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RITO 503806 AJ503806 Needle Roller Bearing K5V200 R340L R380 R450 Excavator Hydraulic Pump Transmission Needle Bearing

Hydraulic pump failures cost wholesalers reputation and cause severe downtime for mining fleets. Weak bearings deform under intense excavation loads, destroying the K5V200 pump transmission. Stop risking profits on sub-par parts that trigger catastrophic mechanical breakdowns.

  • Item NO.:

    503806
  • Order(MOQ):

    1
  • Payment:

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

    JAPAN
  • Lead Time:

    2-3 DAYS
  • Product Details

Upgrade to the RITO 503806 needle bearing. Engineered for R340L, R380, and R450 excavators, this high-load OEM replacement ensures seamless power transmission, slashes maintenance costs, and extends pump lifespan. Secure your fleet's productivity now.

503806 Tapered Roller Bearing

 
Product Specifications

Part Number  503806, AJ503806
Part Name Hydraulic Pump Needle Roller Bearing
Compatible Brand Other
Applicable Models R340L, R380, and R450 excavators
Application Excavator hydraulic system
Material High-Carbon Chromium Steel, Hardened Steel Cage
Product Color Steel Grey
Working Temperature -30°C to 140°C
Key Function Radial load support and friction reduction in main pump shafts
Condition 100% New, Aftermarket / OEM Quality
Packaging Wooden Case/Reinforced Carton/Neutral Packing / Customized Box

 

Key Features & Advantages


Precision

High Radial Capacity

Designed with dense precision needle rollers to maximize load-bearing surface area within compact hydraulic pump spaces.

Leak-Free

Low-Friction Performance

Premium cage design ensures optimal roller guidance and rotation, reducing heat buildup during high-speed transmission.

Direct Fitment

Fatigue-Resistant Steel

Forged from premium high-carbon chromium steel for superior wear resistance under relentless hydraulic pressure cycles.

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 specific failure symptoms indicate that the K5V200 pump needle roller bearing requires immediate replacement?
A: Critical warning signs include unusual metallic clicking noises inside the pump housing, sudden drops in pilot or main hydraulic pressure, high system operating temperatures, and fine brass or steel shrapnel in the suction filter. Immediate replacement prevents broken needle rollers from migrating and destroying the cylinder block and valve plate.
 
Q: What are the critical technical installation requirements for this hydraulic pump needle bearing to prevent premature failure?
A: Universal cleanliness is mandatory; any microscopic dirt particle can jam the needle rollers. Technicians must use specialized press tools that apply force only to the face of the bearing cage, never striking the rollers directly. Submerge the bearing in clean hydraulic oil before assembly to ensure instant lubrication during the initial dry startup.
 
Q: How can procurement managers verify that the AJ503806 bearing correctly fits their excavator fleet?
A: Cross-reference your pump manufacturer nameplate to confirm it is a K5V200 series pump, then check your equipment model numbers for R340L, R380, or R450. Providing your specific pump serial number and the exact dimensional specifications to our sales engineers will guarantee a flawless application match before placing your wholesale order.
 
Q: How does this transmission needle bearing maintain performance under extreme mining or continuous heavy digging conditions?
A: This bearing features a modified crown profile on each needle roller to relieve edge stresses caused by shaft deflection under massive shock loads. The advanced heat-treated alloy steel retains its dimensional stability and hardness even during extended operations in severe environments, preventing cage fracture and structural collapse.
 

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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