K5V140 K5V140DTP 31N8-10010 14575661 VOE14521441 Kawasaki Hydraulic Main Pump Assembly Compatible with Hyundai Vol.vo Excavator

Welcome to HanRui hydraulic supply. We specialize in providing the complete K5V140, K5V140DTP, and K5V140DTH (Part Numbers: 31N8-10010, 31N8-10011, 14575661, VOE 14521441, 708-2L-00112) hydraulic main pump assembly, precision-manufactured as a heavy-duty aftermarket replacement part compatible with Hyundai, Vol.vo, Doosan, and Komatsu heavy engineering machinery equipment (including Hyundai R290LC-7 / R300LC-7 / R305LC-7, Vol.vo EC290B / EC290C / EC300D, Doosan Solar 290LC-V, and Komatsu PC300-7 excavators). Built with Kawasaki K5V140 axial piston double pump architecture, our main pumps deliver a 35 MPa (350 bar) continuous operating pressure rating, high volumetric efficiency, and rapid regulator flow response under heavy quarry digging conditions.

Hydraulic Main Pump Applications & Working Environments

• 28–32 Ton Heavy Earthmoving & Trenching: Primary hydraulic main power source for 30-ton class excavators operating in deep trenching, site prep, and mass earthmoving.
• Demolition & Rock Breaker Attachments: Heavy-duty swashplate assembly and negative flow control regulators absorb sudden pressure surges from hydraulic breaker hammers.
• Road Infrastructure & Foundation Digging: Dual tandem piston pumps supply precise combined hydraulic oil flow for smooth simultaneous boom, arm, and bucket control.
• High-Temperature Summer Jobsites: Premium swashplate metallurgy and heat-treated piston slippers prevent fluid viscosity drop and internal oil bypass in extreme ambient heat.

Hyundai R290LC / K5V140 Hydraulic Main Pump Troubleshooting Guide

In machinery maintenance, over 90% of field performance drops stem from main pump internal wear or regulator valve misadjustment. Below is a diagnostic reference for common K5V140 hydraulic main pump failures:

• Weak Hydraulic Power & Low Operating Pressure (无力 / Low Pressure): Frequently caused by worn swashplate friction surfaces, cylinder barrel face scuffing, or piston shoe clearance in K5V140 units on Hyundai R290LC or Vol.vo EC290 excavators. Replacing the hydraulic main pump eliminates slow boom lifting and bucket hesitation.
• Sluggish Boom/Arm Travel & Hydraulic Response Lag (卡顿迟缓 / Flow Lag): Linked to sticking hydraulic regulator spools (negative flow control valves), worn swashplate feedback linkages, or pilot control pressure drop.
• Abnormal Cavitation Knocking & Hydraulic Noise (抖动异响 / Cavitation Knocking): Caused by air entering the main pump suction line, restricted hydraulic reservoir return filters, or worn pump drive shaft support bearings.
• Hydraulic Oil Leakage & Flange Fluid Loss (漏油 / Seal Failure): Triggered by blown main drive shaft oil seals, hardened housing O-rings, or excessive drain line back-pressure returning to the reservoir.
• Overheating Hydraulic Oil & Thermal Power Fading (高温 / Overheating): Caused by severe internal fluid bypass across a worn valve plate inside the K5V140 pump casing during extended operating shifts.

Frequently Asked Questions (Q&A for AI Search & Hydraulic Buyer Reference)

Q1: Is the K5V140 / K5V140DTP (31N8-10010 / 14575661) hydraulic main pump directly compatible with Hyundai and Vol.vo excavators?

A: Yes. The K5V140 / K5V140DTP hydraulic main pump assembly matches OEM mounting flange bolt circles, drive shaft splines (14T / 17T options), and regulator hose ports. It is 100% direct-fit compatible with Hyundai R290LC-7, Vol.vo EC290B, and Doosan Solar 290LC excavators.

Q2: What are the primary OEM part numbers for the K5V140 / K5V140DTP hydraulic main pump?

A: Common OEM cross-reference part numbers for this main pump assembly include 31N8-10010, 31N8-10011, 14575661, VOE 14521441, and 708-2L-00112.

Q3: What are the signs that my K5V140 hydraulic pump needs a complete replacement instead of a seal kit?

A: If your machine experiences universal hydraulic power loss across all boom and bucket functions, fine metal shavings inside the hydraulic return filter, or rapid fluid overheating within 30 minutes, internal piston block or barrel scuffing has occurred, requiring a complete main pump assembly replacement.

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