K3V112DTP-HN1F Hydraulic Pump for Doosan DH258 excavator spare parts

Short Description:

The Kawasaki K3V112DTP‑HN1F is an original positive‑flow dual‑piston main pump purpose‑built for Doosan DH258 excavator. With exclusive HN1F internal parameter calibration, it perfectly matches the engine power output and torque characteristics of DH258. Built upon the proven K3‑series variable displacement pump platform, this assembly acts as the core hydraulic power source of the whole machine. It delivers dual‑loop hydraulic output for boom, arm, bucket, travel and slew actuators. Optimized for heavy earth‑moving, mine‑site digging and long‑duration continuous construction, it features sharp response, harmonious multi‑action coordination, stable pressure delivery and low thermal deviation, sustaining consistent working performance under complex site conditions.

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Product Detail

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description

K3V112DTP‑HN1F adopts positive‑flow adaptive adjustment control principle. Its proprietary HN1F valve group captures pilot command signals and real‑time load fluctuations, dynamically adjusts pump displacement and coordinates flow output with main control valve to achieve high‑precision pump‑valve matching. This layout minimizes useless power consumption, improves energy conversion efficiency and optimizes operating hand‑feel. The pump housing adopts high‑stiffness cast steel integral forming, equipped with high‑accuracy plunger assemblies and anti‑wear hardened valve plate, together with upgraded high‑temperature resistant composite sealing components. Each finished pump undergoes durability test, impact test and harsh‑condition simulation test, adapting to construction sites with strong vibration, heavy dust and high ambient temperature. Compared with generic non‑tuned replacement pumps, the HN1F version carries model‑oriented parameter setting, faster dynamic response and smoother combined motions, effectively improving common defects including insufficient digging thrust, sluggish movements, system overheating and energy loss caused by mismatched parameters.

product parameters

Brand: Kawasaki (Genuine Original)

Model: K3V112DTP‑HN1F

Product Name: Positive‑Flow Controlled Dual‑Variable‑Piston Main Hydraulic Pump Assembly

Applicable Equipment: Doosan DH258 excavator

Structural Type: Axial Variable‑Displacement Dual‑Piston Pump (Positive‑Flow Control)

Core Structure: Custom HN1F control valve group, real‑time positive‑flow sensing module, dual‑pump swash‑plate variable mechanism, high‑precision plunger assembly, wear‑resistant alloy valve plate, built‑in overload pressure‑protection valve, multi‑layer composite high‑pressure sealing system, integral rigid cast‑steel pump housing

Main Material: High‑strength cast‑steel housing, wear‑resistant alloy plunger pairs, impact‑resistant thickened valve plate, high‑temperature anti‑aging sealing parts, precision hydraulic control elements

Core Function: Dual‑independent‑loop hydraulic power output, positive‑flow intelligent adaptive regulation, engine‑power matching, supplying balanced power support for full‑range hydraulic actuators to realize harmonious multi‑action operation

Working Characteristics: Sensitive flow dynamic response, precise proportional‑flow distribution, low idle‑state power loss, moderate heat output, stable pressure‑holding performance, small incremental internal leakage, excellent structural anti‑fatigue capability

Working Condition Adaptation: Suitable for heavy‑load excavation, rock fragmentation, frequent start‑stop cycles, impact‑load operation and high‑temperature dusty open‑air construction scenarios

Matching Parts: Main control valve assembly, travel & slew hydraulic motor, hydraulic oil tank, return‑oil filter, high‑pressure hydraulic hoses, engine flywheel connecting interface

advantages

• Equipped with genuine HN1F dedicated control valve group and positive‑flow adaptive adjustment logic, achieving high‑accuracy pump‑valve coordination and optimizing operating experience for Doosan DH258.

• Adaptive flow output adjusts itself according to real‑time load changes, cutting power consumption under idle and light‑load conditions and improving overall fuel‑economy performance.

• Dual‑pump independent variable framework delivers smooth combined motions of digging, lifting, traveling and slewing, free of jitter, delay or motion halt.

• Built‑in multi‑stage pressure buffer structure absorbs instantaneous peak impact pressure, safeguards internal precision components from overload damage and extends pump service life.

• Hardened‑wear‑resistant processing for internal core components slows performance degradation caused by long‑term cyclic heavy‑load work and maintains steady power output.

• Upgraded composite sealing unit features outstanding resistance against high‑temperature hydraulic‑oil corrosion and aging, lowering failure probability of external oil leakage and system pressure relief.

• Adopts OEM‑level standard installation dimensions, supporting direct on‑site non‑destructive replacement without secondary refitting, shortening equipment downtime and lowering maintenance cost.

maintenance & replacement tips

• Conduct regular visual and practical inspection for pump housing, sealing joint surfaces and high‑pressure pipeline connectors to eliminate oil‑leak risks induced by long‑term operational vibration and mechanical impact.

• Replace hydraulic oil and filter elements in accordance with Doosan DH258 official maintenance cycle, prevent solid contaminants from scratching precision friction pairs and guarantee internal hydraulic‑loop cleanliness.

• Keep hydraulic‑oil medium qualified and clean, avoid valve‑group jamming, signal drift and positive‑flow control malfunction caused by oil deterioration and contamination.

• Check tightening torque of flywheel connecting bolts at intervals, prevent abnormal vibration, running noise and shaft‑face wear resulted from insufficient fastening force.

• Avoid long‑time heavy‑duty overload work and frequent impact digging operations, so as to prevent premature fatigue damage of internal variable mechanism.

• When symptoms including sustained pressure drop, insufficient digging thrust, serious internal leakage and unsmooth combined‑movement appear, fit genuine K3V112DTP‑HN1F hydraulic pump timely to restore full hydraulic performance of Doosan DH258.

warehouse

We have built four spare parts warehouses in Xuzhou, Jining, Kunshan and Changsha to provide customers from all over the world with a variety of high-quality spare parts. We can basically ship self-provided spare parts within three days after confirming the order. If the spare parts need to be adjusted or processed, they will be shipped within 7-30 days.