Hitachi EX300-5 Swing Motor – Specification (4371768 / M2X210CHB)

Description

Detail Information

Note: The application information provided is for reference only. Please confirm the part number and compare it with the old component before purchasing. If you have any questions, please feel free to contact us.
It is worth choosing a product that features stable performance, high reliability, easy installation, and quick response.

1. Key Features & Benefits

• Genuine Kawasaki swing motor – OEM part number 4371768, motor model M2X210CHB-10A-49/290. Manufactured by Kawasaki Precision Machinery, a world-leading hydraulic component supplier. This is a brand‑new, factory‑spec unit – not remanufactured, not a generic substitute.

• Specifically engineered for Hitachi EX300‑5 and compatible 30‑ton class excavators – Designed for Hitachi EX300‑5, EX300‑5HHE, EX300LC‑5, EX300LC‑5M, EX300LCLL‑5, EX300LCLL‑5M, EX330LC‑5, EX345USR, EX345USRLC, EX350‑5, EX350H‑5, EX350K‑5, EX355, EX370‑5M, EX370HD‑5, EX370LL‑5M, EX385USR. This swing motor provides the rotational power for the upper structure, enabling the machine to dig and position material efficiently.

• M2X210CHB series – Kawasaki’s proven swing motor platform – The M2X210CHB is a variable displacement axial piston swing motor engineered for high torque output and precise rotational control in 30‑ton class excavators. It integrates smoothly with the Hitachi EX300‑5’s hydraulic system, delivering smooth, responsive slewing even under heavy bucket loads.

• High torque output for 30‑ton class work – The Hitachi EX300‑5 delivers a swing speed of 11.3 rpm. The M2X210CHB swing motor is engineered to provide the torque and rotational power needed for fast, precise slewing operations. The machine’s operating weight is approximately 68,400 lbs (31,025 kg) with a hydraulic system relief valve pressure of 4,980 psi.

• Integrated relief and makeup valves – Features built‑in relief valves that protect the swing motor against pressure spikes during sudden stops or overloads. Makeup (anti‑cavitation) valves prevent vacuum damage during rapid deceleration. Together, these valves ensure smooth, jerk‑free slewing and extend motor life.

• Heavy‑duty construction for demanding conditions – Built with high‑strength materials and precision‑machined components to withstand the extreme shock loads, vibration, and torsional stress generated during swing operations. Premium seals prevent contamination ingress and oil leakage, extending service life.

• Direct bolt‑on replacement – Mounting flange, shaft interface, and hydraulic port configurations match the original Hitachi/Kawasaki specifications exactly. No modifications, no adapters – your mechanic unbolts the old motor and bolts this one in.

• Pre‑shipment visual verification – Before packing, we send you detailed high‑resolution photographs of the actual unit (mounting flange, splines, port threads, castings, overall condition). You approve shipment – we never ship blind.

• Fast delivery – 5–8 working days lead time from our Guangzhou warehouse. Monthly supply capacity of 300 units, available for single‑piece or bulk orders.

2. Applications

The genuine Hitachi EX300‑5 swing motor is the power source for the slewing system on 30‑ton class excavators used across a wide range of demanding job sites:

• Heavy construction & infrastructure – Highway excavation, dam building, bridge footings, and large‑scale earthmoving projects. The swing motor’s high torque and smooth rotation enable precise positioning of the upper structure for efficient loading and digging cycles. The EX300‑5’s swing speed of 11.3 rpm ensures fast cycle times.

• Quarrying & aggregates – Loading trucks, stockpile management, and material handling in granite, limestone, and basalt quarries. The motor’s robust construction and sealed design withstand abrasive dust conditions, while the M2X210CHB platform provides consistent torque for precise bucket control.

• Mining support – Site cleanup, road maintenance, drainage works, and equipment pad grading. The EX300‑5’s hydraulic system relief valve pressure of 4,980 psi ensures the swing motor delivers consistent power even under extreme loads.

• Demolition & scrap processing – Shock loads, vibration, and sharp debris are routine in demolition yards and metal recycling facilities. The motor’s heavy‑duty construction and integrated relief valves absorb these extreme conditions without premature wear.

• Equipment rental fleet – 30‑ton excavators are high‑value rental assets. A genuine new swing motor provides predictable service life and eliminates the gamble of remanufactured or used units – avoiding costly mid‑rental failures, towing bills, and customer complaints.

• Forestry & land clearing – Steep slopes, fallen timber, and uneven terrain demand reliable swing performance. The motor’s consistent torque delivery ensures smooth, controlled rotation even under varying load conditions.

3. FAQ – Frequently Asked Questions

Q1: Is this swing motor an exact replacement for my Hitachi EX300‑5?

A: Yes. The 4371768 / M2X210CHB is the genuine Kawasaki swing motor for Hitachi EX300‑5 and compatible models including EX300‑5HHE, EX300LC‑5M, EX350‑5, EX350H‑5, EX350K‑5, EX355, EX370‑5M, EX370HD‑5, EX385USR, EX345USR, and EX345USRLC. To confirm compatibility for your specific machine variant, send us your machine serial number and a photo of the old motor nameplate – we will verify within 2 hours.

Q2: Is this a new motor or a remanufactured unit?

A: It is brand new / genuine original, not remanufactured. All internal components are new. The motor is manufactured by Kawasaki Precision Machinery to original specifications and meets all OEM performance standards.

Q3: What are the key specifications of this swing motor?

A: The motor model is M2X210CHB-10A-49/290. The Hitachi EX300‑5 delivers a swing speed of 11.3 rpm. The machine’s hydraulic system relief valve pressure is 4,980 psi, and the operating weight is approximately 68,400 lbs (31,025 kg). The motor features integrated relief and makeup valves for circuit protection.

Q4: What is the warranty on this motor?

A: Warranty period is 3 to 6 months depending on product details. We do not provide warranty service for genuine original parts. Our value is delivered up front: genuine Kawasaki components, new‑condition motor, and pre‑shipment visual verification. For customers who require a warranty‑covered option, we can quote aftermarket alternatives – ask our sales team.

Q5: How long does delivery take?

A: Delivery is 5–8 working days after order confirmation from our Guangzhou warehouse. Express shipping (DHL/FedEx/UPS) is available for urgent orders.

Q6: What payment methods do you accept?

A: We accept L/C, T/T, XTransfer, PayPal, and Western Union.

Q7: How can I verify the motor is genuine before shipping?

A: Before packing, we send you clear, high‑resolution photographs of the actual unit – mounting flange, splines, port threads, casting marks, and overall condition. You approve shipment only after reviewing these images. We never ship blind.

Q8: What oil should I use with this motor?

A: The hydraulic motor section uses the excavator’s main hydraulic oil (typically ISO VG 46). The swing motor is part of the machine’s closed‑centre load‑sensing hydraulic system. Always refer to your Hitachi EX300‑5 operator’s manual for the correct viscosity and specification.

Still have questions? Contact Hongtengda Parts – we reply within 24 hours.