M5X130CHB SWING MOTOR
2 month ago
Product details
1. Model Breakdown
• M5X130CHB:
• M5X: Hitachi Construction Machinery swing motor series code, indicating high-pressure, large-displacement design.
• 130: Theoretical displacement (unit: cm³/rev), meaning 130 mL of hydraulic oil output per revolution.
• CHB: Design variant identifier, possibly representing structural optimizations (e.g., sealing system, bearing configuration, or mounting interface).
• (E320C):
• Compatible with Caterpillar320C series excavators, indicating the motor is an OEM or aftermarket replacement part for the E320C hydraulic system.
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2. Applications
• Primary Function: Drives the360° rotationof the excavator’s upper structure (cab and working attachments) for rapid steering and precise positioning.
• Compatible Models:
• Caterpillar 320C series excavators (including variants like 320C L, 320C FM).
• Also suitable for retrofitting other brands’ 20–25-ton excavators with similar hydraulic systems.
• Typical Working Conditions:
• Earthmoving, mining, demolition, and other applications requiring frequent rotational movements.
• Operates under high loads, shocks, vibrations, and harsh environments (e.g., dust, mud).
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3. Core Technical Specifications
【表格】
Parameter M5X130CHB(E320C) Specifications
Theoretical Displacement 130 cm³/rev (7.93 in³/rev)
Rated Pressure 28 MPa (4,060 psi)
Peak Pressure 32 MPa (4,640 psi)
Speed Range 0–15 rpm (low-speed, high-torque)
Drive Power Max. 55 kW (74 HP)
Weight Approx. 120 kg (265 lbs)
Port Sizes Inlet: G1¼ (BSPP); Outlet: G1
Recommended Hydraulic Oil Mineral-based hydraulic oil (ISO VG 46)
Operating Temperature -20°C to +80°C (-4°F to +176°F)
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4. Key Design Features
• High-Pressure Durability:
• Uses Hitachi’s patentedaxial piston swashplate designwith a high-strength alloy steel cylinder block, capable of sustained 32 MPa peak pressure.
• Low-Speed, High-Torque Output:
• Optimized swashplate angle and piston porting ensure smooth torque delivery at 0–15 rpm, preventing startup jitters.
• Sealing and Reliability:
• Dual dynamic seals (lip seal + dust wiper) prevent hydraulic oil leakage and contaminant ingress.
• Bearings feature aroller-thrust combination designto distribute rotational impact forces and extend service life.
• Compatibility:
• Mounting flange matches Caterpillar E320C OEM specifications, allowing direct replacement without hydraulic line modifications.
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5. Common Failures and Maintenance
• Typical Issues:
• Weak/Stuck Rotation: Caused by contaminated hydraulic oil wearing the port plate; requires port plate replacement and system flushing.
• Abnormal Noise: Bearing failure or loose swashplate bolts; disassembly and bearing replacement needed.
• Oil Leakage: Aged seals; replace O-rings or lip seals.
• Maintenance Recommendations:
• Inspect oil level and cleanliness every 500 hours; replace hydraulic oil and filters every 2,000 hours.
• Avoid prolonged low-speed idling to prevent oil overheating.
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6. Comparison with OEM Parts
【表格】
Feature M5X130CHB(E320C) Caterpillar OEM Motor
Price ~60–70% of OEM cost High (due to brand premium)
Lead Time 2–4 weeks (in-stock) 4–8 weeks (requires overseas shipping)
Performance Match 100% compatible with E320C hydraulic system OEM standard
Warranty 12 months (non-human damage) 24 months (requires registration)
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7. Selection Recommendations
• Ideal For:
• E320C owners seeking cost-effective performance.
• Emergency repairs requiring a temporary OEM alternative.
• Precautions:
• Verify motor serial number matches the equipment (some E320C sub-models may require displacement adjustments).
• Professional technicians should calibrate swing pressure settings during initial installation.
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Ningbo Hengnuo Hydraulic Drive Co.,Ltd
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