CAT 5055180 (505-5180) Fan Motor | Fits 336 340 345 349 350 352 355 Excavator

CAT 5055180 (505-5180) Fan Motor | Fits 336 340 345 349 350 352 355 Excavator

Premium engine fan motor designed as a direct OEM-compatible replacement for Caterpillar 336, 340, 345, 349, 350, 352, and 355 excavators. Built to deliver reliable cooling system performance and long service life in demanding mining, quarry, and heavy excavation applications.

Product Highlights

• Part Number: 5055180 / 505-5180
• Direct Fit: No modifications required
• High Performance: Meets or exceeds original Caterpillar specifications
• Durable Construction: Precision-engineered for long service life
• Wide Application: Suitable for mining, quarry, and heavy excavation projects

Technical Specifications

• Part Number: 5055180 / 505-5180
• Product Type: Engine Fan Motor
• Brand Compatibility: Caterpillar (CAT)
• Application: Engine Cooling System
• Warranty: 12 Months

Compatible Models

This fan motor fits the following Caterpillar excavators:

• Caterpillar 336 Excavator
• Caterpillar 340 Excavator
• Caterpillar 345 Excavator
• Caterpillar 349 Excavator
• Caterpillar 350 Excavator
• Caterpillar 352 Excavator
• Caterpillar 355 Excavator

Applications

• Engine Cooling Fan Drive System
• Hydraulic Oil Cooling System
• Radiator Cooling and Heat Dissipation
• Mining, Quarry, and Heavy Excavation Projects

Why Choose This Fan Motor?

• Quality Guaranteed - Manufactured to meet OEM standards
• Ready to Ship - In stock and available for immediate dispatch
• Expert Support - Technical assistance available
• Competitive Pricing - Cost-effective alternative to dealer parts

Frequently Asked Questions

Q: What are the symptoms of a failing engine fan motor on CAT 336, 340, 345, 349, 350, 352, or 355 excavators?
A: Common signs include engine overheating during normal operation, the cooling fan not spinning or spinning slowly, hydraulic-driven fan failing to respond to temperature changes, unusual noise (grinding or whining) from the fan motor area, and visible hydraulic oil leakage around the fan motor. These CAT excavator models are widely used in mining, quarry, and heavy excavation — overheating can lead to catastrophic engine failure, turbo damage, and expensive downtime.

Q: Does the 5055180 fit all seven excavator models?
A: Yes, the 5055180 (505-5180) is designed as a direct OEM-compatible replacement for the CAT 336, 340, 345, 349, 350, 352, and 355 excavators. These models share the same fan motor mounting and hydraulic drive architecture. Contact us with your excavator serial number to confirm exact compatibility.

Q: What does the fan motor do on these CAT excavators?
A: The fan motor is a hydraulic-driven motor that spins the engine cooling fan. It is controlled by the engine cooling system — as coolant temperature rises, hydraulic flow to the fan motor increases, speeding up the fan to dissipate heat. A failing fan motor causes inadequate cooling, leading to engine overheating, especially in hot weather or under heavy excavation load (mining, quarry, heavy construction).

Q: Should I check the hydraulic system when replacing this fan motor?
A: Yes. Before installing the new fan motor, inspect the hydraulic lines, fittings, and cooling system for contamination, blockages, or damaged O-rings. Flushing the hydraulic circuit and replacing the hydraulic filter is strongly recommended to prevent contaminant-driven failure of the new motor. Excavators operating in mining and quarry environments are exposed to extreme contamination — skipping the flush will likely destroy the new motor within hours.

Q: What type of hydraulic oil is recommended for the fan motor circuit on these CAT excavators?
A: Caterpillar specifies Cat HYDO Advanced 10W or 30W hydraulic oil for the fan motor hydraulic circuit. Using non-CAT approved hydraulic fluids can cause accelerated wear, seal failure, and void the warranty. In demanding mining and quarry applications, more frequent hydraulic oil and filter changes are strongly recommended.

Q: How do I confirm this is the correct fan motor for my CAT excavator?
A: Check the part number on your current fan motor — if it reads 5055180 or 505-5180, this is the correct replacement. If the label is worn or missing, provide your excavator serial number and we will verify compatibility before you order.

Q: Does this fan motor come with mounting hardware or gaskets included?
A: The fan motor is supplied as a complete unit. Depending on your excavator configuration, you may need separate mounting bolts, hydraulic fittings, gaskets, or O-rings. Contact us with your serial number and we will confirm exactly what is included and what additional parts you may need for installation.

Q: What is the warranty on this engine fan motor?
A: This fan motor comes with a 12-month warranty covering manufacturing defects. The warranty does not cover damage caused by contaminated hydraulic oil, improper installation, failure to flush the hydraulic system, or using non-CAT approved hydraulic fluids.

Looking for this fan motor? Contact us today for pricing, availability, and lead time information.

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