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RITO Hydraulic Pump Cylinder Block 311701 A8VO107 CAT E320B Excavator Main Pump Rotating Group for Caterpillar

Wholesalers, maintenance contractors and mine fleet owners are often troubled by degraded cylinder blocks that cause main pump pressure drop, slow digging response and costly site shutdowns. Our 311701 A8VO107 hydraulic pump cylinder block is customized for CAT E320B excavator main pump rotating group. Adopting premium forged alloy structure, it solves core procurement troubles like bore abrasion, pressure bearing failure and short service life, perfectly fit for high-intensity mining and all-day infrastructure construction.

  • Item NO.:

    311701
  • Order(MOQ):

    1
  • Payment:

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

    JAPAN
  • Lead Time:

    2-3 DAYS
  • Product Details

311701 Cylinder Block

 
Product Specifications

Part Number  311701
Part Name Cylinder Block
Compatible Brand Tongmyung
Applicable Models CAT E320B, A8VO107
Application Excavator
Material High strength wear-resistant alloy steel
Product Color Industrial alloy dark gray
Working Temperature -28℃ to 86℃
Key Function Serve as core rotating component, distribute hydraulic flow and cooperate with piston reciprocating movement
Condition 100% New, Aftermarket / OEM Quality
Packaging Wooden Case/Reinforced Carton/Neutral Packing / Customized Box

 

Key Features & Advantages


Precision

High Roundness Bore Machining

Precision internal honing keeps bore roundness stable under sustained hydraulic pressure, preventing internal oil leakage.
Leak-Free

Forged Structural Toughness

One-piece alloy forging removes internal defects, effectively resisting crack and distortion under frequent impact load.

Direct Fitment

Smooth Hydraulic Circulation

Optimized internal passage layout streamlines oil flow, lowers pump heat generation and boosts overall working efficiency.
 
Rigorous Testing

Heat-Treated Wear Resistance

Professional thermal treatment enhances surface hardness, slowing down component wear and extending pump service intervals.

 

Excavator Hydraulic Part

FAQ


Q: What results in excessive main pump heat and gradual loss of excavator working power?
A: Worn and deformed cylinder block bore disrupts hydraulic distribution; replacing with 311701 A8VO107 restores original pump performance.
 
QWhat essential steps should be followed when fitting this cylinder block?
A: Thoroughly clear metal debris inside the pump cavity, keep horizontal alignment during installation and avoid forced pressing.
 
QHow to verify this part fits your excavator perfectly?
A: Match part number 311701 and A8VO107 specification, dedicated for CAT E320B main pump rotating group assembly.
 
Q: Can it maintain stable function in dusty mines and dramatic temperature changes?
A: It works steadily from -28℃ to 86℃, owning great structural stability and wear resistance for harsh outdoor working sites.
 
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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