AP2D25-36 Pilot Pump for excavators spare parts

Short Description:

The AP2D25/36 pilot pump is a factory-original high-precision hydraulic gear pilot pump specially matched with Hyundai AP2D25 and AP2D36 series main piston pumps, widely applied to 5–7 ton mini excavators of Hyundai and Doosan mainstream models including Hyundai R55, R60 and Doosan DH55, DH60, DX55, DX60.

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Product Detail

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description

The AP2D25/36 pilot pump adopts an upgraded ultra-miniature precision reinforced gear pump structure, professionally optimized for the low-pressure, ultra-small flow, long-term light-load continuous operation and frequent micro-variable-load switching characteristics of AP2D25/36 main pumps matched for 5–7 ton mini excavators. Different from ordinary universal pilot pumps with poor low-pressure matching accuracy and unstable fine-control output for mini excavator hydraulic systems, this model strictly follows original factory supporting standards, with fully standardized mounting dimensions and accurate hydraulic calibration parameters, achieving ultra-low internal leakage and linear stable flow-pressure output under long-term light-load operation. Equipped with ultra-micro precision wear-resistant alloy gear pair, anti-fatigue compact reinforced bearing assembly and high-temperature aging-resistant composite sealing system, it can maintain stable low-pressure pilot output without performance attenuation under long-term mild hydraulic impact and high-frequency fine action switching. The integrated ultra-compact high-rigidity pump body features excellent vibration resistance, dust resistance and sediment corrosion resistance, fully adapting to fine and complex construction environments such as municipal micro-renovation, garden greening and narrow-site trench excavation.

product parameters

Product Model: AP2D25/36 Pilot Pump

Product Type: Ultra-small Flow Negative Flow Control Precision Hydraulic Gear Pilot Pump

Applicable Main Pump: Hyundai AP2D25 / AP2D36 Hydraulic Piston Main Pump

Applicable Equipment: 5–7 Ton Mini Excavators (Hyundai R55/R60, Doosan DH55/DH60/DX55/DX60)

Structural Feature: Ultra-low Flow Pulsation, Low-pressure Constant Output, Ultra-low Internal Leakage, Ultra-compact Miniature Reinforced Structure

Core Structure: Ultra-micro Precision Wear-resistant Alloy Gear Set, Compact Anti-fatigue Bearing Assembly, High-temperature Resistant Sealing System, Integrated Ultra-compact High-rigidity Pump Body

Working Characteristics: Ultra-sensitive Low-pressure Response, Stable Idle & Light-load Pressure, Low Vibration & Low Noise, Wear and Aging Resistant

Core Function: Provide Standard Stable Low-pressure Pilot Pressure, Drive AP2D25/36 Main Pump Variable Adjustment and Whole Machine Light-load Fine Compound Hydraulic Actions, Ensure Flexible and Accurate Micro-operation

Applicable Working Conditions: Municipal Fine Renovation, Garden Greening, Narrow-site Trenching, Long-term Light-load Continuous Operation

Supporting Matching Parts: AP2D25/36 Main Pump, Ultra-small Flow Main Control Valve, Negative Flow Pilot Valve Group, High-precision Mini Hydraulic Filter and Supporting Pipeline

advantages

Professionally calibrated exclusively for AP2D25/36 negative flow hydraulic system, perfectly matching original ultra-compact installation size and low-pressure pilot parameters, supporting 1:1 non-destructive plug-and-play replacement for 5–7 ton Hyundai and Doosan mini excavators, no equipment modification required, 100% system matching with zero adaptation faults.
Adopting ultra-small-flow low-pulsation constant-pressure output technology dedicated for mini excavator low-pressure systems, it effectively stabilizes low-pressure fluctuation and slight pressure drop caused by frequent fine micro-actions and long-term light-load operation, thoroughly solving common pain points such as insensitive micro-operation, weak fine digging power and walking creeping of 5–7 ton mini excavators in fine construction scenarios.
Ultra-micro precision alloy gear pair and compact reinforced anti-fatigue bearing structure optimize low-load wear resistance and micro-control stability, adapting to long-term continuous light-load cycle operation of 5–7 ton mini excavators, maintaining stable low-pressure pilot output without fine-control performance attenuation or operation fatigue.
Premium anti-aging and high-temperature resistant composite sealing system resists long-term mild hydraulic cycle impact and ambient temperature changes, completely eliminating slight oil leakage and low-pressure system pressure loss, effectively reducing minor daily failure rate and routine maintenance costs for mini hydraulic equipment.

FAQ

Q1: What are the common failure symptoms of AP2D25/36 pilot pump?
A: Typical faults include insensitive fine micro-operation response, weak light-load compound digging actions, unstable idle low pilot pressure, walking creeping and slight deviation, unsmooth swing rotation, sluggish AP2D25/36 main pump low-load variable adjustment, minor pump body oil leakage and faint abnormal operating noise under light load.
Q2: Why do 5–7 ton mini excavators have inaccurate fine trimming operation?
A: Long-term light-load cycle operation and frequent micro-action switching cause minor wear of internal ultra-micro precision gears and bearings of the pilot pump, increased slight internal leakage and decreased low pilot pressure, resulting in delayed main pump low-load variable response and insufficient fine-tuning hydraulic power. Replacing the aging AP2D25/36 pilot pump can restore original factory precise micro-control performance.
Q3: How to maintain AP2D25/36 pilot pump daily?
A: Keep the ultra-small-flow hydraulic system oil highly clean, regularly replace hydraulic oil and mini fine filter elements to prevent tiny dust and sediment impurities from wearing ultra-micro precision internal components. Regularly check the pump body for slight oil leakage and faint abnormal noise to ensure stable low-pressure pilot output and sensitive main pump variable operation.
Q4: How to extend the service life of AP2D25/36 pilot pump?
A: Avoid long-term continuous light overload operation and frequent sudden micro-load impact, maintain hydraulic system cleanliness, reduce micro-wear and fatigue loss of internal precision components, and effectively extend the service life of the ultra-small-flow mini pilot 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.