Kawasaki K3V180DTP Hydraulic Pump for Hyundai R340/R340L: Specifications, Features & Buying Guide (2026)

Quick Answer

Key Takeaways

• The K3V180DTP is a tandem (twin-body) pump — both sections must be matched and tested together, not rebuilt as a single unit.
• It is designed for the Hyundai R340 / R340L; the reference part number is 31N9-10050 and the assembly weighs 180 kg.
• Twin-plunger, high-pressure output and strong power response make it suitable for continuous heavy-load digging.
• A precision valve plate + wear-resistant plunger assembly is what separates a 5,000-hour pump from an 8,000-hour pump.
• The original interface allows direct replacement of the OEM pump body — no adapter, no re-plumbing.
• Always confirm the control variant (load-sensing / negative control) against the plate on your old pump before ordering.

Table of Contents

• 1. Introduction
• 2. K3V180DTP Key Specifications
• 3. How the K3V180DTP Tandem Pump Works
• 4. K3V180DTP: Quality Tiers Compared
• 5. K3V180DTP Key Features
• 6. Common Problems & Symptoms
• 7. Maintenance & Service Tips
• 8. Buying Guide: Order the Right Pump
• 9. Export & Quality Assurance
• 10. FAQ
• 11. Get a K3V180DTP Quote Today

1. Introduction

The main hydraulic pump is the heart of a 34-ton excavator. On the Hyundai R340 and R340L, that heart is the Kawasaki K3V180DTP — a tandem axial piston pump that feeds both the travel and the working circuits from a single, compact body. When it fails, the machine stops, and every day of downtime is a day of lost production.

This guide covers everything a fleet owner, dealer or repair shop needs to know about the K3V180DTP: its specifications, how it works, how to recognise the signs of wear, how to maintain it, and how to source the right replacement. If you are looking at Kawasaki hydraulic pumps or Hyundai excavator parts for the R340 class, this is the reference you need.

2. K3V180DTP Key Specifications

Note: control variant, port configuration and regulator settings can differ between machine builds. Always confirm against the plate on your original pump before ordering.

3. How the K3V180DTP Tandem Pump Works

A tandem pump carries two pump sections on one shaft. On the K3V180DTP, the twin-plunger (piston) structure lets each section deliver variable flow independently, so the machine can split power between travel and work functions without a second pump housing.

Inside each section, pistons slide against a cylinder barrel and a valve plate spins against the end cover — mating surfaces machined to clearances measured in microns. Hydraulic oil does three jobs here: it transmits power, lubricates those precision surfaces, and carries away heat. When the oil is clean and cool, the pump runs for thousands of hours. When it is contaminated or overheated, those same surfaces wear rapidly. The precision valve plate and wear-resistant plunger assembly are the two components that decide how long the K3V180DTP lasts.

4. K3V180DTP: Quality Tiers Compared

Not every "K3V180DTP" on the market is the same product. The price difference between listings usually reflects three very different quality tiers:

For a production machine, a verified complete assembly is almost always the lowest total-cost option — even when its price tag is higher than a rebuild quote.

5. K3V180DTP Key Features

• Twin-plunger tandem structure — stable high-pressure output and strong power response under heavy loads.
• Precision valve plate — accurate flow control and less internal leakage, protecting system efficiency.
• Wear-resistant plunger assembly — longer service life and effectively reduced excavator repair downtime.
• Original interface specifications — direct replacement of the original pump body, easy installation and high overall hydraulic matching.
• Matched as one assembly — both tandem sections are built and tested together for balanced output.

6. Common Problems & Symptoms

Most K3V180DTP failures announce themselves before the pump stops working. Watch for these symptoms:

If you find bright metal particles in the filter, shut the machine down and inspect immediately — circulating debris can destroy control valve assemblies and motors downstream.

