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RITO 331-19919 Pump Coupling Assembly JS330 JS300 JS360 33119919 Hydraulic Pump Drive Coupling Excavator Driving Component

Experiencing severe structural clattering inside your engine bell housing or noticing rapid input shaft seal degradation on your heavy excavator? Hardened elastomer elements that split or compress out of round allow angular engine alignment errors to damage your pump input shaft, ending in catastrophic flywheel ring gear failures. Swap out worn coupling disks with the high-torsion RITO 331-19919 pump coupling assembly immediately.

  • Item NO.:

    331-19919
  • Order(MOQ):

    1
  • Payment:

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

    JAPAN
  • Lead Time:

    2-3 DAYS
  • Product Details

Heavy machinery engineering shops cannot risk continuous driveline vibration that shears off expensive main pump drive splines. Our rugged RITO 331-19919 driving component utilizes highly resilient polymer compounds bonded to a forged steel core to absorb extreme engine torsional shock pulses. Order this complete coupling assembly today to secure smooth, vibration-free fluid power transitions.

331-19919 Pump Coupling

 
Product Specifications

Part Number  331-19919
Part Name Hydraulic Pump Drive Coupling
Compatible Brand JCB
Applicable Models JS330, JS300, JS360 Excavators
Application Excavator hydraulic system
Material High Tensile Nodular Cast Iron and Hardened Alloy Steel
Product Color Industrial Black Core with Polished Steel Hub Face
Working Temperature -30°C to 110°C
Key Function Transferring engine rotational mechanical force smoothly to rotate the hydraulic pump input shaft
Condition 100% New, Aftermarket / OEM Quality
Packaging Wooden Case/Reinforced Carton/Neutral Packing / Customized Box

 

Key Features & Advantages


Precision

High-Resilience Flexible Elements

Advanced elastomer formulation cushions continuous flywheel rotational vibration to shield pump bearings.

Leak-Free

Splined Forged Steel Hub

Deep-induction hardened internal splines provide a permanent, tight grip onto the main input shaft.

Direct Fitment

Extreme Torsional Absorption

Prevents engine torque pulses from creating destructive harmonic frequencies inside the pump casing.

Rigorous Testing

Global Supply Tiering

We offer Original, OEM, and high-performance Aftermarket options to provide flexible procurement strategies for diverse regional markets.

 

Excavator Hydraulic Part

FAQ


Q: What mechanical warning flags indicate that a 331-19919 drive coupling has suffered internal tearing or rubber separation?
A: Rhythmic rattling noises coming from the engine-pump intersection area at idle, heavy rubber dust accumulating inside the flywheel housing inspection port, and increased oil seal weeping.
 
Q: What alignment verification must workshop maintenance crews complete when bolting this coupling onto the engine flywheel?
A: Technicians must use a dial indicator to check engine-to-pump radial and axial alignment specifications, ensuring the main shaft inserts straight without creating side-loading forces.
 
Q: Is this 331-19919 coupling model code shipped as a complete kit including the bolt hardware and splined inserts?
A: This part code specifies the complete core coupling element assembly with its pressed metal hub center, matching factory specifications for direct re-attachment.
 
Q: How does this engine drive coupling prevent mechanical failure when the excavator works with high-vibration rock breakers?
A: The flexible polymer core features specialized material density that acts as a dampener, absorbing sudden torque feedback from heavy attachments before it can fracture the engine crankshaft.
 
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.

Leave A Message

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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