4441981 4625242 Main Hydraulic Pump for Hitachi ZX160 LCT ZX185USR | Heavy Duty Excavator Piston Pump Aftermarket Spare Parts

The Hitachi ZX160 LCT and ZX185USR are precision machines that require a robust hydraulic heart. Our 4441981 and 4625242 Main Hydraulic Pumps are engineered to deliver the high-pressure flow required for rapid cycle times and maximum breakout force. Whether you are operating in tight urban spaces with the ultra-short radius ZX185USR or handling heavy earthmoving with the ZX160 LCT, this pump ensures consistent, reliable power delivery.

• Specially designed for Hitachi ZX160 LCT and ZX185USR excavators, strictly matching part numbers 4441981 and 4625242 with standard mounting dimensions for direct replacement.
• Adopts compact and lightweight structure to fit the limited installation space of small and medium-sized excavators perfectly.
• High-precision swash plate design delivers stable oil displacement and sensitive pressure response, adapting to variable working load efficiently.
• Heat-treated internal components feature high hardness and low wear rate, supporting long-hour continuous operation.
• Advanced sealing system effectively prevents hydraulic oil leakage and resists dust and moisture in outdoor construction sites.
• Optimized oil passage reduces flow resistance and energy loss, improving the overall hydraulic efficiency of the whole machine.

Why This Pump is a Top Choice for Fleet Managers:

Optimized Flow Distribution: Specifically calibrated for Hitachi's hydraulic logic to ensure smooth multi-function synchronization (boom, arm, and bucket working in harmony).

Direct "Plug-and-Play" Fitment: Manufactured to the exact specifications of Part No. 4441981, ensuring all hydraulic ports and mounting flanges align perfectly without modification.

Built for Heavy-Duty Cycles: Using high-grade hardened alloy steel for all internal rotary groups, our pumps resist cavitation and thermal expansion, significantly extending the service life of your hydraulic system.

Fuel Efficiency: The advanced variable displacement swash-plate design reduces unnecessary engine load, helping your machine maintain optimal fuel economy.

Installation and Maintenance

Symptoms: If your Hitachi excavator exhibits signs such as insufficient hydraulic power, abnormal whistling from the pump room, or excessively long cycle times, you need to check your 4441981 model hydraulic pump.

"Cleanliness First" Principle: Never install a new 4625242 model hydraulic pump into a contaminated system. Always thoroughly flush the entire system and replace all hydraulic filters to prevent residual metal debris from scratching the new piston.

Guangzhou Tieqi Construction Machinery Co., Ltd. has specialized in engineering machinery hydraulics for nearly 15 years.

Strategically located in Guangzhou's Huangpu District, approximately an hour from Baiyun International Airport.

• Ready inventory of over 500 assembly types with access to 6,000+ different parts
• Specialization in hydraulic pumps, control valves, travel, and swing assemblies
• Distinct advantage in large mining excavator components and hard-to-find items
• 4,000-square-meter factory equipped for professional manufacturing and testing

Our packaging includes sturdy plywood crates with metal fasteners, internal bubble wrap cushioning, wooden braces, high-strength PET plastic strapping, and waterproof black film to ensure safe delivery.

• One-stop solution provider for hydraulic components
• High-quality products at competitive prices
• Exceptional customer service
• Large inventory with short delivery times
• Long warranty periods
• Professional expertise in excavator components