M5X250CHB Swing Motor
2 month ago
Product details
M5X250CHB Swing Motor
The Kawasaki M5X250CHB is a swash-plate axial piston swing motor integrated with a reduction gear and brake, specially designed for 360° slewing drive of 50-ton class excavators and heavy-duty machinery.
1. Model Code Explanation
- M5X: Kawasaki M5X series swing motor
- 250: Displacement: 250.1 cm³/r
- CHB: Configuration code (integrated brake, valve assembly and mounting flange)
2. Main Technical Parameters (M5X250CHB + RG27D Reducer)
- Displacement: 250.1 cm³/r
- Rated Pressure: 27.5 MPa (275 bar)
- Maximum Pressure: 35 MPa (350 bar)
- Maximum Flow: 380 L/min
- Gear Ratio: 19.5 / 25.2 (RG27D)
- Rated Output Torque: 21,424 N·m
- Maximum Speed: 77.6 rpm
- Weight: Approx. 180–220 kg
- Brake: Built-in wet multi-disc parking brake
3. Structural Features
- Integrated design combining motor, two-stage planetary reducer, brake and control valve for compact structure
- Fixed-displacement swash-plate piston design with high efficiency and quick response
- Built-in valve assembly including relief valve and charge valve to simplify pipeline layout
- High-strength alloy housing, impact and high pressure resistant
- Flange mounting for direct connection with reducer gear ring, easy installation
4. Compatible Models
- Sany: SY485, SY485C, SY485H (50-ton class)
- Volvo: EC700 (Part No. VOE14631507 / 14535293)
- XCMG: XE490, XE900 (dual-motor configuration)
- Others: 50-ton class excavators, large material handlers, crawler cranes and other heavy equipment
5. Main Functions
- Drives full 360° continuous slewing of upper structure
- Delivers high torque and low rotational speed output
- Built-in brake ensures accurate positioning and anti-rollback performance
- Suitable for heavy-load and frequent start-stop working conditions
I. Core Components
1. Hydraulic Pump Assembly
• Model: Various models are compatible with CAT307 excavators, such as K3V series (e.g., K3V112DT/BDT). The specific model depends on the actual configuration of the equipment.
• Function: Serves as the power core of the hydraulic system, responsible for providing high-pressure hydraulic oil to drive the excavator's boom, arm, bucket, swing, and travel actuators.
2. Pump Cylinder Block (Pump Barrel)
• Material: High-strength alloy steel, ensuring wear resistance and pressure resistance.
• Function: Houses the pistons and guides their reciprocating motion to achieve the intake and discharge of hydraulic oil.
3. Pistons
• Function: Move reciprocally under the drive of the main shaft, changing the volume inside the pump cylinder block to generate hydraulic pressure.
• Characteristics: Require high wear resistance and fatigue strength to ensure long-term stable operation.
4. Port Plate
• Function: Controls the flow direction of hydraulic oil, ensuring that the pistons do not mix the intake and discharge of hydraulic oil.
• Precision: The machining accuracy of the port plate directly affects the efficiency and lifespan of the pump.
II. Auxiliary Components
1. Seal Kit
• Contents: Includes O-rings, oil seals, etc., typically made of nitrile rubber (NBR) or fluororubber (FKM).
• Function: Prevents hydraulic oil leakage, ensuring the sealing performance of the pump.
2. Bearings and Bushings
• Function: Support rotating components such as the main shaft and pistons, reducing wear and extending the lifespan of the pump body.
3. Retainer Plate
• Function: Helps the pistons quickly return to the intake position after completing the discharge action, preparing for the next cycle.
4. Check Balls
• Function: Used as check valves in some hydraulic pumps to control the one-way flow of hydraulic oil.
III. Wear Parts and Spare Parts
1. Yoke Assembly
• Function: Adjusts the displacement of the pump to meet the demands of different operating conditions.
• Characteristics: Prone to wear and requires regular inspection and replacement.
2. Swashplate Assembly
• Function: Converts the rotational motion of the main shaft into the reciprocating motion of the pistons.
• Characteristics: Complex structure, containing multiple wear parts such as the swashplate seat assembly, springs, and pins.
3. Pilot Pump/Gear Pump
• Function: Provides pilot pressure oil to the hydraulic system to control the displacement and direction of the main pump.
• Compatible Models: Such as the A10VD43 hydraulic pump tail pump, suitable for CAT307, CAT308, and Sumitomo 60 excavators (70B model).
IV. Compatible Models and Extended Applications
1. Primary Compatible Models
• Caterpillar 307 series excavators, including CAT307C, CAT307D, CAT307E, etc.
2. Extended Applications
• Some spare parts may also be used for the repair and replacement of other Caterpillar excavator models, such as CAT305.5 and CAT306E, but specific model compatibility must be confirmed.
• They can also be used for the repair and replacement of excavators from other brands like Hyundai and Doosan, but model compatibility must also be verified.
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