Imagine your excavator standing at the edge of a deep trench. When you pull the joystick, you shouldn't just feel a mechanical movement; you should feel a surge of fluid energy. Our K3V112DT Hydraulic Pump is designed to provide that exact sensation. In the field, a failing pump sounds like a strained whine—a metallic protest against the workload. Replacing it with our assembly brings back the smooth, powerful "hiss" of pressurized oil flowing through a perfectly balanced system.
As the operator, you will notice the difference in the tips of your fingers. The controls become crisp, and the "hunting" for pressure disappears. The scent of clean, cool hydraulic oil staying within its temperature range—thanks to the pump’s efficient internal friction management—tells you the machine is healthy. This isn't just a replacement part; it’s a restoration of the machine’s soul. Whether you are lifting heavy stone or grading fine soil, this pump ensures that the R220-9S moves as an extension of the operator’s intent, silent, strong, and incredibly precise.
Technical Specifications
The following parameters are preserved to ensure full compatibility with original Kawasaki and Hyundai technical standards.
| Applicable Industries | Building Material Shops, Machinery Repair Shops, Construction works , Energy & Mining, Other |
| Showroom Location | None |
| Video outgoing-inspection | Provided |
| Machinery Test Report | Provided |
| Marketing Type | Ordinary Product |
| Place of Origin | Shaanxi, China |
| Warranty | 3 months |
| Condition | New |
| Product name | Hydraulic pump assembly |
| Application | Excavator |
| Part No | K3V112-HN0V |
| Quality | High-Quality |
| Usage | Daewoo |
Key Features and Performance Highlights
This K3V112DT assembly is defined by its ability to convert engine torque into hydraulic work with minimal energy loss.
Swash Plate Precision: The heart of the pump features a mirror-polished swash plate. This reduces the "stick-slip" effect, allowing for ultra-smooth tilting angles and consistent flow even when the system is under maximum load.
Heat Dissipation Engineering: Internal oil pathways are aerodynamically optimized to reduce turbulence. Lower turbulence means less heat generation, which protects your hydraulic seals and extends the life of your entire hydraulic circuit.
Anti-Cavitation Design: Our pistons and cylinder blocks are manufactured with specialized port geometries that prevent the formation of destructive air bubbles (cavitation), the leading cause of premature pump failure in high-speed applications.
Vibration Dampening: The high-strength cast iron casing is designed with structural ribs that absorb harmonic vibrations, resulting in a quieter cabin environment and reduced stress on the pump’s mounting bolts.
Structural Excellence and Material Science
We don't just assemble pumps; we engineer them for the realities of heavy earthmoving. Every internal component is a masterpiece of material science.
Forged Alloy Pistons: Each piston is crafted from high-carbon alloy steel, subjected to cryogenic treatment to ensure a surface hardness that resists the abrasive nature of contaminated hydraulic fluid.
Bimetal Valve Plates: Our valve plates utilize a sophisticated bronze-on-steel sintering process. This provides the perfect balance of self-lubrication (from the bronze) and structural rigidity (from the steel), preventing the plate from warping under high-pressure "spikes."
Reinforced Drive Shaft: The spline of the drive shaft is induction-hardened to prevent stripping under the high-torque start-ups common in cold weather or heavy-load digging.
Precision Nine-Hole Cylinder Block: The cylinder block is machined to micron-level tolerances, ensuring that each of the nine pistons moves with identical friction profiles, eliminating the "pulsing" feel often found in lower-quality aftermarket pumps.
Hydraulic Efficiency and System Synergy
A pump is only as good as its regulator. Our K3V112DT kit focuses on the synergy between the pump and the excavator’s main control valve.
Dynamic Flow Control: The included regulator is pre-calibrated to respond to the R220-9S's negative flow control system. This ensures that when the joysticks are in neutral, the pump sits at minimum displacement, saving you thousands of dollars in fuel costs over the machine’s life.
Synchronized Tandem Performance: As a dual-pump (DT) configuration, our units are perfectly synchronized. This prevents one track from moving faster than the other, ensuring your excavator tracks in a perfectly straight line—a critical factor for safety on narrow job sites.
Low-Speed Volumetric Efficiency: Many pumps lose power when the engine RPM drops. Our precision internal clearances ensure that even at low idle, you maintain enough hydraulic "bite" to perform delicate lifting tasks without the machine stalling or stuttering.
Why Choose Us?
Partnering with us means securing your project timeline. We provide the technical certainty that only a specialist in hydraulic systems can offer.
Proven Field Reliability: Our K3V series pumps are currently powering thousands of machines across mining, road construction, and demolition sites globally. We have real-world data proving their longevity in extreme climates.
Zero-Defect Testing Protocol: Every single pump undergoes a full-load bench test before shipping. We measure flow, pressure, and leakage at various temperatures to ensure the unit you receive is ready to work from the moment it’s bolted on.
Technical Documentation Support: We provide more than just the hardware. Our clients receive access to installation guides and pressure-setting protocols to ensure the regulator is perfectly tuned to your specific machine's age and condition.
Transparent Sourcing: Every component within our pump kit is traceable to high-tier manufacturers, ensuring you are not getting "mystery" metal that will fail after a few hundred hours of work.
FAQ: Professional Maintenance & Installation
Does the pump come pre-filled with oil?
No. For shipping safety and to prevent contamination, the pump is drained. However, it is coated with a rust-inhibitive internal film. It is critical to fill the pump case with clean hydraulic oil through the highest drain port before starting the engine to prevent dry-start damage.
Will this pump fix my excavator's "slow under heat" problem?
Yes, usually. "Slow under heat" is often caused by internal leakage in the pump as the oil thins. Our new K3V112DT maintains tight volumetric tolerances, ensuring that pressure stays high even as the hydraulic oil reaches its operating temperature.
Is the regulator included and pre-set?
Yes, the regulator assembly is included. While it is pre-set to standard factory specifications for the R220-9S, we recommend a final pressure check and minor adjustment once the pump is installed to account for wear in your machine's main control valve.
Can you provide a cross-reference for other machine brands?
Certainly. While this specific listing is for the R220-9S, the K3V112DT is a versatile pump used in many 21-25 ton excavators. Please provide your machine’s serial number, and we can confirm the exact spline and mounting configuration for you.
What is the warranty coverage for this assembly?
We provide a comprehensive warranty against manufacturing defects. To maintain the warranty, we require that the hydraulic oil and filters be replaced at the time of installation to ensure the new pump isn't contaminated by debris from the previous failure.
