MMF-044D hydraulic fan motor For construction machinery

product parameters

Part No：MMF-044D
Type：Fixed Displacement Axial Piston Hydraulic Fan Motor
Applicable Equipment：Wheel loaders, large excavators, mining equipment
Control Mode：Fixed displacement, speed controlled by inlet flow
Material：High-strength cast iron housing, alloy steel piston & cylinder block, copper alloy valve plate, roller bearing, FKM fluorine rubber sealing rings
Surface Treatment：Precision machining, surface hardening, anti-corrosion coating
Drive Method：Hydraulic oil drive
Rated Rotation Speed：2100 rpm, Max allowable speed:2700 rpm
Package：Independent anti-rust packing + Standard export wooden case
Storage suggestion：Keep dry, avoid moisture, rust and collision, indoor constant temperature storage, stay away from corrosive gas

・MMF-044D fixed displacement axial piston hydraulic fan motor, OEM replacement, perfectly matched with supporting fan pump for heavy machinery cooling system
MMF-044D hydraulic fan motor is built for heavy-duty mining and construction cooling circuit. It converts hydraulic pressure into rotary torque to drive cooling fan. Stable constant torque output ensures fan can maintain stable rotation under continuous heavy loading operation, preventing engine overheating.
・High-rigidity cast iron housing with stress relief treatment, excellent anti-vibration and pressure impact resistance
Cast iron housing after stress relief annealing eliminates internal residual stress. It can resist continuous vibration and cyclic pressure impact on quarry and mining sites. The housing is not easy to deform, slowing down wear of internal piston, valve plate and bearing components and extending service life.
・Heavy-duty rugged design, stable performance under long continuous operation to protect radiator and engine assembly
This fan motor adopts rugged heavy-duty structure, reliable performance during long continuous operation. It provides stable rotary power for cooling fan. It maintains cooling hydraulic system operating normally, preventing radiator overheating caused by insufficient fan torque under heavy load, ideal replacement for overhaul and daily maintenance of heavy construction machinery.

FAQ 

Q1: What machine types can MMF-044D fan motor fit?
A1: It is widely used on heavy wheel loaders and large excavators. Confirm spline shaft size and port layout before ordering.

Q2: What is the difference between fixed displacement MMF-044D and variable fan motors?
A2: MMF-044D is fixed displacement. Its torque is stable; fan speed is controlled by flow from fan pump instead of motor itself.

Q3: What causes abnormal noise when MMF-044D runs?
A3: Common reasons include air trapped in hydraulic circuit, contaminated oil or worn valve plate and piston assembly inside the motor.

Q4: What is the key point during installation of fixed displacement fan motor?
A4: Align spline shaft correctly, avoid forced assembly. Bleed air fully after installation to prevent cavitation damage.

Q5: How to maintain MMF-044D in mining environment?
A5: Monitor oil cleanliness strictly. Check shaft seal regularly. Replace hydraulic oil and filter on shorter cycle for mining working condition.

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