K3V112DTP‑9NM9 Hydraulic Pump for Doosan DX260 excavator spare parts

Short Description:

The Kawasaki K3V112DTP‑9NM9 is an original positive‑flow dual‑variable piston main pump, specially developed for Doosan DX260 excavator hydraulic system. It is perfectly matched with the power curve and torque output of Doosan DX260 engine. Based on mature K3‑series large‑displacement pump platform, it converts mechanical rotational energy into high‑pressure stable hydraulic power, and provides dual‑loop oil supply for boom, arm, bucket, travel and slewing actuators. Optimized for heavy‑duty earthwork, rock excavation and continuous high‑intensity construction conditions, this pump features quick response, well‑coordinated compound movements, stable pressure output and low heat generation, ensuring reliable and high‑efficiency operation of Doosan DX260 under various complex site environments.

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Product Detail

Product Tags

description

The K3V112DTP‑9NM9 hydraulic pump adopts positive‑flow control principle. The dedicated 9NM9 valve assembly can real‑time identify operating signals and load variation, actively adjust pump displacement to match main valve flow, reduce useless power loss and improve fuel efficiency and operating smoothness. The pump body adopts high‑strength integral cast steel housing, high‑precision plunger pairs and hardened alloy valve plate, together with upgraded high‑temperature‑resistant high‑pressure sealing components. It has passed strict factory fatigue and impact tests, and can adapt to long‑time heavy‑load, high‑temperature and dusty construction sites. Compared with ordinary replacement pumps without parameter calibration, the 9NM9 version achieves better power matching, faster response and smoother compound movements, effectively avoiding common troubles such as insufficient digging force, sluggish compound action, over‑heating and power waste caused by mismatched parameters.

product parameters

Brand: Kawasaki (Genuine Original)

Model: K3V112DTP‑9NM9

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

Applicable Equipment: Doosan DX260 excavator

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

Core Structure: Exclusive 9NM9 control valve group, positive‑flow signal sensing module, dual‑pump swash‑plate variable mechanism, high‑precision plunger assembly, hardened alloy valve plate, built‑in overload pressure‑limiting valve, multi‑layer reinforced high‑pressure sealing set, integral cast‑steel pump housing

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

Core Function: Dual‑circuit hydraulic power output, positive‑flow intelligent variable adjustment, engine power matching, supplying stable power for full hydraulic actuators to guarantee efficient and coordinated compound actions

Working Characteristics: Fast flow response, precise flow distribution, low power loss, low heat generation, stable pressure‑holding, mild progressive internal leakage, excellent anti‑fatigue performance

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

Matching Parts: Main control valve assembly, travel & slewing hydraulic motor, hydraulic oil tank, return‑oil filter, high‑pressure hydraulic hose, engine flywheel connecting end

advantages

• Equipped with original 9NM9 dedicated control valve group, positive‑flow control realizes active pump‑valve follow‑up, bringing excellent operation sensitivity for Doosan DX260.

• Intelligent flow distribution matches real‑time load demand, reduces power waste under idle and light‑load conditions and improves fuel‑saving performance.

• Dual‑pump independent variable structure guarantees smooth linkage of excavation, lifting, traveling and slewing without jitter or delay.

• Built‑in multi‑stage overload pressure‑limiting mechanism absorbs instantaneous impact pressure and protects internal precision friction pairs against overload damage.

• Hardened internal friction pairs slow down performance attenuation during long‑time heavy‑duty cyclic operation and maintain stable power output.

• Upgraded composite sealing system resists high‑temperature hydraulic‑oil corrosion and aging, lowering risks of external leakage and pressure relief failure.

• Standard original installation dimensions support direct on‑site replacement without modification, lowering maintenance difficulty and shortening equipment downtime.

maintenance & replacement tips

• Regularly inspect the pump body, sealing surfaces and high‑pressure pipeline joints to eliminate oil seepage caused by long‑term vibration and impact loads.

• Replace hydraulic oil and filter elements strictly according to the maintenance cycle to avoid particle impurities scratching precision plunger and valve plate friction pairs.

• Keep hydraulic oil clean to prevent oil deterioration from causing valve‑group sticking and inaccurate positive‑flow signal feedback.

• Check the tightening status of flywheel connecting bolts regularly to avoid abnormal vibration, noise and shaft wear caused by loose installation.

• Avoid long‑term extreme overload operation and frequent impact excavation to prevent premature fatigue damage of internal variable mechanism.

• Replace genuine K3V112DTP‑9NM9 hydraulic pump when sustained pressure drop, weak digging force, serious internal leakage and unsmooth compound actions occur.

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.