K1006254A hydraulic fan motor For Doosan DX420, DX480, DX520 excavator

product parameters

Part No：K1006254A
Type：Fixed Displacement Piston Hydraulic Fan Motor
Applicable Equipment：Doosan DX420, DX480, DX520 Excavator; EC780B (modified replacement)
Material：Ductile iron housing, alloy steel piston & rotor assembly, tin-bronze bearing, FKM fluorine rubber sealing rings
Surface Treatment：Black oxidation anti-rust treatment, ultrasonic internal cavity cleaning, thoroughly remove casting sand, metal scraps and burrs inside flow channel
Control Method：Hydraulic drive, rotation speed changes with inlet hydraulic flow
Rated Working Pressure：25 MPa
Max Instantaneous Peak Pressure：32 MPa
Feature：Heavy-duty piston motor structure, large torque output, stable rotation, low internal leakage, strong anti-pollution ability, direct OEM replacement, suitable for large mining excavator cooling system
Working Temperature：-25℃ ~ +120℃
Rated Rotation Speed：1400 rpm, Max allowable speed:1950 rpm
Package：Independent anti-rust vacuum packing + Standard export carton
Storage suggestion：Keep dry, avoid moisture, rust and collision, indoor constant temperature storage, stay away from corrosive gas

• **Heavy-duty K1006254A piston fan motor tailor-made for Doosan DX series, compatible with EC780B large excavator cooling retrofit**
K1006254A hydraulic fan motor is custom designed for Doosan DX420/DX480/DX520 excavators. It cooperates seamlessly with matched fan pump. Large stable output torque drives big-size cooling fan rotation, efficiently dissipating heat during continuous rock excavation and heavy-load mining work and preventing engine overheating under long-hour continuous operation.
• **Precision ground piston & rotor assembly, stable torque output and strong anti-shock performance**
Alloy steel piston and rotor assembly adopts high-precision grinding process and optimized fit clearance. It delivers steady torque under variable heavy load conditions. Low volumetric leakage reduces power loss and improves overall cooling system efficiency of large excavator.
• **Robust thickened ductile iron housing with stress relief treatment, excellent impact and vibration resistance**
Ductile iron housing after stress relief annealing eliminates internal residual stress. It can cope with frequent heavy vibration and high pressure impact on mining sites. The housing is not easy to deform, slowing down wear of internal piston and bearing components and extending service life.
• **Large torque hydraulic output to protect engine and radiator against thermal overload damage**
This K1006254A fixed displacement fan motor provides powerful rotary power for large cooling fan. It maintains engine cooling system operating within optimal temperature range, preventing radiator and engine thermal fatigue damage caused by sustained high temperature, ideal replacement for overhaul and retrofit of large mining excavators.

FAQ 

Q1: Can K1006254A fan motor be directly fitted on EC780B without modification?
A1: K1006254A original OEM application is Doosan DX420/DX480/DX520. For EC780B, mounting bracket and hydraulic pipeline need minor modification. Please confirm installation space before ordering.

Q2: What will cause the fan to vibrate violently after installing K1006254A?
A2: The main reasons include unbalanced large fan blade, misalignment between motor shaft and fan hub, loose mounting bolts or internal bearing damage. Stop operation immediately for inspection.

Q3: What is the matched fan pump model for K1006254A fan motor?
A3: It matches Doosan original fan pump for DX series excavator. Flow and pressure parameters must be matched; mismatched pump will lead to insufficient fan speed or motor overload damage.

Q4: What maintenance requirements for K1006254A in mining working condition?
A4: Replace hydraulic oil and filter element on schedule, keep hydraulic oil cleanliness at NAS 7 or better. Check shaft seal leakage and fan blade balance every 1500 working hours.

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