Products

RITO 856259 Cylinder Block Valve Plate Assembly E330L E330 856259 Hydraulic Pump Rotor Group Excavator Pump Repair Kit

Severe cycle lag and heavy engine bogging on your E330L signal rotor block clearance breakdown. Scored mating faces let high-pressure fluid bypass internal lines, causing extreme heat and stalling output.

  • Item NO.:

    856259
  • Order(MOQ):

    1
  • Payment:

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

    JAPAN
  • Lead Time:

    2-3 DAYS
  • Product Details

Rebuild your hydraulic core with this complete E330L cylinder block valve plate assembly. Part 856259 delivers a factory-grade seal to restore massive breakout force across mining operations.

856259 Cylinder Assembly

 
Product Specifications

Part Number  856259
Part Name Hydraulic Pump Rotor Group Cylinder Block Valve Plate Assembly Kit
Compatible Brand Tongmyung
Applicable Models E330L, E330 Large Tracked Excavators
Application Excavator hydraulic system
Material High‑strength Alloy Steel
Product Color Matte Steel Grey
Working Temperature -25°C to 110°C
Key Function Main Rotary Pressure Containment and Port Fluid Distribution Management
Condition 100% New, Aftermarket / OEM Quality
Packaging Wooden Case/Reinforced Carton/Neutral Packing / Customized Box

 

Key Features & Advantages


Precision

Matched-Lap Valve Interface

Delivers a zero-tolerance hydraulic boundary layer to eliminate internal oil drift across long shifts.

Leak-Free

Reinforced Piston Bore Walls

Withstand intense internal pressure expansion stresses to prevent barrel distortion during hard digging.

Direct Fitment

Hardened Tool Steel Base

Resists micro-abrasive erosion from particle debris suspended within contaminated oil systems.

Rigorous Testing

 Multi-Tier Quality Options

We provide Original, OEM, and Premium Aftermarket grades, allowing distributors to meet diverse client budgets and performance needs.

 

Excavator Hydraulic Part

FAQ


Q: What structural failure signs show that an E330 hydraulic pump valve plate has sustained heavy bypass wear?
A: The presence of deep radial discoloration tracks between the inlet and outlet ports, alongside extreme casing heat.
 
Q: Can this 856259 kit be used to overhaul both the front and rear pumps on a tandem hydraulic drive layout?
A: Yes, but ensure you verify the rotation direction requirement as valve plates are directional for left/right sides.
 
Q: What specific preventative maintenance extends the operating lifespan of this internal rebuild group?
A: Implement a strict 500-hour oil analysis program and replace suction elements to catch abrasive debris early.
 
Q: How does the structural alloy layout handle sudden thermal shock loads when starting on freezing winter mornings?
A: The matched thermal expansion rates of the block and plate prevent localized clearance binding before the oil warms.
 
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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Leave A Message
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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