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RITO 191-6933 1916933 Hydraulic Pump Coupling Assy 302.5C 303 304 305 307 Rubber Flexible Flywheel Drive Coupler Spare Parts

Severe engine-to-pump vibrations quickly wear out input shafts and crack delicate internal hydraulic components. Procurement managers face constant supply chain stress when cheap, brittle engine couplings shear under sudden load surges, trapping compact fleets in costly workshop cycles. Prevent catastrophic misalignment and terminal pump damage with the high-dampening 191-6933 element.

  • Item NO.:

    191-6933
  • Order(MOQ):

    1
  • Payment:

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

    JAPAN
  • Lead Time:

    2-3 DAYS
  • Product Details
Normalize torque transmission and isolate harsh engine harmonics using the premium 191-6933 hydraulic pump coupling assy. Custom-molded for 302.5C, 303, 304, 305, and 307 mini excavators, this flexible flywheel drive coupler absorbs extreme shock loads, guarantees perfect shaft synchronization, and secures peak field uptime.

191-6933 Pump Coupling

 
Product Specifications

Part Number  191-6933 / 1916933
Part Name Hydraulic Pump Coupling Assy
Compatible Brand Caterpillar
Applicable Models 302.5C, 303, 304, 305, 307 Mini Excavators
Application Excavator hydraulic system
Material High-Tensile Aluminum Hub + Premium Elastic Rubber Element
Product Color Black Compound with Metallic Silver Center
Working Temperature -35 to 110 Degrees Celsius
Key Function Engine-to-Hydraulic Pump Flexible Power Transmission and Vibration Dampening
Condition 100% New, Aftermarket / OEM Quality
Packaging Wooden Case/Reinforced Carton/Neutral Packing / Customized Box

 

Key Features & Advantages


Precision

High-Elasticity Torsional Shock Isolation

Absorbs destructive engine crankshaft vibrations to shield the hydraulic main pump shaft from premature fatigue.

Leak-Free

Heavy-Duty Reinforced Polymer Core

Engineered with premium wear-resistant rubber compounds that resist tearing and aging under continuous high-RPM workloads.

Direct Fitment

Flawless Flywheel Spline Synchronization

Machined to strict micro-tolerances for an exact fit into the engine flywheel housing, eliminating rotational play.

Rigorous Testing

Thermal and Oil Degradation Resistance

Withstands prolonged exposure to hot engine compartments, stray hydraulic fluids, and airborne site contaminants.
 

 

Excavator Hydraulic Part

FAQ


Q: What are the primary fault symptoms indicating this hydraulic pump coupling assembly needs immediate replacement?
A: Common indicators include unusual knocking or rattling sounds between the engine and main pump, increased chassis vibration, visible rubber dust accumulation inside the bell housing, and sudden hydraulic power loss while the engine is running.
 
Q: What are the critical technical installation requirements to ensure maximum service life?
A: Technicians must verify perfect axial and radial alignment between the engine flywheel and the hydraulic pump shaft. Clean all splines thoroughly, apply a light coat of anti-seize lubricant, and torque all mounting bolts evenly to OEM specifications.
 
Q: How can procurement managers verify exact fitment and compatibility before ordering?
A: Please cross-reference part number 191-6933 with your machine parts manual. Providing our team with your excavator serial number prefix, along with the engine model name or the number of splines on the inner hub, ensures a 100% correct match.
 
Q: How does this flexible flywheel drive coupler perform under extreme mining environment conditions?
A: The high-resilience rubber element undergoes advanced curing to prevent hardening or cracking during severe temperature fluctuations. It maintains its structural elasticity and full torque load capacity across a working range of -35 to 110 Degrees Celsius.
 

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 Companie
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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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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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