Pressure spikes inside the hydraulic system can reduce machine efficiency and increase the risk of valve block or cylinder damage during continuous operation. The RITO 330-3979 / 3303979 hydraulic relief valve is developed for 416E 420E 422E 432F 450E backhoe loaders to regulate system pressure accurately and maintain balanced hydraulic performance under changing workloads.
Item NO.:
330-3979Order(MOQ):
1Payment:
T/T, WESTERN UNION, CHINESE BANK,PAYPALProduct Origin:
JAPANLead Time：
2-3 DAYSInstalled within the main control system, this relief valve assembly helps protect hydraulic components from overload conditions while supporting smoother machine response during lifting, digging, and loader functions. Reliable pressure control also contributes to reduced system stress and more stable operation across long working hours in construction and utility applications.
| Part Number | 330-3979 |
|---|---|
| Part Name | Relief Valve |
| Compatible Brand | Caterpillar |
| Applicable Models | 416E 420E 422E 432F 450E |
| Application | Excavator |
| Material | Precision Machined Alloy Steel |
| Product Color | Metallic Silver |
| Working Temperature | -35°C to 130°C |
| Key Function | Regulate and release excess hydraulic system pressure |
| Condition | 100% New, Aftermarket / OEM Quality |
| Packaging | Wooden Case/Reinforced Carton/Neutral Packing / Customized Box |
Protects the hydraulic circuit from overload damage during high-pressure working conditions.
Helps stabilize digging and lifting performance by maintaining balanced oil pressure flow.
Suitable for backhoe loaders operating under repetitive hydraulic load cycles.
FAQ
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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