399-2947 hydraulic pump for Caterpillar 301.7D CR mini excavator
If you decide to buy equipment at a low price, make sure that you communicate with the real seller. Find out as much information about the owner of the equipment as possible. One way of cheating is to represent yourself as a real company. In case of suspicion, inform us about this for additional control, through the feedback form.
Before you decide to make a purchase, carefully review several sales offers to understand the average cost of your chosen equipment. If the price of the offer you like is much lower than similar offers, think about it. A significant price difference may indicate hidden defects or an attempt by the seller to commit fraudulent acts.
Do not buy products which price is too different from the average price for similar equipment.
Do not give consent to dubious pledges and prepaid goods. In case of doubt, do not be afraid to clarify details, ask for additional photographs and documents for equipment, check the authenticity of documents, ask questions.
The most common type of fraud. Unfair sellers may request a certain amount of advance payment to “book” your right to purchase equipment. Thus, fraudsters can collect a large amount and disappear, no longer get in touch.
- Transfer of prepayment to the card
- Do not make an advance payment without paperwork confirming the process of transferring money, if during the communication the seller is in doubt.
- Transfer to the “Trustee” account
- Such a request should be alarming, most likely you are communicating with a fraudster.
- Transfer to a company account with a similar name
- Be careful, fraudsters may disguise themselves as well-known companies, making minor changes to the name. Do not transfer funds if the company name is in doubt.
- Substitution of own details in the invoice of a real company
- Before making a transfer, make sure that the specified details are correct, and whether they relate to the specified company.
Seller's contacts
+86 199 246...
Show
+86 199 2461 6345
China
China
China
China
China
China
China
China
China
Mexico, Chihuahua
Romania
Lithuania, Telšiai
Romania
Product Name: Hydraulic Main Pump for Caterpillar (CAT) 301.7D CR Mini Excavator
Compatible Part Numbers: 399-2947 / 399-3051 / 3992947 / 3993051
Applicable Machine: Caterpillar 301.7D CR (Compact Radius) Mini Excavator
1. Product Overview
The 399-2947 and 399-3051 series represent the core power unit of the CAT 301.7D CR hydraulic system. This variable displacement axial piston pump is specifically engineered to provide high-pressure fluid flow for multi-function operations, including digging, tracking, and auxiliary tool use. Its compact, high-density design is tailored for the "Compact Radius" (CR) chassis, ensuring maximum hydraulic efficiency within a limited engine compartment space.
2. Technical Specifications & Parameters
Pump Type: Variable Displacement Axial Piston Pump
Operating Pressure: Rated for high-pressure cycles (up to 240–280 bar) to maximize bucket breakout force.
Flow Characteristics: Load-sensing capability that adjusts flow based on demand, reducing fuel consumption and heat generation.
Housing Material: High-strength, anti-wear alloy casting for superior thermal stability.
Internal Components: Precision-lapped valve plates, hardened piston sets, and heavy-duty bearings for extended service life.
Mounting: Standard SAE-style flange and spline shaft for 100% direct "bolt-on" replacement.
3. Why Partner With a 13-Year Industry Expert?
Technical Authority: We specialize in the specific hydraulic requirements of the CAT mini excavator series, ensuring every pump is calibrated to match original factory performance curves.
Rigorous Testing: Every unit undergoes a comprehensive hydraulic bench test to verify volumetric efficiency, pressure stability, and response times before shipment.
Tiered Quality Solutions: We offer Original New, Premium OEM Replacement, and Certified Remanufactured units to align with your project budget and machine life cycle.
Global Logistics Expertise: All pumps are secured in reinforced, shock-proof export wooden crates. We offer rapid delivery via DHL, FedEx, and UPS, typically arriving in 3 to 7 business days.
4. Critical Installation & Maintenance Protocol
Case Priming (Mandatory): You must fill the pump housing with clean, fresh hydraulic oil through the highest drain port before starting the engine. Running a pump "dry" will cause immediate and irreversible internal damage.
System Decontamination: If the previous pump suffered a mechanical failure, you must flush the hydraulic tank and lines. Residual metallic debris is the primary cause of premature failure in new pumps.
Filter Mandate: Always install a new high-efficiency hydraulic return filter and suction strainer during the pump replacement process.
5. Ordering & Professional Support
Fitment Verification: To ensure 100% accuracy, please provide your machine Serial Number (e.g., Prefix LJ7) or a photo of your existing pump nameplate.
Instant Quote: Contact us today for up-to-date pricing, tiered quality options, and current stock status.
Technical Guidance: Our expert team is available 24/7 to provide guidance on system flushing, initial startup procedures, and hydraulic troubleshooting.