Doosan
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Doosan
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 hydraulic fan motor diagnosis guide before ordering. For other OEM brands, browse the full hydraulic fan motor range.
Part: 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.
Supplied as: new aftermarket unit, HTD brand, made in China. MOQ 1 piece, wooden case, dispatch in 5 to 8 working days.
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.
Part: 300506-0007 / 300506-00006B hydraulic cooling fan motor for the Doosan DX700 LC excavator. Domed cast cover, twin mounting ears, long threaded shaft end.
Supplied as: new aftermarket unit, HTD brand, made in China. MOQ 1 piece, wooden case, dispatch in 5 to 8 working days.
Diagnostic tip: on the DX700 the fan speed command is electronic, so a heat complaint can come from the motor, the fan pump or the ED regulator valve. This page separates the three.
Part: 400702-00084 hydraulic cooling fan motor for Doosan / Develon DX490 and DX530 excavators, also listed for DX380LC-3 and DX450LC-7M in trade catalogues.
Supplied as: 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.
Application: cooling fan drive motor for Doosan / Develon DX520 and DX520LC excavators, domed cast housing with twin base ports.
Supplied as: new aftermarket unit, HTD brand, made in China. MOQ 1 piece, wooden case, dispatch in 5 to 8 working days.
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.
Supplied as: 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.
Part: K1057295 hydraulic fan motor for the cooling fan drive on Doosan / Develon DX380, DX420, DX500 and DX520 excavators.
Supplied as: 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.