M5X180CHB-10A-4AA/330 Kawasaki Swing Motor 180cc ZX330

Product Overview

The M5X180CHB-10A-4AA/330 is a swash plate axial piston fixed displacement swing motor built on the Kawasaki Precision Machinery (KPM) M5X series platform, in the M5X180 displacement size (180.1 cm³/rev). The motor features a swash plate design with axial piston/slipper arrangement, with a mechanical brake, relief valve, and make-up valve built into the motor section, enabling swing function simply by connecting the piping from the control valve to the motor port.

The M5X series is Kawasaki’s upgraded series developed on M2X technology, aiming for lighter weight, more compact dimensions, and stronger output power. The M5X series design achieves an extraordinarily compact motor with the piston/cylinder part, mechanical brake part, and attached valve part neatly arranged. The M5X180 has mature application validation in Hitachi ZX330-3/ZX350-3/ZX350-5G/ZX360W-3/ZX400W-3 excavators, serving as the original equipment motor for the swing system of these machines.

The model code M5X180CHB-10A-4AA/330 decodes as follows: M5X180 designates the series and displacement size (swash plate fixed motor, 180.1 cm³/rev), CHB is the integrated brake and valve type code (CHB type with built-in mechanical brake, relief valve, and make-up valve), 10A is the mounting flange and port configuration code, 4AA is the shaft type and special option code, and 330 is the pressure rating code (330 kgf/cm² = 32.4 MPa). Specific suffix meaning should be confirmed with Kawasaki or an authorized dealer through the complete selection manual.

Engineered as a form-fit-function replacement for original Kawasaki/KPM M5X180CHB series motors, this model maintains identical mounting flange dimensions, shaft specifications, and port locations, enabling drop-in interchangeability without modification to the host machine’s mounting interface or hydraulic circuit. Each unit undergoes 100% simulated load testing prior to shipment, validating output torque and volumetric efficiency against original specifications.

Technical Specifications 

• Model: M5X180CHB-10A-4AA/330

• Original Brand: Kawasaki Precision Machinery (KPM)

• Series: M5X Series Swash Plate Fixed Displacement Swing Motor (CHB type)

• Motor Type: Swash plate axial piston fixed displacement motor

• Design Feature: Swash plate configuration, axial piston/slipper arrangement, fixed displacement, integrated mechanical brake, integrated relief and make-up valves

• Displacement: 180.1 cm³/rev (10.99 in³/rev)

• Rated Pressure: 32.4 MPa (330 kgf/cm² / 4,700 psi)

• Maximum Pressure: 39.2 MPa (400 kgf/cm² / 5,686 psi)

• Maximum Speed: 1,680 rpm

• Rated Output Torque: 932 N·m (95 kgf·m)

• Rated Output Power: 163 kW

• Maximum Applicable Brake Torque: 1,250 N·m (127 kgf·m)

• Brake Release Pressure: 3.3 MPa (33 kgf/cm²)

• Number of Spline Teeth: 16 (JIS involute spline, module 2.5)

• Weight (approx.): 61 kg

• Mounting: Flange mounting, direct connection to reduction gear ring gear

• Circuit: Open circuit

• Compatible Machines: Hitachi ZX330-3/ZX350-3/ZX350-5G/ZX360W-3/ZX400W-3, Kobelco SK350-8, Volvo EC240B/EC300, SANY SY215/SY235/SY365, Hyundai R290LC-7/R305LC-7, etc.

Data Limitation Note: The displacement, pressure, torque, speed, and weight data for the M5X180CHB-10A-4AA/330 are sourced from the Kawasaki official M2X/M5X series technical manual (M5X180-169 model data) and authorized distributor publicly available technical data. Different suffix configurations of the M5X180 series (such as -10A-01D330, -10A-64B/330, -10A-01C/320, -10A-4AA/330) may differ in mounting flange, port configuration, shaft type, and pressure rating. Specific details are subject to the original nameplate and selection manual.

Key Technical Advantages

1. Swash Plate Axial Piston Design with High Power Density

The M5X180CHB-10A-4AA/330 employs Kawasaki’s M5X series swash plate design developed on M2X technology, with axial pistons and slippers arranged in parallel, changing piston stroke through a tiltable swash plate. The M5X series design achieves an extraordinarily compact motor with the piston/cylinder part, mechanical brake part, and attached valve part neatly arranged. At 180.1 cm³/rev displacement, the motor delivers a rated output torque of 932 N·m and rated output power of 163 kW, offering superior power density compared to conventional swing motors of the same displacement class.

