4439383 4440905 Kawasaki MX750 Swing Motor for Hitachi EX1900 Excavator – Genuine Hydraulic Slew Drive Assembly

About Us
– Professional Excavator Parts Supplier Since 2012
we are a trusted supplier specializing in high-quality excavator spare parts for a wide range of leading machinery brands. Our product line includes:

Engine assemblies , Hydraulic pumps ,Final drive motors ,Swing motors with gearbox , Main control valves ,Pilot valves, solenoid valves, joysticks, sensors, and more.

Our parts are fully compatible with well-known brands including Caterpillar (CAT), Komatsu, Hitachi, Kobelco, Hyundai, Volvo, Doosan, Sumitomo, Case, and SANY.

We take pride in offering:

✅ Reliable product quality

✅ Competitive factory prices

✅ Fast delivery and global shipping

✅ Attentive after-sales support

We believe in long-term cooperation and a win-win business philosophy, aiming to support our partners in maximizing equipment uptime and reducing maintenance costs.

Packaging & Delivery
Each motor is professionally packed in a sturdy export-grade wooden case, with moisture-proof and shock-resistant treatment to ensure safety during transit.

We support express shipping (DHL, FedEx, UPS), air freight, and sea freight depending on order size and destination.

Delivery typically takes 3–7 working days for in-stock units, and 15–30 days for special orders.
Goods can be shipped from Guangzhou, or any designated port.
Trade terms such as FOB, CIF, DDP are available upon request.

FAQ

Q: Which machine is this swing motor compatible with?
A: It is designed for the Hitachi EX1900 large excavator.

Q: What is the part number for this motor?
A: It can be referenced by either 4439383 or 4440905, both referring to the MX750 model.

Q: What is the function of the MX750 swing motor?
A: The motor controls the rotation (slew) of the upper body of the excavator.

Q: Is this an original Kawasaki motor?
A: Yes, this is a genuine Kawasaki KPM Japan swing motor assembly.

Q: Do you offer other parts for Hitachi EX1900?
A: Yes, we offer main pumps, travel motors, cylinders, control valves, and more for EX1900.

Guangzhou Zhenhui Machinery Co., Ltd. was established in 2012. It is a modern enterprise specializing in the production of excavator accessories and various supporting operating devices for excavators. It has various imported high-end production equipment and precision testing equipment from Germany and Japan, and has its own Brand Wakestone. We firmly believe that quality is the life of an enterprise, seize the source of quality, strictly control the quality and production process of self-made parts in production, and create high-quality products.
The company mainly produces:
Hydraulic breaker, hydraulic breaker accessories, quick connector, hydraulic grab, soil ripper, vibrator, crushing tongs, hydraulic shears, hydraulic suction cup, rotary drill, tree digging knife, bamboo cutter;
Excavator accessories: engine, hydraulic pump, swing motor, travel motor, main control valve, rotary joint, hydraulic seal kit, bucket, ripper, chassis parts.
Hydraulic breaker parts are suitable for: KRUPP, ATLAS COPCO, SOOSAN, FURUKAWA, SANDVIK/RAMMER, MONTBERT, INDECO, N.P.K, TOKU, DAEMO, MKB, TEISAKU, HANMA, HANWOOD, MSB, GENERAL BREAKER, COMET, MIRACLE, TOYO, OKADA , KCB, DOUBLE BULL, NUKES, A ONE, EDT, KWANGLIM, BLT, DAEKKD, etc.;

Excavator accessories are suitable for: Carter, Komatsu, Hitachi, Volvo, Hyundai, Kobelco, Sumitomo, Kato, Doosan, JCB, Sany Heavy Industry, Liugong, XCMG, Zoomlion, etc.; OEM and ODM services are provided.
The Wakestone Machinery Co., Ltd. dealer system can provide you with one-stop purchasing, diversified engineering solutions, and has established long-term cooperative relationships with customers from all over the world. The sales markets include Europe, the United States, the Middle East, Southeast Asia, etc.
Guangzhou Zhenhui Machinery Co., Ltd. cherishes the trust of customers, attaches great importance to product quality, provides high-quality products and services, and creates the greatest value for customers is our responsibility. We pay attention to customer needs and seek opportunities for win-win cooperation!