KYB PSVL-42CG-9 266-6943 hydraulic pump for Caterpillar 303.5C CR 303.5D mini excavator
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KYB PSVL-42CG-9 Hydraulic Main Pump for CAT 303.5C CR 303.5D | Part No. 266-6943 284-8038
1. Product Overview
The KYB PSVL-42CG-9 is a high-performance, variable displacement axial piston pump designed to handle the rigorous duty cycles of 3.5-ton mini excavators. As the primary hydraulic power unit for the CAT 303.5 series, it delivers the precise flow and high-pressure output required for smooth multi-functioning of the boom, bucket, and travel motors. Its compact, integrated design is optimized for "Compact Radius" (CR) machines, providing maximum power density in tight engine compartments.
2. Technical Specifications & Parameters
Manufacturer & Model: KYB (Kayaba) PSVL-42CG-9
Caterpillar Part Numbers: 266-6943, 284-8038, 2666943, 2848038
Machine Compatibility: Caterpillar (CAT) 303.5C CR, 303.5D
Pump Type: Variable Displacement Axial Piston Pump
Control System: Load-sensing capability to maximize fuel efficiency and prevent engine overloading.
Operating Pressure: Rated for high-pressure operation (approx. 24.5–28 MPa) for peak breakout force.
Mounting: OEM-standard flange and input shaft spline for 100% direct "bolt-on" replacement.
3. Why Partner With a 13-Year Industry Expert?
Technical Precision: We specialize in the KYB PSVL series and understand the specific regulator settings required for CAT hydraulic systems. Our pumps restore the original responsiveness and speed to your machine.
Rigorous Bench Testing: Every unit undergoes a comprehensive hydraulic test to verify volumetric efficiency, flow curves, and pressure stability before it is cleared for shipment.
Direct Factory Value: Benefit from our 13-year optimized supply chain, which allows us to offer high-quality OEM and Premium replacement options at competitive wholesale prices.
Global Logistics Expertise: Pumps are secured in reinforced, shock-proof export wooden crates. We offer rapid delivery via DHL, FedEx, or 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 the pump "dry" will cause immediate and irreversible internal damage to the pistons and bearings.
System Decontamination: If the previous pump suffered a mechanical failure (metal-to-metal contact), you must flush the entire hydraulic tank, lines, and oil cooler. Residual metallic debris is the #1 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 to maintain oil cleanliness.
5. Ordering & Professional Support
Fitment Verification: To ensure 100% accuracy, please provide your machine Serial Number (e.g., Prefix DMY or RBR) or a photo of your existing pump nameplate.
Instant Quote: Contact us today for up-to-date pricing, tiered quality options (Original New vs. Premium OEM), and current stock availability.
Technical Guidance: Our expert team is available 24/7 to provide professional guidance on installation, system flushing, and hydraulic troubleshooting.