PSVD2-21 Pilot Pump for excavators spare parts

Short Description:

The PSVD2-21 pilot pump is a factory-original high-precision hydraulic gear pilot pump specially matched with Doosan PSVD2-21 series main piston pumps, widely applied to 5–8 ton mini Doosan excavators including DH55, DH60, DX55, DX60 and other mainstream compact excavator models.

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Product Detail

Product Tags

description

The PSVD2-21 pilot pump adopts 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 Doosan 5–8 ton mini excavator PSVD2-21 main pumps. Different from ordinary universal pilot pumps with poor low-pressure matching accuracy and unstable fine-control output for Doosan 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 earthwork.

product parameters

Product Model: PSVD2-21 Pilot Pump

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

Applicable Main Pump: Doosan PSVD2-21 Hydraulic Piston Main Pump

Applicable Equipment: 5–8 Ton Doosan Mini Excavators (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

Supporting Matching Parts: PSVD2-21 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 Doosan PSVD2-21 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 Doosan 5–8 ton 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 Doosan 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 Doosan 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 PSVD2-21 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 PSVD2-21 main pump low-load variable adjustment, minor pump body oil leakage and faint abnormal operating noise under light load.
Q2: Why do Doosan 5–8 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 PSVD2-21 pilot pump can restore original factory precise micro-control performance.
Q3: How to maintain PSVD2-21 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 PSVD2-21 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.