155-9107 Hydraulic Fan Motor for Caterpillar 345B excavator

product parameters

Part No：155-9107
Applicable Machine：Caterpillar 345B Excavator
Motor Structure：Fixed displacement axial piston motor
Displacement：30 cc/rev
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
Net Weight：Approx.16.2kg
Mounting Form：Flange mounting
Shaft Specification：Splined drive shaft
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.
• **Premium wear-resistant core components, strong anti-pollution capacity**
The pistons, cylinder block and output shaft adopt alloy steel with ultra-precision grinding treatment. The surface hardness and wear resistance are greatly improved. It can tolerate fine solid particles mixed in hydraulic oil, slowing down abrasive wear of internal parts. This reduces the risk of premature motor failure caused by contaminated oil and greatly extends service life, minimizing unexpected downtime of excavators.
• **Full bench testing for every unit, excellent performance consistency**
Each finished motor undergoes strict full-load bench testing of speed curve, pressure and internal leakage before shipment. Strict machining tolerance control ensures uniform performance across batches. Individual performance deviation is kept minimal. It is ideal for bulk maintenance and fleet overhaul, avoiding inconsistent cooling effect from different replacement motors.

FAQ 

Q1: What equipment is the 155-9107 fan motor suitable for?
A1: It fits Caterpillar 345B excavator cooling hydraulic system. It is fully interchangeable with part number 1559107. 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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