Engine System Viscous Fan Clutch Assembly For Yamaz 020004782

Product Specification

DescriptionWe have established long-term and solid cooperative relations with many companies in the same industry in China and overseas. Our consultant team provides timely and professional after-sales service to satisfy our customers. We will send you detailed information and parameters of the products for your comprehensive understanding. We provide free samples and can arrange company visits. We welcome you to the factory for negotiation at any time. Hope to receive your consultation and establish a long-term partnership.

Service

Fantronic Clutchpro's business philosophy is simple: we are committed to providing unparalleled service to our customers.

How do we achieve this ?

1. Quality parts: We only provide the highest quality parts

2. Dedicated employees: Each of our employees is wholeheartedly committed to meeting customer expectations.

3. Technical expertise: Years of industry experience, combined with advanced technology, enable us to identify customers' parts needs, even if it is just a vehicle chassis number.

4. Delivery service: Nopei provides 7-day delivery service worldwide.

5. After-sales service: Our commitment to customers does not stop at sales, customer satisfaction is crucial before, during and after every transaction.

Advantage

Stable quality, favorable prices, professional sales consultants, 24-hour online customer service
FAQ

1. Are you a manufacturing company or a trading company?

We are a manufacturer of fan clutches and have been in the industry for more than 20 years.

2. What types of parts can you provide?

@We are committed to providing one-stop purchasing services for heavy truck-heavy machinery users. (Especially focus on cooling system parts, fan clutch/fan blade/fan clutch water pump.

3. How long is your production lead time?

@ 1 working day for inventory; 30 days for mass production.

Express Delivery

A full range of sea and air logistics systems, providing you with the most convenient logistics experience, quick response, saving your time.

4. How is the quality and after-sales service? One year warranty, if there is any actual quality problem, we will refund or send new products as compensation.

5. What is your packaging?
Neutral packaging box or customized according to customer requirements
6. Can I provide a sample?
If the customer is willing to pay the sample fee, we can provide samples.
7. Will you test our products before shipment?
Yes, we have 100% tested before shipment.
8. How about the delivery time?
Usually 7-14 days, if the quantity is large, it will take 35 days.
9. Can you produce according to the sample?
If the quantity is suitable, we will develop according to the sample.

Q: How does silicone fluid actually make the fan clutch work?
A: It's a brilliant use of fluid dynamics. The clutch is filled with a thick silicone oil. Here's the simple principle:
1.Cold Engine: The fluid is stored in a reservoir. With little fluid between the driving and driven plates, the clutch slips, and the fan spins slowly.
2.Hot Engine: The bi-metallic spring senses heat and opens a valve. This allows silicone fluid to flow into the working chamber between the plates.
3.Shear Force: The fluid shears – its molecules want to stick to both the moving input plate and the stationary output plate. This viscous shear action transfers torque, engaging the fan up to 80-90% of engine speed.

Q: What is the purpose of the bi-metallic spring on the front?
A: The bi-metallic spring is the thermostat and the brain of the operation. It's made of two metals bonded together that expand at different rates when heated.
Cold: The spring is coiled, keeping the fluid valve closed.
Hot: Radiator heat warms the spring. The different expansion rates cause it to uncoil, which mechanically opens the valve to release the silicone fluid and engage the fan.
Its position facing the radiator is crucial, as it directly senses the air temperature coming off the radiator, not the engine coolant temperature.

Q: Why do truck fan clutches mostly use silicone oil types instead of electronic ones?
A: Truck fan clutches primarily rely on silicone oil types rather than electronic variants due to their alignment with trucks’ harsh operating conditions and heavy-duty needs. First, trucks often operate in dusty, vibrating environments—like construction sites or rural roads—where electronic components (sensors, coils, wiring) are prone to damage. Silicone oil clutches have a mechanical design with no delicate electronics, making them resistant to dust intrusion and vibration-induced failures. Second, trucks have large-displacement engines that generate high torque and heat, especially under loads (towing, hauling). Silicone oil clutches excel at transferring high torque, ensuring the fan runs fast enough to cool these powerful engines. Electronic clutches, while precise, may struggle with sustained high-torque demands over long hours. Third, maintenance is simpler and cheaper for silicone oil types. Truck operators often service vehicles with basic tools, and silicone oil clutches only need occasional oil checks or seal replacements—unlike electronic clutches, which require diagnostic tools to fix sensor or wiring issues. Finally, silicone oil clutches have a longer lifespan in high-heat, high-load scenarios, reducing downtime for truck fleets. These factors make them the practical choice for truck applications.