235-2716 Cat Hydraulic Fan Pump 280Bar

Product Overview

The 235-2716 is a high-performance axial variable displacement piston pump engineered specifically for the hydraulic fan drive system of Caterpillar (Cat) 330D, 336D, 340D, and 340D2 excavators. Cross-referenced with OEM part numbers 2352716 and 259-0815, this pump delivers 100% direct drop-in interchangeability with original Caterpillar fan pumps. Every unit undergoes 100% full-load simulated factory testing prior to dispatch, guaranteeing precise proportional fan speed control, high volumetric efficiency, and exceptional endurance under heavy-duty cooling demands.

Technical Specifications

• Primary Model Code: 235-2716 (Cross-reference: 2352716, 259-0815)

• Brand Compatibility: Caterpillar (Cat)

• Equipment Fit: Cat 330D, 336D, 340D, 340D2 Excavators & M330D Wheel Loaders/Excavators

• Pump Design: Swashplate Axial Variable Displacement Piston Pump (Hydraulic Fan Drive)

• Displacement: 28 cm³/rev

• Rated Continuous Pressure: 280 bar (4000 psi)

• Peak Operating Pressure: 350 bar (5075 psi)

• Maximum Drive Speed: 2400 rpm

• Control Mechanism: Proportional Pressure Control (EPC / Solenoid Valve Control)

• Unit Weight: Approx. 19.5 kg

Key Technical Advantages

• Precision Proportional Fan Control: Integrated high-response proportional solenoid valve continuously modulates displacement based on engine ECM thermal signals, optimizing fan speed to drastically reduce engine fuel consumption and operating noise.

• Micro-Finished Bimetallic Tribology: Cylinder block and piston shoes utilize nitrided high-strength alloy steel paired with sintered bronze valve plates to eliminate internal bypass leakage and resist thermal wear under continuous 280 bar pressure.

• 100% Direct Drop-in Fit: Manufactured strictly to OEM Caterpillar mounting patterns, shaft splines, and port connections, enabling hassle-free plug-and-play replacement without plumbing modifications.

• 100% Factory Simulated Load Testing: Dynamically tested under full working pressure, peak RPM, and electronic signal cycles on automated test benches to verify zero external leakage and rapid flow response.

Application Areas

• Caterpillar Heavy Excavators: Primary hydraulic fan drive pump for Cat 330D, 330D L, 336D, 336D L, 340D, and 340D2 crawler excavators.

• Caterpillar Wheeled Machinery: High-pressure hydraulic cooling circuit pump for Cat M330D series wheel loaders and wheeled excavators.

Expert Maintenance Tips

Flush the fan drive hydraulic circuit thoroughly and replace all system filters before installation. Maintain fluid cleanliness strictly at ISO 18/16/13 (NAS Class 8) or cleaner using ISO VG 46/68 anti-wear hydraulic oil. Always pre-fill the pump housing completely with clean hydraulic fluid through the top case drain port prior to initial start-up, and verify solenoid electrical connections to protect friction surfaces against dry friction wear.