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RITO Excavator Piston Pump 350-0666 296-6714 20R-4693 Hydraulic Pump 3500666 2966714 20R4693 414E 434E 416E 428E 422E Mian Pump

Sluggish front-loader execution and crawling backhoe extension speeds on your heavy utility machine reveal severe internal fluid pressure erosion across the wear face plates. When abrasive silt particles scratch the high-pressure piston sleeves, the primary pump loses its volumetric holding capacity, turning a versatile multi-functional utility plant into a slow, fuel-wasting jobsite liability. Do not let hidden flow synchronization drops halt your critical 414E, 434E, 416E, 428E, or 422E regional infrastructure schedules.

  • Item NO.:

    350-0666
  • Order(MOQ):

    1
  • Payment:

    T/T, WESTERN UNION, CHINESE BANK,PAYPAL
  • Product Origin:

    JAPAN
  • Lead Time:

    2-3 DAYS
  • Product Details

Reinvigorate your primary fluid propulsion networks with the premium RITO Excavator Piston Pump 350-0666. Configured as a direct factory-spec Hydraulic Pump core, this rugged Mian Pump assembly utilizes vacuum-hardened rotating elements and crisp cross-sensing swashplate pressure regulators to deliver balanced multi-circuit flow parameters, offering global fleet rebuilders a durable, reman-grade upgrade path via reference number 296-6714 or 20R-4693.

350-0666 Hydraulic Pump

 
Product Specifications

Part Number  350-0666 / 296-6714 / 20R-4693 / 3500666 / 2966714 / 20R4693
Part Name Variable Displacement Axial Piston Main Hydraulic Pump
Compatible Brand CAT
Applicable Models Caterpillar 414E, 434E, 416E, 428E, 422E Backhoe Loaders
Application Excavator hydraulic system
Material High Tensile Nodular Cast Iron and Hardened Alloy Steel
Product Color Technical Grey Frame
Working Temperature -25 to 115 degrees Celsius
Key Function High-Pressure Fluid Propulsion and Proportional Variable Flow Commutation Modulation
Condition 100% New, Aftermarket / OEM Quality
Packaging Wooden Case/Reinforced Carton/Neutral Packing / Customized Box

 

Key Features & Advantages


Precision

High-Hardness Axial Variable Piston Core

provides quick pressure compensation under sudden backhoe crowding resistance variations.

Leak-Free

Micro-Finished Spherical Cylinder Blocks

eliminate microscopic sealing gaps, sustaining reliable high volumetric index output at full engine throttle.

Direct Fitment

Thick-Walled Nodular Iron Shell Casting

absorbs aggressive fluid harmonics, protecting surrounding pilot valve line circuits from vibration stress.

Rigorous Testing

Global Supply Tiering

We offer Original, OEM, and high-performance Aftermarket options to provide flexible procurement strategies for diverse regional markets.

 

Excavator Hydraulic Part

FAQ


Q: What exact physical clues confirm that this utility series main pump has developed severe swashplate cradle bearing fatigue?
A: A loud, high-pitched whistling noise during backhoe bucket curling motions, high case drain line oil heating trends, and jerky extension actions under load.
 
Q: What cleanup routine must field service crews complete regarding the hydraulic reservoir before installing this new replacement pump?
A: Technicians must completely purge the primary reservoir tank, vacuum out old metallic filings, change the suction filter element, and pre-fill the pump case with clean oil. 
 
Q: Does part reference 350-0666 serve as a direct functional alternative for remanufactured dealer programs?
A: Yes, this high-grade assembly interchanges natively with part numbers 296-6714 and factory reman tag 20R-4693, providing standard drop-in alignment.
 
Q: How does this piston core maintain flow responsiveness when operating hydraulic attachments in frozen subsoil terrain?
A: Hardened steel elements use optimized tolerance clearances that permit immediate lubrication movement during thick, cold-fluid winter morning startups.
 
Q: What quality options are available?

A: We provide original, OEM, and high-quality aftermarket versions with stable supply capability.

Q:Why Choose RITO?

A:Listed Factory

Stable&Reliable Quality

OEM Factory for Chinese Top Excavator Brands

Supplier to Fortune 500 Companies
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If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.

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If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.

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