M5X180CHB-10A-BDA/265 Swing Motor GP | SANY SY330H SY335 Excavator

The swing motor is the heart of an excavator’s rotating function. For SANY SY330H and SY335 excavators, the M5X180CHB-10A-BDA/265 swing motor GP (also referenced as M5X180CHB swing motor) is a precision-engineered axial piston motor. It converts hydraulic energy into smooth rotational motion. This motor enables 360-degree swinging of the upper structure. Therefore, it is critical for excavator productivity. A failing swing motor can cause slow rotation, erratic movement, or complete swing failure. This OEM-grade swing motor GP restores proper swing performance. As a result, your SANY excavator works efficiently on job sites worldwide.

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What Is a Swing Motor GP?

A swing motor (also called a rotary motor or slewing motor) is a hydraulic motor. It is typically mounted inside the excavator’s turntable. The motor drives a planetary gearbox, which turns the upper structure relative to the undercarriage.

The M5X180CHB is a fixed displacement axial piston motor with a swash plate design. The motor has built-in relief valve and make-up valve elements so as to achieve swing function by the connection of the piping from the control valve to the motor port. The design has enabled an extraordinarily compact motor with the piston/cylinder part, mechanical brake part, and attached valves part neatly arranged respectively. The mounting flange of the motor has been so enlarged as to enable it to be directly connected with the ring gear of a reduction gear.

The “CHB” suffix in the M5X180CHB model typically indicates specific porting, valve configuration, or mounting dimensions. The “BDA/265” suffix generally specifies the particular valve arrangement, pressure settings, or swing brake configuration.

The motor is a swash plate type axial piston hydraulic motor, designed to deliver high torque, high efficiency, and reliable performance for excavator swing applications. It is manufactured by or to the specifications of KPM (Kawasaki Precision Machinery), a leading global brand in hydraulic components.

Key Advantages

Fixed displacement for consistent swing speed. The motor provides reliable rotation regardless of load variations.
Compact, space-saving design. The mounting flange has been so enlarged as to enable it to be directly connected with the ring gear of a reduction gear.
High torque output. With a displacement of 180.1 cm³/rev, this motor generates substantial torque. The M5X180 swing motor is used in the excavator swing system to drive the rotation of the upper structure, allowing the excavator to swing left and right smoothly during operation.
Integrated valving for swing function. The motor has built-in relief valve and make-up valve elements so as to achieve swing function by the connection of the piping from the control valve to the motor port.
Integrated hydraulic multi-disc brake. The M5X180 swing motor is equipped with an integrated hydraulic multi-disc brake, which helps control swing movement and ensures safe operation when the excavator stops.

Technical Specifications

Part Number: M5X180CHB-10A-BDA/265
Motor Type: Fixed displacement axial piston motor (swash plate design)
Displacement: 180.1 cm³/rev (approximately 180 ml/rev)
Rated Pressure: 32.4 MPa (4700 PSI)
Maximum Pressure: 39.2 MPa (5685 PSI)
Maximum Speed: 1,680 min⁻¹ (RPM)
Mounting: Flange-mount, direct connection to reduction gear ring gear
Brake Type: Integrated hydraulic multi-disc brake
Rotation: Bidirectional (left and right swing)

Compatible SANY Excavator Models

The M5X180CHB swing motor GP is a direct replacement for the following SANY excavator models:

SY330H Series: SY330H (31.5-ton class excavator powered by ISUZU 6HK1)
SY335 Series: SY335, SY335C, SY335H, SY335LC
Additional Models (Verify fitment): SY265C, SY305H, SY305, SY335H, SY375H

SANY SY330H Excavator Specifications (for context):

Operating Weight: 31,500 kg
Engine Model: ISUZU GH-6HK1
Engine Power: 212 kW (288 hp) at 2,000 rpm
Bucket Capacity: 1.65 m³

SANY SY335C Excavator Specifications (for context):

Engine Model: ISUZU 6HK1
Engine Power: 190.5 kW
Operating Weight: 34.3 tons
Swing Speed (Maximum): 9.0 RPM
Swing Pressure (Maximum): 27.5 MPa (3,989 psi)

Component Functions

The M5X180CHB swing motor GP integrates multiple functions into one compact unit:

Hydraulic Motor Section: Converts hydraulic flow into mechanical rotation using axial pistons acting on a swash plate.
Mechanical Brake Section: Contains a spring-applied, hydraulic-release multi-disc brake. The brake engages automatically when swing control is in neutral.
Integrated Valves: Built-in relief valve and make-up valve elements achieve swing function by the connection of the piping from the control valve to the motor port. The motor may also incorporate shockless relief valves, anti-reverse valves, and time-delay valves.

Importance of OEM-Grade Swing Motors

Swing motors are subjected to extreme forces and shock loads. A low-quality aftermarket motor may use inferior materials, leading to premature failure. Therefore, an OEM-grade swing motor GP is recommended.

The M5X series are fixed displacement axial piston motors of swash plate design. The design has enabled an extraordinarily compact motor with the piston/cylinder part, mechanical brake part, and attached valves part neatly arranged respectively.

Signs Your Swing Motor Needs Replacement

Watch for these common failure indicators:

Slow swing speed. The upper structure rotates noticeably slower than normal, even at full engine RPM.
Erratic swing operation. The swing movement is jerky, uneven, or hesitant in either direction.
Swing brake does not hold. The upper structure drifts or creeps when the swing control is in neutral.
Unusual noise from the swing drive area. Grinding, whining, or knocking sounds indicate internal wear or gear damage.
External hydraulic oil leaks. Oil leaking from the motor housing indicates seal failure.
Complete loss of swing function. The upper structure does not rotate in one or both directions.

Installation Recommendations

Follow these steps for proper replacement. First, securely support the upper structure to prevent unintended rotation. Second, release hydraulic tank pressure and disconnect the battery.

Clean the swing drive area thoroughly. Then, disconnect all hydraulic lines. Label them for correct reconnection. Remove the swing motor mounting bolts. Carefully lift the motor from the swing drive.

Clean the mounting surface and inspect the drive gear. Install the new M5X180CHB-10A-BDA/265 swing motor GP with new O-rings. Torque mounting bolts to SANY specifications. Refill hydraulic fluid as needed.

Finally, start the engine at low idle. Cycle the swing function in both directions. Bleed air from the system. Check for leaks and verify proper swing speed.

Conclusion

The M5X180CHB-10A-BDA/265 swing motor GP for SANY SY330H and SY335 excavators is a high-quality, OEM-grade axial piston motor. It provides reliable, powerful, and smooth swing performance. Whether you maintain an SY330H or an SY335, this KPM-spec swing motor restores factory-grade rotation.

Order your M5X180CHB swing motor GP today. Keep your SANY excavator swinging smoothly on every job site.