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RITO 3860875 Excavator Relief Valve 386-0875 Hydraulic Cylinder Pressure Valve 320D 320DL 330D Hydraulic Relief Valve for Excavator Parts

Hydraulic cylinder response inconsistency is often traced back to micro-instability in pressure balancing components rather than full system failure. 386-0875 valve unit is used in CAT 320D, 320DL, and 330D hydraulic circuits to manage transient pressure behavior during rapid actuator transitions.

  • Item NO.:

    386-0875
  • Order(MOQ):

    1
  • Payment:

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

    JAPAN
  • Lead Time:

    2-3 DAYS
  • Product Details

Instead of simply limiting pressure, this component functions as a dynamic hydraulic “buffer node”, smoothing abrupt pressure waveform fluctuations created during boom lifting, arm retraction, and bucket impact phases in high-load excavation cycles.

386-0875 Relief Valve

 
Product Specifications

Part Number  386-0875
Part Name Relief Valve
Compatible Brand Caterpillar
Applicable Models CAT 320D / 320DL / 330D
Application Excavator
Material Heat-Resistant Alloy Core Body
Product Color Metallic Grey
Working Temperature -40°C to 125°C
Key Function Hydraulic pressure transient stabilization during motion switching
Condition 100% New, Aftermarket / OEM Quality
Packaging Wooden Case/Reinforced Carton/Neutral Packing / Customized Box

 

Key Features & Advantages


Precision

Hydraulic Pulse Stabilization Interface

Reduces sharp pressure wave spikes generated during sudden actuator direction changes.

Leak-Free

Transient Load Response Moderation

Helps the system absorb short-duration hydraulic shocks during excavation impact events.

Direct Fitment

Internal Flow Rebalancing Architecture

Assists in redistributing irregular pressure peaks inside cylinder circuit pathways.

Rigorous Testing

High-Frequency Duty Cycle Adaptation

Maintains consistent behavior under repetitive boom-arm-bucket coordinated operations.

 

Excavator Hydraulic Part

FAQ


Q: What type of hydraulic issue is this component targeting?
A: It addresses unstable pressure behavior during movement transitions rather than constant pressure failure.
 
QHow does it differ from standard relief valves?
A: Instead of opening only at peak pressure, it moderates short-duration hydraulic fluctuations during operation.
 
QWhat symptoms suggest replacement need?
A: Jerky actuator motion, inconsistent force output, or hydraulic “lag” during directional changes.
 
Q: Can it improve operator control feel?
A: Yes, smoother pressure transitions result in more predictable joystick response.
 
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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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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