Products

320D 323DL C6.4 Hydraulic Pump Flexible Coupling 279-7871 7Y-0463 305-4951 305-4952 305-4950 2797871 7Y0463 3054951 3054950

Engine vibration quickly destroys low-grade hydraulic pump couplings, shearing splines and disconnecting engine power completely. For heavy equipment fleets, a sudden coupling rupture instantly paralyzes the excavator, disrupting entire work schedules and racking up immense repair costs.

  • Item NO.:

    7Y-0463
  • Order(MOQ):

    1
  • Payment:

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

    JAPAN
  • Lead Time:

    2-3 DAYS
  • Product Details
Restore smooth, reliable power transmission with this heavy-duty flexible coupling. Directly cross-referenced with 279-7871, 7Y-0463, and 305-4951, it is custom-built for C6.4 engines on 320D and 323DL excavators to damp vibration and protect your main hydraulic pump.

7Y-0463 Coupling Assembly

 
Product Specifications

Part Number  279-7871 / 7Y-0463 / 305-4951 / 305-4952 / 305-4950
Part Name Excavator Hydraulic Pump Main Flywheel Flexible Coupling Assy
Compatible Brand Caterpillar
Applicable Models 320D, 323DL
Application Excavator hydraulic system
Material High-Density Natural Rubber with Forged Steel Hub Inserts
Product Color Black and Silver
Working Temperature -30 to 100 Degrees Celsius
Key Function Transmitting flywheel power to the hydraulic pump while isolating rotational vibrations
Condition 100% New, Aftermarket / OEM Quality
Packaging Wooden Case/Reinforced Carton/Neutral Packing / Customized Box

 

Key Features & Advantages


Precision

Superior Shock Absorption

Premium elastomeric material dampens engine torsional vibrations to protect pump shafts.

Leak-Free

High Torque Capacity

Engineered to handle the intense fluid power demands of heavy excavation cycles.

Direct Fitment

Spline Wear Resistance

Hardened metal inserts prevent premature stripping and maintain tight engine engagement.

Rigorous Testing

Multi-OEM Cross Fit

Replaces 305-4952, 305-4950, and 2797871 flawlessly for versatile fleet service.
 

 

Excavator Hydraulic Part

FAQ


Q: What warning signs indicate a flexible hydraulic coupling is failing inside the flywheel housing?
A: Severe high-frequency vibrations under load, unusual clunking noises during engine startup, and black rubber dust accumulation inside the pump housing inspection plate indicate advanced coupling degradation.
 
Q: What are the strict alignment technical requirements when installing a new flexible coupling?
A: Perfect parallel and angular alignment between the engine flywheel face and the hydraulic pump shaft input must be verified using a dial indicator to prevent uneven rubber wear.
 
Q: How can procurement officers confirm this coupling fits their specific machinery inventory?
A: This coupling matches C6.4 engine setups perfectly. Cross-verify your part number with 279-7871, 7Y-0463, 305-4951, 305-4952, or 305-4950 for 320D series units.
 
Q: Does the elastomeric body maintain its elasticity in harsh, oil-heavy environments?
A: Yes. The specialized composite rubber formula is engineered to withstand oil mist exposure and continuous operating temperatures up to 100 degrees Celsius without hardening or tearing.
 
Q: What supply chain benefits do you offer to commercial industrial parts stockists?
A: We maintain large production runs to ensure competitive pricing and immediate stock availability, allowing you to fulfill urgent excavator repair orders without delay.
 

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
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.

Related Products

320CLZBYG Stick cylinder
RITO Excavator Stick Cylinder 320CLZBYG ZX120 ZX200 ZX210 EX200-1 Hydraulic Boom Cylinder Arm Cylinder for Construction Machinery

RITO Excavator Stick Cylinder is built for ZX120, ZX200, ZX210, EX200-1, and 320CLZBYG. For distributors and agents: high interchangeability reduces inventory complexity. Mining customers benefit from reinforced sealing and shock resistance, lowering downtime and maintenance costs.    

View More
527-0741 527-0742 Hydraulic Main Pump
RITO Hydraulic Pump Coupling Hub 527-0741 527-0742 for Caterpillar CAT 336GC 336D 15 Teeth Flange Coupling Group

This RITO 527-0741 527-0742 Hydraulic Pump Coupling Hub is a key transmission component for Caterpillar CAT 336GC and 336D excavators, designed to connect the engine and hydraulic pump with stable torque transfer. Featuring a 15-tooth flange structure, it ensures precise alignment, smooth power delivery, and reliable operation in demanding construction environments.

View More
124-1607 Hydraulic Oil Cooler
RITO Hydraulic Oil Cooler 124-1607-OT CAT 320C 320D 325D 330D Excavator Oil Cooler Core Radiator Assembly for Caterpillar

This RITO 124-1607-OT Hydraulic Oil Cooler is a key cooling component for Caterpillar CAT 320C, 320D, 325D, and 330D excavators, designed to effectively dissipate heat from hydraulic oil and maintain optimal system temperature. It ensures stable oil viscosity, protects internal components, and supports reliable operation in demanding construction environments.

View More
234-4440
RITO Excavator Swivel Joint 234-4440 CAT 336D 325D 330D Travel Motor Lines Hydraulic Rotary Union for Caterpillar

This RITO 234-4440 Swivel Joint (Rotary Union) is a critical hydraulic component for Caterpillar CAT 336D, 325D, and 330D excavators, designed to transfer hydraulic oil between the upper structure and undercarriage during continuous rotation. It ensures stable oil flow to travel motors, maintaining smooth operation and reliable performance in construction environments.

View More
585-9230 Solenoid Valve
RITO Original Solenoid Valve 585-9230 Excavator Hydraulic Solenoid Valve Proportional Valve for CAT

Hydraulic lag and erratic pressure in CAT excavators often signal a failing proportional valve, causing costly site delays. The 585-9230 eliminates these inefficiencies. Precision-engineered for mining and heavy construction, it prevents system overheating and jerky boom movements.

View More
585-9230 Solenoid Valve
RITO Original Solenoid Valve 585-9230 Excavator Hydraulic Solenoid Valve Proportional Valve for CAT

Hydraulic lag and erratic pressure in CAT excavators often signal a failing proportional valve, causing costly site delays. The 585-9230 eliminates these inefficiencies. Precision-engineered for mining and heavy construction, it prevents system overheating and jerky boom movements.

View More
179-6916 Spring
RITO Excavator spring Coil Spring 179-6916 spring for CAT

The RITO Excavator Coil Spring 179-6916-Y is designed for heavy-duty applications in CAT excavators, offering reliable and long-lasting performance in demanding work environments. This high-quality spring ensures consistent and efficient load-bearing capability, reducing wear and tear on critical excavator components. The 179-6916-Y is essential for maintaining optimal machine performance in industries such as construction and mining. By minimizing downtime and maintenance costs, this coil spring enhances productivity and contributes to the long-term durability of your fleet. Designed for seamless compatibility with various CAT excavator models, it provides an ideal replacement solution for wholesale distributors and agents.

View More
291-0061 Fan Piston Pump
RITO Hydraulic Axial Piston Pump 291-0061 Hydraulic Fan Piston Pump for Excavator Main Pump Assembly

Unstable fan speeds and hydraulic overheating often stem from inefficient pump pressure. In grueling mining sites, a failing fan pump leads to engine derating and massive downtime. The 291-0061 solves these thermal inconsistencies, preventing the costly "cascading failures" that plague heavy excavator fleets.

View More
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.

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.

Home

Products

whatsApp

contact