SWAFLY High-Performance Boom Cylinder Assembly for Hitachi Excavator Model ZX240-5A - Replacement Part Number: 9309801H, 9309801H
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SWAFLY High-Performance Boom Cylinder Assembly for Hitachi Excavator Model ZX240-5A - Replacement Part Number: 9309801H, 9309801H
Premium Replacement Hydraulic Components for Construction Machinery
SWAFLY is your trusted global supplier of quality engineering machinery spares. We specialize in robust replacement parts, including this essential BOOM CYLINDER (Cyl. Boom) designed for the Hitachi ZX240-5A hydraulic excavator. The cylinder is identified by the crucial replacement part numbers: 9309801H and its non-hyphenated variant 9309801H. This Hitachi hydraulic cylinder ensures optimal lifting power and precise operation for your heavy equipment.
Our core business revolves around providing reliable engineering machinery accessories. SWAFLY maintains a vast inventory of excavator hydraulic pump assemblies, travel motor spares, swing reduction gearbox, final drive planetary carrier, engine overhaul kits, undercarriage components like track roller replacement and track chain link assembly. We offer competitive pricing on Hitachi ZX240-5A engine parts, hydraulic cylinder seal kits, main control valve rebuild, pilot pump maintenance, excavator radiator fan motor, swing bearing slewing ring, bucket teeth and adapters, dozer blade cutting edge, transmission clutch disc, loaders torque converter, grader moldboard parts, forklift mast cylinder seal, concrete pump wear plate, crane slewing gear, skid steer hydraulic filter, drilling rig rotary head components, paver track pad replacement, and mining truck suspension parts.
This specific Hitachi ZX240-5A BOOM CYLINDER with 9309801H (9309801H) is manufactured to meet or exceed OEM specifications. For optimal performance, pair it with our premium CYLINDER SEAL KIT, ensuring a leak-free and durable repair. We are dedicated to providing parts that enhance the longevity and efficiency of your Hitachi excavator and other heavy machinery.
Key Engineering Machinery Component Glossary
Travel Motor: Converts hydraulic fluid power into rotation to drive the tracks. Installed on the track frame. Example: Komatsu PC200-8 Travel Motor.
Slewing Bearing: A large-diameter bearing allowing the upper structure (cab/boom) to rotate relative to the undercarriage. Installed between the car body and the track frame. Example: Hyundai R220LC-9S Slewing Bearing.
Idler: A component that guides the track and maintains track tension. Installed at the front or rear of the undercarriage. Example: JCB JS300 Idler Wheel.
Bucket Cylinder: A hydraulic cylinder used to curl or dump the bucket. Installed between the bucket linkage and the stick. Example: Volvo EC380E Bucket Cylinder.
Main Control Valve: Directs hydraulic flow from the pump to the various actuators (cylinders/motors). Installed in the upper structure near the pump. Example: Doosan DX225LC-5 Main Control Valve.
Water Pump: Circulates coolant through the engine to prevent overheating. Installed on the engine block. Example: Cummins QSB6.7 Water Pump.
Torque Converter: A fluid coupling that transfers rotational power from the engine to the transmission in wheel loaders and dozers. Installed between the engine and the transmission. Example: Kawasaki 90Z7 Torque Converter.
Piston Ring: Seals the combustion chamber, regulates oil consumption, and transfers heat from the piston to the cylinder wall. Installed in the piston grooves. Example: Isuzu 4HK1 Piston Ring Set.
Final Drive: The last set of gears that reduces speed and increases torque before the power is delivered to the track/wheel. Part of the travel motor assembly. Example: Caterpillar 345D Final Drive Gearbox.
Fan Motor: Drives the cooling fan for the radiator and oil cooler. Installed in the engine compartment/cooling system assembly. Example: Kubota KX080-4 Fan Motor.
Product Knowledge: The Boom Cylinder (CYL.;BOOM)
The Boom Cylinder is one of the most critical hydraulic actuators on an excavator, responsible for raising and lowering the main boom structure. On the Hitachi ZX240-5A, two boom cylinders are typically installed. They must withstand immense pressure and lateral loads. Key specifications for part number 9309801H relate to the bore, rod diameter, and stroke length, ensuring perfect fit and function with the machine's existing hydraulic system and kinematics. Regular maintenance, including timely replacement of the CYLINDER SEAL KIT, is essential to prevent leakage and catastrophic failure.
Heavy Equipment Troubleshooting: Hydraulic System Failure
Equipment: Volvo EC210D Excavator
Fault Description: The hydraulic system experiences sudden loss of power during multi-function operations, especially when swinging and lifting simultaneously. The machine's engine bogs down, but no external leaks are visible.
Diagnosis & Solution: This often points to a problem with the hydraulic pump's proportional pressure control (PPC) system, specifically the flow control or regulator valve. The pump may be failing to destroke (reduce flow) when system pressure spikes, causing the engine to stall under load. Solution: Check the pump control pressure (M-port pressure). If it's incorrect, inspect and replace the load-sensing control valve or the main pump regulator. In severe cases, the main hydraulic pump assembly may require replacement or repair to restore proper pressure and flow matching, ensuring efficient use of engine power.
1688 Sourcing & Custom Manufacturing Service
Beyond standard replacement parts like the Hitachi ZX240-5A BOOM CYLINDER, SWAFLY proudly supports the customization and development of various non-standard or obsolete engineering machinery accessories. If you require specialized dimensions for a cylinder rod, a custom hydraulic cylinder body, or any unique Cylinder Seal Kit, our R&D team can provide customized development and precision machining services to meet your exact specifications.
Inquire today for bespoke hydraulic and engine component solutions!
SWAFLY Global Business Network
SWAFLY is committed to being a global partner for all your heavy equipment parts needs, covering excavator, bulldozer, loader, and engine parts. We offer comprehensive sales and technical support worldwide.
Visit our specialized platforms to explore our full product lines:
www.hitachi-isuzuparts.com (Specializing in Hitachi and Isuzu Components)
www.kubotaengine.ca (Focused on Kubota Engine Spares)
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SWAFLY High-Performance Boom Cylinder Assembly for Hitachi Excavator Model ZX240-5A - Replacement Part Number: 9309801H, 9309801H
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