2. Integrated Mechanical Brake for Slope Safety

The M5X180CHB features a mechanical brake built into the motor section, operating on a spring-applied, hydraulically-released principle, automatically locking the swing mechanism when hydraulic pressure drops to ensure safe parking of the excavator on slopes. The maximum applicable brake torque is 1,250 N·m, with brake release pressure of 3.3 MPa. This design eliminates the need for external brake installation within the limited swing platform interior space, simplifying system integration.

3. Integrated Relief and Make-Up Valves for Swing Function

The M5X series motor has built-in relief valve and make-up valve elements, enabling swing function simply by connecting the piping from the control valve to the motor port, greatly simplifying system piping design. This design reduces external connection points and leakage risks, with the built-in relief valve automatically limiting hydraulic shock peaks during swing start and stop, ensuring smooth rotation of the upper structure. The M5X series motor offers high mechanical and volumetric efficiency, large starting torque (starting mechanical efficiency above 0.9), and good low-speed stability, capable of smooth operation at very low speeds.

4. Compact Structure with Direct Reduction Gear Integration

The M5X series motor’s mounting flange has been widened to enable direct connection with the ring gear of a reduction gear for an extremely compact installation. This design eliminates couplings and external mounting brackets within the limited swing platform interior space of excavators, reducing system component count and potential failure points. The M5X series is also available with a reduction gear in the M5X-RG series, featuring a two-stage planetary gear covering multiple gear ratios, suitable for swing drive requirements of medium-to-large excavators. The motor features a JIS involute spline (16 teeth, module 2.5) shaft, ensuring high-precision meshing with the reduction gear input.

Application Areas

• Hitachi Excavators: ZX330-3, ZX350-3, ZX350-5G, ZX360W-3, ZX400W-3, etc. (original equipment motor, part numbers 4616985/4419718)

• Kobelco Excavators: SK350-8, etc.

• Volvo Excavators: EC240B, EC300, etc.

• SANY Excavators: SY215, SY235-8/SY235-9, SY365, SY310, SY330, SY360, etc.

• Hyundai Excavators: R290LC-7, R305LC-7, etc.

• Caterpillar Excavators: CAT 330C, E330D, E336D, etc.

• Other Construction Machinery: JCB JS330/JS360, SH360 and other excavator swing drive systems

Expert Maintenance Tips

1. Hydraulic Fluid Cleanliness Control: The M5X180CHB-10A-4AA/330 features precision clearances in the piston and distribution pairs. Maintain hydraulic fluid cleanliness at ISO 18/15 or NAS Level 9 or better. Replace hydraulic fluid and filter elements every 1,000 operating hours or annually, with filter element filtration accuracy no less than 10 μm.

2. Brake Performance Testing: Periodically check the integrated mechanical brake effectiveness. Brake release pressure is 3.3 MPa, with maximum applicable brake torque of 1,250 N·m. Ensure the swing mechanism locks reliably when brake supply pressure is zero; otherwise, inspect brake springs and friction plate wear.

3. Built-in Relief Valve Setting Verification: Verify the built-in relief valve opening pressure every 1,000 operating hours, ensuring it provides proper cushioning during swing start and stop. If swing action exhibits shock or abnormal noise, inspect valve function.

4. Mounting Alignment Requirements: During installation, ensure the motor output shaft (16-tooth JIS involute spline) and swing bearing gear or reduction gear input mesh precision. Flange faces must be clean and burr-free, with bolts tightened diagonally to the specified torque. Apply appropriate grease to spline mating surfaces to prevent corrosion.

5. Case Drain Leakage Monitoring: Inspect case drain leakage every 500 operating hours; normal leakage should remain below 2 L/min. A sudden increase indicates potential wear on piston pairs or the distribution plate.

6. Restart After Extended Storage: For motors stored over 6 months, manually rotate to confirm free rotation before restart. Run at low pressure under no load for 10 minutes, confirming normal case temperature and leakage before gradually applying load.