before shipment, 3-12 months warranty options.

OTTO 256-0096 Hydraulic Pump Regulator for Caterpillar 320D / 320D2 / 321D / 323D / 323D2 Excavator - complete pump control actuator head assembly supplied without solenoid valve. It precisely controls hydraulic pump displacement to stabilize system pressure and output flow, restoring digging power, fast cycle times and efficient fuel use. Function tested before shipment, 3-12 months warranty options.

OTTO 130-5643 Gear Pump for Caterpillar D6E / D6F / D6G / D6G2 LGP / D6G2 XL Bulldozer - complete implement hydraulic gear pump assembly (CAT PUMP GP-GEAR), supplied as a direct replacement unit. It delivers stable oil flow and pressure for blade lift, tilt and ripper circuits, restoring full implement response and reducing downtime. Function tested before shipment, 3-12 months warranty options.

OTTO YM10V01002F4 Hydraulic Pump Regulator for Kobelco SK135SR / SK135-8 / SK140-8 / SK140SR-3 Excavator - precision control valve assembly for the Kawasaki K7V63DTP main pump, supplied as a complete direct replacement unit. It adjusts the pump swashplate angle to match output flow and pressure to working demand, restoring digging power, fast hydraulic response and efficient fuel use. Function tested before shipment, 3-12 months warranty options.

This OTTO machinery housing with part number 191-3239 is the outer casing of final drive assembly specially for Caterpillar 325BL excavator. It protects internal planetary gears, bearings and seals of travel motor, bears heavy load and impact force during excavation and traveling. It solves common failures such as casing cracking, oil leakage and internal gear damage caused by worn or broken original housing.

This OTTO machinery turbocharger assembly with part number 1-87618259 is a forced induction component for Isuzu diesel engines. It compresses intake air to boost air density inside cylinders, lifting engine power and improving fuel combustion efficiency. It solves common problems including weak power, black smoke emission and slow acceleration caused by damaged, stuck or leaking original turbocharger.

This OTTO machinery fan drive kit with part number 324-4104 is the complete fan pulley drive assembly for Caterpillar 320C / 320CL excavator equipped with 3066 engine. It transfers power to drive the cooling fan, maintaining proper engine operating temperature and preventing overheating during heavy-duty digging. It fixes common faults such as fan wobble, abnormal noise, fan stall and engine overheating caused by worn bearings or damaged original fan drive.

OTTO 4658831 Hydraulic Pump Regulator for Hitachi ZX450-3 / ZX470H-3 / ZX470R-3 / ZX500LC-3 Excavator - precision control valve for the Kawasaki K5V200 main pump, supplied as a complete direct replacement assembly. It adjusts the pump swashplate angle to match output flow and pressure to working demand, restoring digging power, fast hydraulic response and efficient fuel use. Function tested before shipment, 3-12 months warranty options.

This OTTO machinery radiator with part number 4649913 is the engine water cooling radiator specially built for Hitachi ZX330-3 and ZX330-5G excavators. It circulates coolant to dissipate engine heat, maintains normal working temperature and prevents engine overheating under heavy load. It effectively solves overheating, coolant leakage and poor heat dissipation caused by blocked or damaged original radiator core.

This OTTO machinery fuel priming pump with part number 137-5541 is a manual fuel supply component for Caterpillar engines. It manually pumps fuel to purge air from fuel lines before engine startup, ensuring smooth fuel delivery to the injection system. It fixes common troubles such as hard starting, engine stalling and insufficient fuel supply caused by air entering the fuel circuit or failed original priming pump.

This OTTO machinery monitor with part number 21N8-36002 is the instrument display panel for Hyundai R305-7 and R320LC-7 excavators. It displays real-time operating data including engine RPM, coolant temperature, fuel level and working hours, and supports built-in self-diagnosis to pop up machine fault codes and warning alerts. It effectively solves issues such as blank screen, data distortion and alarm failure caused by damaged original monitor.