7. Maintenance & Service Tips

• Change hydraulic oil every 1,500–2,000 hours (tighter, 1,000–1,500 h, for dusty or high-temperature mining duty).
• Replace the return filter every 500 hours and the suction strainer every 500–1,000 hours.
• Keep oil temperature below 80°C. Clean the oil-cooler fins every 500 hours.
• Never reuse filters — a cleaned element has unpredictable flow and can collapse.
• When replacing the pump, flush the system first and change both the return filter and suction strainer — old debris damages a new pump.

8. Buying Guide: Order the Right Pump

To get an accurate quote and the correct part the first time, send a supplier four things in one message:

• 1. Machine model and serial number (e.g., Hyundai R340L).
• 2. The part number from your pump plate (reference: 31N9-10050).
• 3. The control variant — load-sensing or negative control, as marked on the original unit.
• 4. Shipping requirement — sea or air, port of destination, and required lead time.

With those four details, a good supplier can confirm stock, price and lead time within hours. Without them, every quote you receive will be an approximation.

9. Export & Quality Assurance

RITO HYDRAULIC supplies complete, individually tested main pump assemblies, swing motors, travel motors and control valves for Caterpillar, Komatsu, Hitachi, Hyundai, Kobelco, Doosan and Kawasaki / Rexroth-series machines. Every K3V180DTP assembly is:

• Bench-tested before shipment — flow, pressure and leakage checked as one tandem unit.
• Supplied with a per-unit test report on request.
• Packed for export — crate, rust protection and moisture barrier for sea freight.
• Covered by a 6–12 month warranty.

You can browse the full parts range at excavator hydraulic parts, and learn more about RITO HYDRAULIC.

10. FAQ

Q1: What excavator does the K3V180DTP fit?

The K3V180DTP is fitted to the Hyundai R340 and R340L (30–40 ton class). Always cross-check your machine's serial number and pump plate, because control variants can differ between builds.

Q2: What is the part number and weight of the K3V180DTP?

The reference part number is 31N9-10050 and the assembly has a net weight of approximately 180 kg.

Q3: Is the K3V180DTP a single or tandem pump?

It is a tandem pump — two pump sections on one shaft, sharing a single housing. Both sections should be matched and tested together rather than rebuilt independently.

Q4: Can I install it as a direct replacement?

Yes. The K3V180DTP uses the original interface specifications, so it can directly replace the original pump body. Confirm the control variant and port configuration first.

Q5: How do I know my K3V180DTP is failing?

Typical signs are slow cycle times, weak digging, rising oil temperature, pump whine or knock, and metal particles in the return filter. Metal debris is the most urgent signal — stop and inspect before it circulates.

Q6: Rebuild or replace — which is better?

For a production machine, a verified complete assembly is usually the lower total-cost option once hidden-wear risk, downtime and warranty are counted. Rebuild only when the housing and shaft are confirmed sound.

Q7: How long does installation take?

With a complete, ready-to-install assembly and a trained mechanic, the physical swap normally takes several hours. Total downtime is usually dominated by parts sourcing and shipping rather than the installation itself.

Q8: How often should I change the hydraulic oil?

Every 1,500–2,000 hours for standard duty, tightened to 1,000–1,500 hours in dusty or high-temperature conditions. Replace the return filter every 500 hours.

Q9: What oil should I use?

Use a dedicated hydraulic oil meeting the OEM specification — typically ISO VG 46 in temperate climates and ISO VG 68 in hot climates. Never substitute engine oil.

Q10: How can I be sure the pump is good before it ships?

Ask for the per-unit test report. A verified supplier bench-tests each tandem assembly for flow, pressure and leakage and provides the data before shipment.

11. Get a K3V180DTP Quote Today

Send us your machine model, serial number and the part number from your pump plate, and our team will confirm stock, provide a test-report sample and quote lead time the same day. RITO HYDRAULIC ships complete K3V180DTP assemblies and other excavator hydraulic parts worldwide, with export packing and a 6–12 month warranty.

Contact our team for a same-day quotation.