Kawasaki A4VG40 Hydraulic Pump for Excavator spare parts

Kawasaki A4VG40 Hydraulic Pump for Excavator spare parts Featured Image
  • Kawasaki A4VG40 Hydraulic Pump for Excavator spare parts
  • Kawasaki A4VG40 Hydraulic Pump for Excavator spare parts
  • Kawasaki A4VG40 Hydraulic Pump for Excavator spare parts
  • Kawasaki A4VG40 Hydraulic Pump for Excavator spare parts
  • Kawasaki A4VG40 Hydraulic Pump for Excavator spare parts

Short Description:

The A4VG28 hydraulic pump is a high-precision closed-circuit variable axial piston pump originating from the classic Rexroth A4VG series, specially designed for light-duty and mini engineering machinery hydraulic drive systems.

Product Detail

Product Tags

description

The A4VG40 closed-circuit variable pump adopts an upgraded reinforced swash plate variable structure, optimized for medium-load closed hydraulic system working conditions. Compared with the A4VG28, the internal flow channel area and piston pressure-bearing specification are comprehensively upgraded, achieving higher volumetric efficiency and stronger medium-load impact resistance. Core components including piston assembly, cylinder block and valve plate are made of high-density wear-resistant alloy, processed by multi-stage precision lapping and adaptive gap matching technology, effectively suppressing internal leakage and flow loss under medium and variable load conditions. Equipped with an enhanced load-sensitive pressure feedback variable mechanism, it can quickly respond to walking load changes, automatically adjust displacement and output flow, realizing stepless and stable speed regulation from no-load to medium-load operation without stalling or jitter. The optimized large-flow circulating oil replenishment and heat dissipation system strengthens closed-circuit oil circulation efficiency, significantly reduces heat accumulation during long-term medium-load walking and frequent forward-reverse switching, avoiding high-temperature power drop and oil aging failure.

product parameters

Product Model: A4VG40 Closed-Circuit Variable Piston Pump
Product Type: A4VG Series 40ml/r Medium-Flow Compact Hydraulic Variable Pump
Applicable Equipment: 3–6 Ton Small Excavators, Medium Road Rollers, Small Skid Steers, Compact Pavers
Structural Features: Reinforced Swash Plate Structure, Enhanced Load-Sensing Variable, Large-Flow Circulating Heat Dissipation, Medium-Load Anti-Attenuation Design, High Precision Sealing Matching
Core Material: High-Density Wear-Resistant Alloy Core + High-Rigidity Integral Cast Pump Housing
Working Performance: Sufficient Medium-Load Flow Reserve, Fast Load Response, Low Thermal Attenuation, Stepless Stable Speed Regulation, Ultra-Low Long-Term Internal Leakage
Core Functions: Provide Stable Medium-Power Closed-Circuit Walking Power for Small Machinery, Upgrade System Flow Output, Improve Medium-Load Construction Efficiency and Climbing Performance
Applicable Scenarios: Small-Scale Earthwork Shoveling, Pavement Compaction, Narrow Space Continuous Operation, Frequent Forward-Reverse Switching, Medium-Load Long-Distance Walking
Matching Parts: A4VG40 Series Supporting Walking Motor, Medium-Flow Closed-Circuit Pipeline, Load-Sensing Control Valve Group

advantages

  • 40ml/r Mid-Range Flow Upgrade, Medium-Load Power Surplus: Compared with the 28ml/r ultra-small displacement pump, the A4VG40 has significantly upgraded flow and pressure reserve, solving the bottleneck of insufficient power and weak climbing ability of 3–6 ton equipment under medium-load earthwork and slope operation. It achieves perfect power matching for small and medium closed-circuit hydraulic systems, balancing energy saving and construction power.
  • Q4: What is the difference between A4VG40 and A4VG28? A: A4VG28 is positioned for 1–3 ton ultra-light load mini machinery, suitable for light-duty and narrow-space operation; A4VG40 is an upgraded medium-flow version for 3–6 ton medium-load scenarios, with larger flow reserve, stronger climbing performance and better continuous operation stability, solving the power shortage of small-displacement pumps under medium load.
  • - Reinforced Structural Design, Strong Impact Resistance: The swash plate, piston assembly and cylinder block are structurally optimized for medium-load impact working conditions, with higher structural rigidity and wear resistance. It suppresses internal leakage and performance aging caused by long-term variable load operation, maintaining consistent hydraulic performance throughout the equipment life cycle.

FAQ

Q1: What equipment is the A4VG40 suitable for?
A: The A4VG40 medium-flow closed-circuit variable pump is specially developed for 3–6 ton small construction machinery, widely applicable to small excavators, medium road rollers, small skid steer loaders and compact pavers. It is the best upgrade replacement for equipment with insufficient walking power of A4VG28.
Q2: What symptoms require replacing the A4VG40 pump?

A: If the equipment has weak climbing power, slow medium-load walking, obvious speed drop during frequent commutation, long-term high-temperature heat generation and gradual walking weakness after aging, the original small-displacement pump has insufficient medium-load performance, and replacement with A4VG40 can restore full medium-load walking performance.

- Q3: Is on-site modification required for installation?
A: No modification, pipeline adjustment or parameter calibration is required. The A4VG40 adopts OEM standard installation interface, realizing plug-and-play direct replacement and rapid on-site maintenance and upgrade.
- Q4: What is the difference between A4VG40 and A4VG28?
A: A4VG28 is positioned for 1–3 ton ultra-light load mini machinery, suitable for light-duty and narrow-space operation; A4VG40 is an upgraded medium-flow version for 3–6 ton medium-load scenarios, with larger flow reserve, stronger climbing performance and better continuous operation stability, solving the power shortage of small-displacement pumps under medium load.

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.

our warehouse

our warehouse

Pack and ship

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