Kawasaki A4VG28 Hydraulic Pump for Excavator spare parts

Kawasaki A4VG28 Hydraulic Pump for Excavator spare parts Featured Image
  • Kawasaki A4VG28 Hydraulic Pump for Excavator spare parts
  • Kawasaki A4VG28 Hydraulic Pump for Excavator spare parts
  • Kawasaki A4VG28 Hydraulic Pump for Excavator spare parts

Short Description:

The M5X180 hydraulic motor is a heavy-duty high-torque swing motor upgraded for large-tonnage excavators, belonging to the high-load flagship model of the M5 series rotary power matrix.

Product Detail

Product Tags

description

The A4VG28 closed-circuit variable pump adopts a mature swash plate variable structure optimized for light-duty closed hydraulic systems, with miniaturized integrated design and ultra-high space utilization. The core piston assembly, cylinder block and valve plate are made of high-precision wear-resistant alloy materials, processed by multi-stage fine grinding and gap micro-matching technology, achieving ultra-low internal leakage and high volumetric efficiency under low-displacement variable working conditions. Equipped with an intelligent pressure feedback variable mechanism, it can automatically adjust displacement and output torque according to equipment walking load changes, realizing stepless stable speed regulation and perfect matching of walking power demand. The built-in high-efficiency auxiliary oil replenishment and heat dissipation structure optimizes the closed-circuit oil circulation logic, effectively reducing system heat accumulation during frequent forward-reverse switching and low-speed continuous operation, solving the high-temperature heating and power attenuation problems of traditional small closed pumps.

product parameters

Product Model: A4VG28 Closed-Circuit Variable Piston Pump
Product Type: A4VG Series 28ml/r Ultra-Compact Hydraulic Variable Pump
Applicable Equipment: 1–3 Ton Mini Excavators, Small Road Rollers, Skid Steer Loaders, Mini Pavers
Structural Features: Miniaturized Integrated Structure, Pressure Feedback Variable Control, Built-In Oil Replenishment System, Low-Noise Operation, High-Efficiency Closed-Circuit Transmission
Core Material: High-Precision Wear-Resistant Alloy Core + High-Rigidity Cast Alloy Pump Housing
Applicable Scenarios: Miniature Earthwork Construction, Road Surface Compaction, Narrow Space Operation, Frequent Forward-Reverse Switching, Low-Speed Continuous Walking
Matching Parts: A4VG Series Supporting Walking Motor, Closed-Circuit High-Pressure Pipeline, Precision Pressure Control Valve Group
Matching System Pressure: Standard high-pressure closed-circuit system for mini light-duty machinery
Variable Performance: Automatic load sensing variable, stepless speed regulation without jitter
Heat Dissipation Performance: Built-in circulating oil replenishment heat dissipation, low heat generation in long-term operation
Installation Mode: Standard OEM mounting interface, plug-and-play direct replacement without modification
Service Life: Far exceeding ordinary small hydraulic pumps, strong resistance to frequent switching fatigue

advantages

  • Closed-Circuit Pressure Feedback Variable, Stepless Smooth Speed Regulation: Different from the fixed output of open-circuit pumps, the intelligent pressure self-feedback variable system can sense load changes in real time, automatically adjust pump displacement and output power. It ensures stable walking speed during no-load, light-load and variable-load operation, eliminating stalling and jitter of mini equipment during walking and commutation.
  • Built-In Circulating Oil Replenishment, Low Heat & High Efficiency: Upgraded built-in auxiliary oil replenishment and circulating heat dissipation structure, which optimizes closed-circuit oil circulation efficiency, reduces system heat accumulation during frequent forward-reverse switching and long-hour low-speed operation. It effectively avoids high-temperature power attenuation and oil deterioration, maintaining high-efficiency hydraulic transmission all the time.
  • High-Precision Alloy Matching, Ultra-Low Internal Leakage: Core friction pairs adopt multi-stage fine grinding and micro-gap adaptive matching technology, with excellent wear resistance and sealing performance. The ultra-low internal leakage design ensures stable walking power and consistent speed of equipment after long-term operation, avoiding slow walking and power decline caused by aging wear.
  • Strong Anti-Fatigue Performance, Adapt to Frequent Switching Working Conditions: The overall structural rigidity is optimized for frequent start-stop and forward-reverse switching of mini machinery. It can resist long-term variable load impact and mechanical fatigue, adapting to high-intensity continuous operation in narrow and complex construction scenarios, with stable performance and low failure rate.

FAQ

  • Q1: What equipment is the A4VG28 hydraulic pump suitable for?
  • A: The A4VG28 closed-circuit variable pump is exclusively developed for 1–3 ton mini light-duty construction machinery, widely applicable to mini excavators, small road rollers, skid steer loaders, miniature pavers and other mobile small engineering equipment, focusing on closed-circuit walking hydraulic drive scenarios.
  • Q2: What faults need A4VG28 pump replacement?
  • A: If the mini equipment has unstable walking speed, obvious jitter during forward-reverse switching, weak climbing power, slow walking after long-term operation, and frequent high-temperature alarm of hydraulic system, the original pump has severe internal leakage and fatigue aging, and needs to be replaced with A4VG28 to restore stable walking performance.
  • Q3: Is on-site modification required for installation?
  • A: No modification, pipeline adjustment or parameter calibration is required. The A4VG28 fully complies with OEM standard installation specifications for mini light-duty machinery, realizing plug-and-play integral quick replacement and on-site rapid maintenance.
  • Q4: What is the difference between A4VG28 and M2/M5 series products?
  • A: M2 series are open-circuit main pumps for large and medium excavators’ overall power output; M5 series are slewing motors for rotary power; A4VG28 is a professional closed-circuit walking variable pump for mini machinery, focusing on light-load stable walking and efficient transmission, with completely different application scenarios and functional positioning.
  • Q5: How to maintain A4VG28 to extend service life?
  • A: Use low-viscosity high-quality anti-wear hydraulic oil suitable for small closed systems, replace filter elements regularly to keep oil circuit clean; avoid long-term overload walking and frequent violent commutation; regularly check system pressure and oil temperature to prevent high-temperature aging, ensuring long-term stable operation of the pump.

warehouse

We have built four spare parts warehouses in Xuzhou, Jining, Kunshan and Changsha to provide customers from all over the world with a variety of high-quality spare parts. We can basically ship self-provided spare parts within three days after confirming the order. If the spare parts need to be adjusted or processed, they will be shipped within 7-30 days.

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our warehouse

Pack and ship

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