194-8384 283-5992 CAT Hydraulic Fan Gear Pump 330C 330CL

Product Overview

The 194-8384 / 283-5992 is the core power component of the hydraulically driven cooling fan system for the Caterpillar 330C Series excavators. This gear pump converts hydraulic system pressure oil into mechanical energy to drive the cooling fan motor, ensuring reliable heat dissipation for the engine and hydraulic system under high-temperature operating conditions. In the Caterpillar official parts catalog, it is referred to as the Hydraulic Fluid Fan Pump.

194-8384 and 283-5992 are interchangeable part numbers for the same product. This pump is compatible with Caterpillar 330C Series excavators, including 330C, 330C L, 330C LN, 330C FM, 330C MH models, paired with the Caterpillar C-9 engine. It is also compatible with the Caterpillar 325 Series. As an alternative solution manufactured to Caterpillar OEM specifications, this product enables direct form-fit-function interchangeability with original units—no modifications to piping or mounting interfaces required. Our replacement solution strictly adheres to Caterpillar technical standards and undergoes 100% simulated in-service testing to ensure performance, reliability, and service life identical to OEM products.

Technical Specifications 

Applicable Models (Primary):

• 194-8384 / 1948384

• 283-5992 / 2835992

Product Type:

• Hydraulic Gear Pump / Hydraulic Fan Pump

Engine Compatibility:

• Caterpillar C9 Engine

Machine Compatibility:

• Caterpillar 330C, 330C L, 330C LN, 330C FM, 330C MH

• Caterpillar E330C / E330C L

• Caterpillar 325 Series

Technical Specifications (estimated based on similar products and engineering experience, for reference only):

• Pump Type: External Gear Pump

• Body Material: Cast Iron Housing

• Displacement: Approx. 8 – 12 cc/rev (estimated)

• Rated Operating Pressure: Approx. 200 – 250 bar (estimated)

• Maximum Speed: Approx. 2,500 – 3,000 rpm (estimated)

• Rotation Direction: Per specific configuration (verify with original unit)

• Mounting: Flange Mount

• Dimensions (reference): 174 × 130 × 170 mm

• Weight (reference): Approx. 4 – 6 kg (estimated)

Key Technical Advantages

1. Cast Iron Housing — Superior Durability
This fan pump features a cast iron housing and gear pump construction, designed to withstand continuous operation under high-temperature, high-pressure conditions in hydraulic cooling fan systems. The cast iron material provides excellent rigidity and impact resistance, ensuring long-term reliability in harsh working environments.

2. Optimized for C9 Engine Cooling System
The pump is specifically designed for the Caterpillar C9 engine and 330C Series excavator cooling system. Precise flow and pressure matching ensures the cooling fan delivers adequate airflow under various engine speeds and load conditions, effectively preventing engine overheating.

3. Direct Interchange Design — Easy Installation
194-8384 / 283-5992 is designed to Factory Fit specifications, with mounting interfaces identical to the original, enabling direct replacement of the Caterpillar OEM part number. No modifications to piping or mounting interfaces are required, significantly reducing maintenance downtime.

4. Strict Quality Control and Factory Testing
Every pump undergoes rigorous factory testing to ensure stable and reliable performance. A 6-month warranty is provided against manufacturing defects.

Application Areas

• Excavator Hydraulic Cooling Systems: Caterpillar 330C, 330C L, 330C LN, 330C FM, 330C MH Series excavator engine and hydraulic oil cooling fan drive

• Export Models: Caterpillar E330C / E330C L

• Other Compatible Models: Caterpillar 325 Series

Expert Maintenance Tips

1. Pre-Installation Verification

• Hydraulic gear pumps may vary by mounting position, shaft type, flange shape, oil port direction, gear specifications, rotation direction, and machine configuration.

• Final fitment should be confirmed by the old pump number, mounting flange, shaft structure, oil port layout, rotation direction, and machine information.

• Machine model alone is not sufficient for final confirmation. Compare the removed pump with the replacement unit before ordering.

2. Installation Precautions

• This pump is a uni-directional rotation pump—verify that the system’s required rotation direction matches the pump’s identification marking before installation.

• Ensure coaxial alignment between the pump and drive shaft; flexible couplings are recommended to avoid radial loads on the pump shaft.

• Ensure reliable sealing of inlet and outlet port connections to prevent leakage.

3. Start-Up & Commissioning

• Use jog start method for initial start-up; verify correct rotation direction before continuous operation.

• After start-up, allow the pump to operate under system pressure; observe whether fan speed is normal and check for abnormal noise or leakage.

4. Routine Maintenance

• This fan pump itself is maintenance-free; however, regular maintenance of the entire hydraulic system is essential for trouble-free pump operation.

• Regularly inspect system fluid cleanliness and replace filters as needed.

• If abnormal fan system performance, unstable auxiliary hydraulic pressure, pump noise, oil leakage, low flow output, or overheating occurs, the pump should be inspected or replaced promptly.