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RITO 321708 Hydraulic Pump Drive Shaft PC300-7 PC350-7 PC360-7 HPV140 321708 Excavator Main Pump Shaft Piston Pump Shaft Part

Excessive main shaft play or twisted spline configurations throw the entire piston rotating group out of alignment, causing internal valve friction and costly pump housing crackdowns. Safeguard your pressure core with the RITO 321708 hydraulic pump drive shaft.

  • Item NO.:

    321708
  • Order(MOQ):

    1
  • Payment:

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

    JAPAN
  • Lead Time:

    2-3 DAYS
  • Product Details

Our rugged RITO 321708 main input shaft provides straight structural rotation to optimize volumetric oil flow rates and lower bearing heat generation. Add this core component to your inventory to ensure long-lasting main pump overhauls.

321708 Drive Shaft

 
Product Specifications

Part Number  321708
Part Name Excavator Main Pump Shaft Piston Pump Shaft Part
Compatible Brand Tongmyung
Applicable Models PC300-7, PC350-7, PC360-7 Excavators
Application Excavator hydraulic system
Material High‑strength Alloy Steel
Product Color Polished Steel Silver
Working Temperature -35°C to 115°C
Key Function Transferring engine flywheel mechanical force to rotate the internal piston barrels
Condition 100% New, Aftermarket / OEM Quality
Packaging Wooden Case/Reinforced Carton/Neutral Packing / Customized Box

 

Key Features & Advantages


Precision

Precision Ground Bearing Journals

Mirror-polished bearing interfaces reduce friction heat to protect sensitive high-speed shaft seals.

Leak-Free

High-Tensile Spline Milling

Tough input splines resist torsional distortion during rapid hydraulic system pressure build-ups.

Direct Fitment

Balanced Core Concentricity

Precision-machined line balance prevents destructive harmonic vibrations from destroying adjacent cylinder components.

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: What specific pump failure modes tell a mechanic that the main 321708 input shaft has failed?
A: Immediate indicators include rapid leakage of hydraulic fluid into the engine flywheel housing, structural whining noises under low engine RPM, or a complete lack of system pressure if the splines strip out.
 
Q: Installation Standards: What assembly precautions prevent premature wear on this high-pressure piston pump shaft?
A: Mechanics must inspect and replace the shaft's supporting tapered bearings during reassembly, and coat the main lip oil seals with clean grease to prevent dry friction wear during the initial engine startup.
 
Q: Procurement Verification: How do buyers tell the mechanical difference between part numbers 321708 and 321709 within the HPV140 housing?
A: The 321708 code specifies the specialized primary drive shaft layout, which features different overall length and gear-drive dimensions than the secondary 321709 model, guaranteeing a correct fit for dual-pump setups.
 
Q: Extreme Environment Performance: How does this drive shaft handle sudden peak system pressures during heavy continuous rock breaking?
A: The shaft core is forged from specialized high-tensile alloy steel and deep through-hardened. This metallurgical design allows the component to handle massive torsional twisting forces without developing structural deformation.
 
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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