Product Overview

This is a premium-quality Main Pump Solenoid Valve, part number 139-3990, engineered as a direct replacement for Caterpillar E320B engines. Designed for durability and precise hydraulic control, this component is essential for maintaining optimal performance in demanding industrial and construction applications. We specialize in global B2B supply, serving major markets across North America, Europe, the Middle East, and Asia-Pacific with reliable logistics and export compliance.

Key Features & Benefits

• OEM-Spec Quality: Manufactured to original equipment specifications, ensuring perfect fit and seamless integration with your Caterpillar E320B hydraulic system.
• Enhanced Durability: Built with high-grade materials to withstand high pressure, temperature fluctuations, and the rigorous demands of construction and industrial environments.
• Precise Flow Control: Delivers accurate and responsive hydraulic fluid control for consistent machine operation and improved efficiency.
• Rigorously Tested: Each unit undergoes comprehensive testing, including a video outgoing-inspection, to guarantee performance and reliability before shipment.
• Global Logistics Support: Packaged securely for international shipping and backed by professional after-sales online support for your peace of mind.

Technical Specifications

OEM Cross-Reference

This part is a direct replacement for the following OEM number:

• Caterpillar: 139-3990

Please consult your machinery manual or contact our technical support to confirm compatibility with your specific system configuration.

Compatibility

This Main Pump Solenoid Valve is designed specifically for use with the following equipment:

• Primary Application: Caterpillar E320B Excavator / Heavy Equipment.
• Industry Application: Ideal for machinery in Construction, Industrial Manufacturing, Agriculture, Power Generation (Gensets), Marine, and Material Handling sectors.

Global Supply & Distribution

As an experienced exporter, we ensure seamless delivery to key industrial regions worldwide. Our supply chain is optimized for fast and reliable shipping to major ports and logistics hubs in:

• North America: USA, Canada, Mexico
• Europe: UK, Germany, Netherlands, Poland
• Asia-Pacific: Australia, Singapore, Japan, South Korea
• Middle East & Africa: UAE, Saudi Arabia, South Africa
• South America: Brazil, Chile

We handle all export documentation and compliance, ensuring a smooth customs clearance process for our B2B clients.

Quality Assurance

Our commitment to quality is integral to our manufacturing process.

• Manufacturing Standards: Produced in ISO-certified facilities using precision engineering and quality-controlled materials.
• Comprehensive Testing: Every valve is subject to a detailed machinery test report and a video outgoing-inspection is provided, verifying operational integrity.
• Warranty & Support: Backed by a solid 6-month warranty and supported by dedicated online technical assistance for troubleshooting and installation guidance.

FAQ

Q: How can I confirm this solenoid valve will fit my specific Caterpillar E320B machine?
A: We recommend verifying the existing part number on your current solenoid valve. This unit replaces OEM number 139-3990. For further confirmation, you can provide your machine’s serial number to our support team for a precise compatibility check.

Q: What documentation is provided with the shipment?
A> Each order includes a commercial invoice, packing list, and certificate of origin. Upon request, we can also provide the machinery test report for the specific batch. The video outgoing-inspection is available for review prior to shipment.

Q: What after-sales support do you offer for this part?
A> We provide comprehensive online support for the duration of the warranty and beyond. This includes technical guidance for installation, troubleshooting assistance, and support with sourcing related components. Our team is committed to ensuring your operational continuity.

Our advantages

1.An authorized wholesaler of Isuzu genuine parts, Hino genuine parts, Mitsubishi genuine parts and Mahle parts.

2. We are not only supply genuine parts, but also high quality OEM parts, which are made in China or made in Japan.

3. More than 10 years of experience in machinery parts, professional supply of diesel engine parts.

4. Fast delivery, the fastest can be shipped in one day ,more than 500,000 of different types parts in stock.

5. Scientific ERP system, easy and fast to locate the parts that customer needs.

6. Professional technician checks the parts before delivery, to make sure the parts are correct, usable and defect-free.

Exhibition

Packing&Shipping

1.  Our shipment is by air/sea/express (DHL/FEDEX/TNT/UPS/EMS).

2.  Once we get confirmation of payment, we will ship products in 2 days.

3.  Our packaging is standard export wooden box or others as your requirement.

4. We’ll check and test the products before shipping , and givethe pictures to our customers to confirm.

FAQ

Q1. What is your company major products?

A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.

Q2.What is the MOQ?

A: Normally we can supply any quantity if we have in stock.

Q3. What is your payment term ?

A: We accept Western Union, T/T, Paypal.

Q4. What is the packing ?

A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.

Q5. When can you deliver products after payment ?

A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .

Q6. What can you do to complete order perfectly ?

A: In the beginning , We will communicate with clients in details to understand what they need .

Before packing , We will check the products and send photos to clients .After confirmation ,

We will packing products well to avoid damage . Once we get tracking number ,

We will send it to customer and keep contact in with clients .