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RITO Pump Rotating Group 321702 Front Cylinder Block Valve Plate PC300-7 PC350-7 PC300-8 321702 Excavator Hydraulic Part

Experiencing heavy vibrations or weak hydraulic response from the front circuit of your excavator's main pump? Scored piston chambers and scratched valve surfaces allow massive internal oil slippage, hurting attachment performance and overloading your return lines with extra heat. Rebuild your front pump system using the high-precision RITO 321702 rotating group.

  • Item NO.:

    321702
  • Order(MOQ):

    1
  • Payment:

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

    JAPAN
  • Lead Time:

    2-3 DAYS
  • Product Details

Quarry parts distributors require high-quality internal pump components that hold up under continuous, high-pressure tracking and digging cycles. Our RITO 321702 front cylinder kit delivers excellent wear resistance and reliable volumetric efficiency. Keep this high-demand service kit in stock to satisfy urgent workshop repair requests instantly.

321702 Cylinder Block&Valve Plate RIGHT

 
Product Specifications

Part Number  321702
Part Name Front Cylinder Block Valve Plate Excavator Hydraulic Part
Compatible Brand Tongmyung
Applicable Models PC300-7, PC350-7, PC300-8 Excavators
Application Excavator hydraulic system
Material High‑strength Alloy Steel
Product Color Polished Steel Silver
Working Temperature -25°C to 120°C
Key Function Generating front-circuit fluid displacement within the main axial pump housing
Condition 100% New, Aftermarket / OEM Quality
Packaging Wooden Case/Reinforced Carton/Neutral Packing / Customized Box

 

Key Features & Advantages


Precision

Bimetallic Block Cast Technology

High-density copper alloy layer provides a durable, low-friction interface against the valve plate.

Leak-Free

Precision Finished Valve Plate

Micro-polished flow channels ensure clean, unobstructed oil distribution to the main valves.

Direct Fitment

Accurate Drive Shaft Splines

Precision internal splines ensure a tight, balanced connection with the main input shaft.

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: Fault Diagnosis: How can a technician tell if a front pump problem stems from the 321702 rotating group or an external valve?
A: Connect pressure gauges to both the front and rear pump diagnostic ports; if only the front circuit drops pressure under load while its casing line runs hot, the internal rotating group is worn and leaking.
 
Q: Installation Standards: What preparation is required before placing this front cylinder block into the pump housing?
A: Technicians must thoroughly coat the internal bores and face plate with clean hydraulic fluid. Ensure that the splined drive shaft aligns perfectly without force, and verify that the piston shoes slide freely inside each barrel chamber.
 
Q: Procurement Verification: Are the individual internal components of the 321702 front kit interchangeable with the 321701 rear kit?
A: The cylinder blocks and pistons are identical, but the front valve plate uses a different indexing slot layout than the rear plate. Ordering the complete 321702 kit ensures you get the correct configuration for the front pump side.
 
Q: Extreme Environment Performance: How does this front rotating group maintain reliable operation during heavy concrete breaking shifts?
A: The alloy steel cylinder body is heat-treated to resist high-frequency shock fatigue. This treatment prevents the cylinder walls from expanding or micro-cracking under the intense pressure spikes common during heavy demolition work.
 
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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