259-0814 Hydraulic Fan Pump for Caterpillar 345C excavator

product parameters

Part No：259-0814
Product Type：Hydraulic Piston Fan Pump
Applicable Machine：Caterpillar 345C,345CL Excavator
Pump Structure：Variable displacement piston pump
Displacement：32 cc/rev
Main Material：High-strength cast iron pump housing, hardened piston & cylinder block assembly, copper alloy sliding bearing, fluororubber sealing components
Rated Working Pressure：250 bar
Recommended Operating Hydraulic Oil：AW32 / AW46 anti-wear hydraulic oil
Adaptable Temperature：-20℃ ~ +120℃
Allowable Oil Viscosity Range：10 ~ 500 mm²/s
Overall Dimension：242mm ×178mm ×156mm
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 flow, pressure and internal leakage calibration test
Packaging：Independent anti-rust packaging + neutral export carton

• Precise flow regulation, lower energy consumption
Hydraulic flow matches cooling demand dynamically. When the engine is cold or operating under light load, the fan consumes less power, reducing parasitic power loss of the main 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 piston, cylinder block and sliding bearings are made of high-alloy steel and copper alloy 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 pump 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 pump undergoes strict full-load bench testing of flow, pressure curve 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 pumps.
• High pressure impact resistance & low noise operation
High-strength cast iron pump housing effectively absorbs vibration and resists pressure shock. Optimized plunger 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 259-0814 fan pump suitable for?
A1: It fits Caterpillar 345C,345CL excavator cooling hydraulic system. It is fully interchangeable with part number 259-0815,10R-8707. Please confirm machine model before installation to avoid mismatch, wrong model may lead to poor cooling performance.

Q2: What failures can this fan pump solve?
A2: It can effectively repair common cooling system faults: engine overheating, fan rotating slowly, fan no rotation, pump abnormal knocking noise, high hydraulic oil temperature. These symptoms are usually caused by aging, plunger wear or internal leakage of original fan pump.

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 and radiator blockage to get better cooling effect.

Q4: What pre-installation preparations are required?
A4: Clean hydraulic pipeline and radiator thoroughly to remove sludge and impurities; replace brand-new hydraulic filter and sealing kit; check matching fan motor condition, to avoid secondary damage caused by pipeline contaminants. Clean hydraulic system is critical for fan pump service life.

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