Hyundai R290-7 kaivuri Kawasaki K5V140DTP 31N8-10080 hydraulipumppu

R290‑7 Hydraulic Pump for Hyundai Excavator spare parts 31N8‑10080 K5V140DTP Axial Piston pump

Product Overview

The Hyundai R290‑7 has spent years as a dependable workhorse on infrastructure sites and rental fleets across the world, and the K5V140DTP pump assembly — referenced by part number 31N8‑10080 — is what keeps its digging, lifting and travel performance consistent. This variable displacement axial piston pump sits at the centre of the hydraulic circuit, converting engine power into the high‑pressure flow that drives every cylinder and motor on the machine. On a 29‑ton class unit running long shifts, pump wear shows up gradually: cycle times stretch, the boom lifts slower, travel loses its bite on grades, the hydraulic oil temperature climbs, and a rising mechanical note from the pump area confirms that internal leakage is taking over. Once those symptoms appear, continuing to run the machine risks scoring the cylinder block and valve plate — damage that spreads to valves and motors. This aftermarket pump is built to the original K5V140DTP geometry and control settings, so the worn unit can be exchanged directly, restoring the R290‑7 to its rated performance and protecting the rest of the hydraulic system.

Core Advantages

1. A tandem pump that restores balanced hydraulic performance
The K5V140DTP runs both pump sections in one housing, so replacing the complete assembly renews flow to the implement and travel circuits at the same time. That balance is what brings back the machine's original digging feel and travel speed together, rather than fixing one circuit at the expense of the other.

2. Hardened running surfaces that resist contamination wear
Piston shoes, cylinder block and valve plate are hardened and ground to hold their seal against fine particles that inevitably enter the oil over years of service. The result is lower internal leakage, cooler oil and maintained output as the hours add up.

3. Regulator settings tuned to the R290‑7 power curve
The pump's control is set to the original pressure‑flow relationship, so it works with the engine and hydraulic system as Hyundai designed them. Operators notice smooth, predictable response — strong breakout power and fine metering for controlled work.

4. Drop‑in installation that keeps downtime predictable
The flange, spline, ports and regulator interfaces match the original unit, so the exchange follows the standard service procedure. No adapters, no pipe changes, no custom work — the machine is tested and back on site quickly.

5. A practical supply choice for fleets and repair networks
As an aftermarket replacement, this pump delivers dependable field performance at a substantially lower cost than a dealer exchange. It suits workshops maintaining a number of R290‑7 machines, with sample and batch supply both available.

Manufacturing & Quality Control

Production is traceable from incoming material verification through machining, heat treatment and assembly. Every completed pump runs on a hydraulic bench for pressure, flow and noise testing before packing, and units that fail any check are removed at source. The finished assembly is rust‑protected, sealed and packed in export‑grade shock‑cushioned cases for sea and overland freight. Test reports can accompany batch orders for fleet maintenance records.

Frequently Asked Questions

Q1: How do I confirm this pump matches my R290‑7?
A: Compare the part number on your existing pump (31N8‑10080) and share your machine serial number. Production batches can vary, so this check avoids a mismatch before dispatch.

Q2: Can I keep my existing regulator and fittings?
A: The pump matches the original regulator interface, so existing controls and fittings can be reused if they are in good condition. Damaged regulator parts are available separately if needed.

Q3: What service steps protect the new pump?
A: Renew the hydraulic oil and filters, flush contamination from the circuit, bleed the system after installation, and run a no‑load warm‑up before returning to full digging duty.

Q4: What is covered under warranty?
A: Manufacturing and material defects are covered. Damage from contaminated oil, wrong oil grade, foreign objects in the circuit, overload operation or incorrect installation is excluded; please follow the Hyundai service manual for commissioning.