398-7480 fan motor For CAT 420F loader

product parameters

Part No：398-7480
Type：Gear Type Hydraulic Fan Motor
Displacement：24 cc/rev
Applicable Equipment：CAT 420F Backhoe Loader
Control Mode：Hydraulic pressure proportional control
Material：High-strength cast iron housing, alloy steel gear pair, roller bearing, FKM fluorine rubber sealing rings
Surface Treatment：Precision machining, surface hardening, anti-corrosion coating
Drive Method：Hydraulic oil drive
Nominal Working Pressure：22 MPa
Max Instantaneous Peak Pressure：28 MPa
Feature：OEM replacement fan motor, compact structure, low starting torque loss, stable rotation, direct drop-in fit, matched with supporting fan pump for cooling system
Working Temperature：-25℃ ~ +110℃
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

・398-7480 gear hydraulic fan motor, OEM replacement, perfectly matched with supporting fan pump for CAT420F backhoe loader cooling system
398-7480 hydraulic fan motor is custom fitted for CAT420F backhoe loader cooling circuit. It converts hydraulic pressure into rotary torque to drive cooling fan. Stable torque output ensures fan can adjust speed flexibly under continuous earthmoving and 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 construction sites. The housing is not easy to deform, slowing down wear of internal gear and bearing components and extending service life.
・Optimized internal flow channel structure and upgraded FKM sealing assembly, good anti-cavitation & medium temperature resistance
Optimized internal flow path reduces oil turbulence and cavitation risk. FKM seal set delivers outstanding medium-temperature and hydraulic oil aging resistance. It effectively prevents internal and external oil leakage, avoiding premature component wear caused by oil contamination, minimizing unexpected machine downtime.
・Full hydraulic bench inspection before delivery, high interchangeability for direct plug-and-play replacement
Each 398-7480 fan motor passes torque, speed, starting performance and durability hydraulic bench test. All mounting dimensions, port positions and shaft fully match OEM specifications. Direct installation without modification, shortening equipment downtime and cutting maintenance cost.

FAQ 

Q1: What are the main application scenarios of 398-7480 fan motor?
A1: It is designed for CAT420F backhoe loader, widely used in road repair, farm earthmoving, construction site loading and excavation working conditions.

Q2: Can this 398-7480 fan motor fit other CAT backhoe loader models?
A2: It is mainly suitable for CAT420F. Please check part number and installation dimension before trying to install on 416F/428F to avoid mismatch.

Q3: What will cause gear abrasion inside this fan motor?
A3: Long-term use of contaminated hydraulic oil, excessive system pressure or oil starvation will lead to gear surface scratch and accelerated wear.

Q4: What should we do if fan rotates slowly after motor replacement?
A4: Check system supply pressure, inspect oil filter clogging and bleed air inside hydraulic pipeline. Insufficient oil supply will directly reduce fan rotating speed.

Q5: What is the recommended maintenance cycle of this gear fan motor?
A5: Check shaft seal leakage and abnormal noise every 1000 working hours. Replace hydraulic oil and filter regularly to keep hydraulic oil clean.

warehouse