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.:
386-0875Order(MOQ):
1Payment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANLead Time:
2-3 DAYSInstead 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.

| 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 |

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

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

Assists in redistributing irregular pressure peaks inside cylinder circuit pathways.


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