斗山
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斗山
Doosan excavators (the brand is now marketed as Develon) drive the cooling fan hydraulically, so fan speed follows both engine coolant temperature and hydraulic oil temperature instead of engine rpm alone. This section covers replacement hydraulic fan motors and fan pumps for Doosan DX-series machines, including DX380, DX420, DX490, DX500, DX520, DX530, DX700 and DX800 applications.
Each unit is supplied as a bolt-on assembly with the mounting flange, shaft and port orientation matched to the original, and is pressure-checked and photographed before dispatch. If the fan runs slowly at idle, will not reverse to clean the radiator cores, or the machine alarms for high coolant temperature, work through our 液压风扇马达诊断指南 before ordering. For other OEM brands, browse the full hydraulic fan motor range.
零件： 400702-00150A heavy-duty hydraulic cooling fan motor for Doosan / Develon DX700 and DX800 class excavators, with cast A and B port markings on the base block.
供货形式： 全新售后市场产品，HTD品牌，中国制造。最小起订量1件，木箱包装，5至8个工作日内发货。.
Order on evidence: the number cast on your housing and a rear photo of the port block. Port identity, not part number, is what decides whether the reverse-clean function still works.
零件： 300506-0007 / 300506-00006B 斗山DX700 LC挖掘机液压冷却风扇马达。圆顶铸造端盖，双安装耳，长螺纹轴端。.
供货形式： 全新售后市场产品，HTD品牌，中国制造。最小起订量1件，木箱包装，5至8个工作日内发货。.
诊断提示： DX700的风扇转速指令为电子控制，因此过热故障可能来自马达、风扇泵或ED调节阀。本页将三者区分说明。.
零件： 400702-00084 hydraulic cooling fan motor for Doosan / Develon DX490 and DX530 excavators, also listed for DX380LC-3 and DX450LC-7M in trade catalogues.
供货形式： new aftermarket unit, HTD brand, square four-bolt flange, splined shaft, rectangular side port block. MOQ 1 piece, wooden case, dispatch in 5 to 8 working days.
Failing early? Oil cleanliness is the variable you control. This page includes the ISO 4406 targets and a decision tree to run before ordering.
应用： cooling fan drive motor for Doosan / Develon DX520 and DX520LC excavators, domed cast housing with twin base ports.
供货形式： 全新售后市场产品，HTD品牌，中国制造。最小起订量1件，木箱包装，5至8个工作日内发货。.
Note on part numbers: DX520 machines in the field carry more than one fan motor variant. This listing is the domed-housing unit, matched from photographs and measurements rather than from a stamped number.
Function: hydraulic fan drive pump on Doosan / Develon DX380, DX420, DX500 and DX520 excavators. This unit is built as a drop-in substitute for the A10VSO18 size 18 variable displacement platform.
供货形式： new aftermarket part, HTD brand, made in China. MOQ 1 piece, wooden case, dispatch in 5 to 8 working days. Bench pressure checked and photographed before packing.
Match before ordering: control variant on the old pump, spline and flange face, port thread sizes, and the position of the solenoid.
零件： K1057295 hydraulic fan motor for the cooling fan drive on Doosan / Develon DX380, DX420, DX500 and DX520 excavators.
供货形式： new aftermarket unit, HTD brand, made in China. Splined shaft, square four-bolt mounting flange and port orientation matched to the original. MOQ 1 piece, wooden case, dispatch in 5 to 8 working days.
Check before ordering: the number cast on your old motor housing and the flange bolt pattern. Trade catalogues overlap this part with 300506-0007 across generations.