SBS120D Pilot Pump for excavators spare parts

Short Description:

The SBS120D pilot pump is an original high-precision hydraulic gear pilot pump specially matched with CAT SBS120D series main piston pumps, widely applicable to 20-ton class CAT excavators including 320C, 320D and 323D.

Send email to us

Product Detail

Product Tags

description

The SBS120D pilot pump adopts upgraded precision reinforced gear pump structure, professionally optimized for the medium-pressure, medium-flow, long-term continuous operation and frequent variable-load switching characteristics of CAT SBS120D main pump supporting 20-ton excavators. Different from ordinary universal pilot pumps with poor matching accuracy and easy pressure drop for CAT hydraulic systems, this model strictly follows CAT 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 medium-heavy load operation. Equipped with high-hardness wear-resistant alloy gear pair, anti-fatigue reinforced bearing assembly and high-temperature high-pressure aging-resistant composite sealing system, it can maintain stable pilot pressure output without performance attenuation under long-term cyclic hydraulic impact and high-intensity compound action switching. The integrated high-rigidity pump body features excellent vibration resistance, dust resistance and sediment corrosion resistance, fully adapting to complex construction environments such as earthwork, municipal renovation and road engineering.

product parameters

Product Model: SBS120D Pilot Pump

Product Type: Medium Flow Negative Flow Control Precision Hydraulic Gear Pilot Pump

Applicable Main Pump: CAT SBS120D Hydraulic Piston Main Pump

Applicable Equipment: 20 Ton Class CAT Excavators (320C/320D/323D)

Structural Feature: Low Flow Pulsation, Medium-pressure Constant Output, Ultra-low Internal Leakage, Precision Reinforced Wear-resistant Structure

Core Structure: High Hardness Wear-resistant Alloy Gear Set, Anti-fatigue Reinforced Bearing Assembly, High-pressure High-temperature Resistant Sealing System, Integrated High-rigidity Pump Body

Core Function: Provide Standard Stable Pilot Pressure, Drive SBS120D Main Pump Variable Adjustment and Whole Machine Medium-heavy Load Compound Hydraulic Actions, Ensure Smooth and Sensitive Operation

Applicable Working Conditions: Earthwork Excavation, Municipal Renovation, Road Construction, Long-term Medium-heavy Load Continuous Operation

Supporting Matching Parts: SBS120D Main Pump, Medium-flow Main Control Valve, Negative Flow Pilot Valve Group, High-precision Hydraulic Filter and Supporting Pipeline

advantages

Professionally calibrated for CAT SBS120D negative flow hydraulic system, perfectly matching original installation size and pilot pressure parameters, supporting 1:1 non-destructive plug-and-play replacement for CAT 320C/320D/323D excavators, no equipment modification required, 100% system matching with zero adaptation faults.
Adopting medium-flow low-pulsation constant-pressure output technology exclusive for CAT negative flow systems, it effectively stabilizes pilot pressure fluctuation and pressure drop caused by frequent compound action switching and medium-heavy load operation, thoroughly solving common problems such as slow response, weak digging power and walking jitter of 20-ton CAT excavators in daily construction.
High-hardness alloy gear pair and reinforced anti-fatigue bearing structure improve overall wear resistance and operational stability, adapting to long-term continuous medium-heavy load operation of 20-ton CAT excavators, maintaining stable pilot pressure output without performance attenuation or operation fatigue.
Premium anti-aging and high-temperature resistant composite sealing system resists long-term hydraulic cyclic impact and temperature changes, completely eliminating oil leakage and system pressure loss, effectively reducing daily equipment failure rate and maintenance costs for CAT construction equipment.

FAQ

Q1: What are the common failure symptoms of SBS120D pilot pump?
A: Typical faults include slow medium-heavy load operation response, weak boom/arm/bucket compound digging actions, unstable idle pilot pressure, walking jitter and deviation, sluggish swing rotation, insensitive main pump variable adjustment, pump body oil leakage and abnormal operating noise under load.
Q2: Why do CAT 320C/320D excavators operate sluggishly after long working hours?
A: Long-term medium-heavy load operation and frequent load switching cause wear of internal precision gears and bearings of the pilot pump, increased internal leakage and decreased pilot pressure, resulting in delayed main pump variable response and insufficient hydraulic power. Replacing the aging SBS120D pilot pump can restore original control performance.
Q3: How to maintain SBS120D pilot pump daily?
A: Keep the medium-flow hydraulic system oil clean, regularly replace hydraulic oil and filter elements to prevent hard impurities from wearing precision internal components. Regularly check the pump body for oil leakage and abnormal noise to ensure stable pilot pressure output and sensitive main pump variable operation.
Q4: How to extend the service life of SBS120D pilot pump?
A: Avoid long-term continuous overload operation and frequent sudden load impact, maintain hydraulic system cleanliness, reduce internal component wear and fatigue loss, and effectively extend the service life of the 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.