266-8034 Hydraulic Fan Motor for Caterpillar 345C excavator

product parameters

Part No：266-8034
Product Type：Hydraulic Axial Piston Fan Motor
Applicable Machine：Caterpillar 345C,345CL Excavator
Main Material：High-strength cast iron housing, hardened alloy steel piston & cylinder block, copper alloy sliding bearing, fluororubber sealing components
Rated Working Pressure：250 bar
Max Instantaneous Peak Pressure：290 bar
Working Rotation Speed Range：0 ~ 3300 rpm
Recommended Operating Hydraulic Oil：AW32 / AW46 anti-wear hydraulic oil
Adaptable Temperature：-20℃ ~ +120℃
Allowable Oil Viscosity Range：10 ~ 500 mm²/s
Overall Dimension：238mm ×180mm ×152mm
Net Weight：Approx.16.5kg
Interface Specification：Standard hydraulic oil port, inlet port Φ26mm, outlet port Φ21mm
Accessories：Comes with complete matching sealing kits (O-rings, backup rings)
Testing Standard：100% full-load bench speed, pressure and internal leakage calibration test
Packaging：Independent anti-rust packaging + neutral export carton

• Stable rotary output, reliable temperature control under heavy-duty working conditions
Consistent rotary torque is maintained under sudden pressure fluctuations. Even under long continuous heavy loads in dusty, high-temperature construction sites, the motor delivers steady power to the cooling fan, keeping engine temperature within the safe working window. It effectively eliminates the risk of engine overheating, cylinder scuffing and power derating caused by insufficient cooling during heavy-duty excavation, hauling and climbing operations.
• Sensitive speed response, matched cooling power
Rotating speed responds quickly to hydraulic pressure variation. It automatically raises fan speed when engine heat load rises and slows down at low temperature. Reduces parasitic power loss of the hydraulic system, less heat buildup inside the hydraulic circuit helps cut fuel consumption, reduce overall machine running costs and improve fuel economy for long-hour jobs.
• Direct replacement design, saving maintenance time
Fully consistent with OEM mounting dimensions, flange position, spline shaft and oil port layout. Plug-and-play installation without cutting, welding or modifying hydraulic pipelines. It greatly shortens on-site overhaul time, cuts labor cost and reduces machine idle period. Convenient for field repair in remote construction sites.
• High pressure impact resistance & low noise operation
High-strength cast iron housing effectively absorbs vibration and resists pressure shock. Optimized piston structure reduces flow pulsation and running noise. It maintains quiet and stable operation even under frequent pressure spikes, avoiding harsh knocking noise transmitted into the cab.

FAQ 

Q1: What equipment is the 266-8034 fan motor suitable for?
A1: It fits Caterpillar 345C,345CL excavator cooling hydraulic system. It is fully interchangeable with part number 225-4614,295-9429. Please confirm machine model before installation to avoid mismatch, wrong model may lead to poor cooling performance.

Q2: What failures can this fan motor solve?
A2: It can effectively repair common cooling system faults: engine overheating, fan rotating slowly, fan not spinning, motor abnormal knocking noise, high hydraulic oil temperature. These symptoms are usually caused by aging, piston wear or internal leakage of original fan motor.

Q3: Does it need adjustment after installation?
A3: After installation, bleed air from hydraulic circuit fully. Normally it can work directly. If temperature still abnormal after installation, inspect relief valve setting, fan blade condition and radiator blockage to get better cooling effect.

Q4: What is the product warranty and scope of exemption?
A4: 12-month professional warranty under standard installation and normal use. Damage caused by contaminated hydraulic oil, oil shortage, wrong installation torque, clogged filter, unauthorized disassembly & modification or mechanical failure is not covered by warranty. Warranty is only valid following proper operation.

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