234-4638(10R-8694)/242-6776/233-2530 Hydraulic Fan Motor for Caterpillar 330D excavator

product parameters

Part No：234-4638(10R-8694)/242-6776/233-2530
Product Type：Hydraulic Axial Piston Fan Motor
Applicable Machine：Caterpillar 330D,330DL,336D,336DL Excavator
Motor Structure：Fixed displacement axial piston motor
Main Material：High-strength cast iron housing, hardened alloy steel piston & cylinder block, copper alloy sliding bearing, fluororubber sealing components
Rated Working Pressure：240 bar
Max Instantaneous Peak Pressure：280 bar
Working Rotation Speed Range：0 ~ 3200 rpm
Recommended Operating Hydraulic Oil：AW32 / AW46 anti-wear hydraulic oil
Adaptable Temperature：-20℃ ~ +120℃
Allowable Oil Viscosity Range：10 ~ 500 mm²/s
Mounting Form：Flange mounting
Interface Specification：Standard hydraulic oil port, inlet port Φ25mm, outlet port Φ20mm
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
Storage Requirements：Dry indoor storage environment, relative humidity ≤75%, avoid moisture, dust, corrosive gas and direct sunlight. Long-term storage needs periodic anti-rust inspection.

• **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.
• **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 234-4638 fan motor suitable for?
A1: It fits Caterpillar 330D excavator cooling hydraulic system, also compatible with 330DL,336D,336DL. It is fully interchangeable with part number 10R-8694,242-6776,233-2530. 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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