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RITO Excavator Pilot Pump 4276918 Hydraulic Gear Pump EX120-5 ZX200 EX120-3 HPV102 Pilot Pump Assembly for Hitachi Parts

Weak pilot pressure leads to sluggish excavator control and costly operational delays. In grueling mining sites, low-quality gear pumps often fail under high-pressure cycles, causing unexpected downtime that eats into your fleet's profitability and disrupts critical project schedules.

  • Item NO.:

    4276918
  • Order(MOQ):

    1
  • Payment:

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

    JAPAN
  • Lead Time:

    2-3 DAYS
  • Product Details

Our premium 4276918 pilot pump assembly restores precision control for HPV102 systems. Engineered for EX120-5 and ZX200 models, this high-performance gear pump ensures stable hydraulic output and OEM-level reliability, reducing maintenance overhead for wholesalers and fleet managers.

4276918 Pilot Pump

 
Product Specifications

Part Number  4276918
Part Name Excavator Pilot Pump Gear Pump
Compatible Brand Hitachi
Applicable Models EX120-5 ZX200 EX120-3
Application Excavator hydraulic system
Material High-Strength Alloy Steel
Product Color Iron Gray
Working Temperature -25 to 110 degrees Celsius
Key Function Provide pilot oil pressure for main control valve activation
Condition 100% New, Aftermarket / OEM Quality
Packaging Wooden Case/Reinforced Carton/Neutral Packing / Customized Box

 

Key Features & Advantages


Precision

OEM Precision Casting

Manufactured to exact 4276918 specifications, ensuring a seamless fit and immediate restoration of pilot hydraulic pressure

Leak-Free

Enhanced Wear Resistance

Features high-strength alloy gears that resist cavitation and friction, significantly extending service life in sandy or dusty environments.

Direct Fitment

High-Pressure Stability

Optimized for HPV102 series pumps, providing consistent 4-5MPa pilot pressure even during simultaneous multi-function operations.

Rigorous Testing

Rapid System Response

Reduces joystick latency and improves excavator maneuverability, directly boosting on-site work efficiency and operator safety.

 

Excavator Hydraulic Part

FAQ


Q: What are the primary symptoms of a failing 4276918 pilot pump?
A: Common indicators include heavy or unresponsive joysticks, delayed hydraulic functions, and difficulty releasing the hydraulic safety lock. If your EX120-5 feels sluggish despite high engine RPM, the pilot gear pump is likely worn and losing internal pressure.
 
Q: Are there specific technical requirements during the installation of this assembly?
A: Yes, you must prime the pump with clean hydraulic oil before startup to prevent dry-running damage. Additionally, check the pilot line filter for metal debris; failure to flush the system can lead to premature wear on the new 4276918 gears.
 
Q: How do I confirm this pilot pump fits my specific HPV102 hydraulic system?
A: This pump is designed for the HPV102 series used in Hitachi EX120-3, EX120-5, and ZX200 models. Please verify the mounting flange and the number of splines on the drive shaft against your original 4276918 unit to ensure 100% compatibility.
 
Q: How does this pump perform in extreme high-temperature mining environments?
A: Engineered with a working temperature range of -25 to 110 degrees Celsius, this pump utilizes high-temperature resistant oil seals. This ensures the 4276918 maintains volumetric efficiency and prevents internal leakage even during continuous, heavy-load shifts in tropical climates.

 

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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