300506-00006B Fan Motor For Doosan DX700 excavator

product parameters

Part No：300506-00006B
Type：Fixed Displacement Piston Hydraulic Fan Motor
Applicable Equipment：Doosan DX700 excavator, matched with fan pump 400916-00007
Material：Cast iron housing, alloy steel piston, bronze valve plate, heavy-duty roller bearing
Surface Treatment：Anti-rust coating, ultrasonic deep cavity cleaning, thoroughly remove casting sand, metal scraps and burrs inside flow channel
Control Mode：Flow proportional control, speed varies with hydraulic flow
Feature：Fixed piston structure, compact flange installation, stable torque output, fast response, low internal leakage, good contamination resistance, specially designed fan motor for Doosan DX700 large excavator independent cooling system
Working Temperature：-20℃ ~ +115℃
Package：Independent anti-rust packing + Standard export carton
Storage suggestion：Keep dry, avoid moisture, rust and collision, indoor constant temperature storage, stay away from corrosive gas

• **Stable torque & quick response, low leakage**
Precision ground piston, valve plate and swash plate assembly. Optimized clearance and sealing structure. Stable torque output under back pressure. Rotates steadily with low volumetric leakage, preventing insufficient fan power caused by pressure drop.
• **Heavy-duty cast iron housing, shock & vibration resistant**
Cast iron shell treated by stress relief annealing to eliminate residual internal stress. It can withstand continuous vibration, hydraulic impact and dust corrosion on mining sites. Less shell deformation and slower wear of internal components for longer service life.
• **100% bench tested, high interchangeability**
Each replacement motor passes torque, speed and leakage test on hydraulic test bench. All installation dimensions, port positions and shaft size fully consistent with matching specs. Direct plug-and-play replacement, no modification required, shorten machine downtime and reduce maintenance cost.
• **Reliable cooling protection for engine and hydraulic parts**
Fixed piston structure delivers steady power for cooling fan. It keeps engine and hydraulic components operating within safe temperature range, preventing thermal damage to radiator and engine caused by overheating. It is the premium replacement part for Doosan DX700 overhaul and daily maintenance.

FAQ 

**Q1: Which excavator model is this fan motor suitable for? Is it universal?**
A1: This 300506-00006B fan motor is specially designed for **Doosan DX700 excavator**, applied for independent proportional cooling hydraulic system. It cannot be universally used for other excavator models. Must be matched with fan pump 400916-00007. Wrong model will lead to insufficient fan speed and machine overheating.

**Q2: What factory tests have been done for this motor?**
A2: All 300506-00006B motors are 100% inspected on professional hydraulic test bench, including torque test, speed curve detection, high-low pressure tightness test and internal leakage inspection. Strict screening ensures stable field performance, test reports can be provided upon request.

**Q3: What is the warranty scope and non-warranty scope?**
A3: We provide **12-month warranty**. Warranty covers performance failure when installed correctly, using clean hydraulic oil and running under specified working conditions. Damage caused by hydraulic oil contamination, particle jamming, overpressure impact, wrong installation or man-made damage is not covered by warranty.

**Q4: Does it need professional debugging after installation?**
A4: Standard dimension, direct replacement without modification. After installation, bleed air from cooling hydraulic circuit and check fan rotation direction. If machine is still overheating, check hydraulic oil cleanliness and proportional control signal of fan pump.

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