Product Details

Product Overview

This high-quality thermostat is specifically designed for the Kubota D902 diesel engine, ensuring optimal engine operating temperature at 82°C (179.6°F). As a critical component of the engine’s cooling system, this thermostat regulates coolant flow to maintain efficient combustion, reduce emissions, and prolong engine life. Suitable for global distribution, this part is a direct replacement for OEM number 15521-73010 and is stocked for rapid delivery to major markets including North America, Europe, and Asia-Pacific.

Key Features & Benefits

• Precision Temperature Control: Opens at 82°C to ensure the engine reaches and maintains its ideal operating temperature quickly, reducing cold-start wear and improving fuel efficiency.
• Durable Construction: Manufactured from high-grade stainless steel and engineered wax-pellet elements for reliable, long-term performance under extreme thermal cycling.
• Direct Fit Replacement: Matches OEM dimensions and specifications exactly, ensuring a hassle-free installation without the need for modifications.
• Enhanced Engine Protection: Prevents overheating and overcooling, which can lead to thermal stress, increased emissions, and reduced engine lifespan.
• Rigorous Quality Testing: Each thermostat is tested for opening temperature and flow characteristics to meet or exceed OEM standards.

Technical Specifications

OEM Cross-Reference

This thermostat is a direct cross-reference for the following OEM numbers, ensuring compatibility with genuine Kubota parts:

• Kubota: 15521-73010
• Alternative Part Numbers: 15521-73011, 15521-73012 (where applicable)

Compatibility

• Engine Models: Kubota D902 (specifically D902-E, D902-E2 series)
• Applications:
  • Kubota BX Series Sub-Compact Tractors (e.g., BX1860, BX2360, BX2660)
  • Kubota RTV400 / RTV500 Utility Vehicles
  • Kubota ZD Series Zero-Turn Mowers (e.g., ZD326)
  • Kubota KX Series Mini-Excavators (e.g., KX41-3)
  • Generators, welders, and other industrial equipment powered by the Kubota D902 engine

Global Supply & Distribution

We specialize in the global distribution of Kubota engine components, serving a diverse network of dealers, repair shops, and OEM distributors. Our logistics network ensures:

• Worldwide Shipping: Reliable courier and freight options to over 50 countries, including the USA, Canada, Germany, Australia, and Japan.
• Fast Delivery: Stock items shipped within 24 hours to major ports (e.g., Los Angeles, Rotterdam, Shanghai) and industrial hubs.
• Bulk & Wholesale Orders: Volume discounts available for commercial buyers and workshops.
• Trade Compliance: All products are packaged and documented for smooth customs clearance (HS Code 8483.40).

Quality Assurance

• Manufacturing Standards: Produced in ISO 9001:2015 certified facilities with strict quality control.
• Testing: Each thermostat undergoes a functional test to verify the opening temperature (82°C ± 2°C) and valve lift.
• Warranty: Backed by a 12-month warranty against manufacturing defects.

FAQ

1. Is this thermostat a direct replacement for my Kubota D902 engine?
Yes, this thermostat (OEM 15521-73010) is a direct drop-in replacement for the Kubota D902 engine. It matches the factory dimensions and opening temperature of 82°C. Always ensure your engine model is D902 (check the engine data plate) and that the gasket surface is clean before installation.

2. What happens if I install a thermostat with a different temperature rating (e.g., 71°C or 88°C)?
Using an incorrect temperature rating can cause the engine to run too cold or too hot. A 71°C thermostat may prevent the engine from reaching optimal operating temperature, leading to increased fuel consumption and carbon buildup. An 88°C thermostat may cause overheating, especially in warmer climates. Always use the specified 82°C thermostat for the D902 engine to maintain proper thermal management.

3. How do I test if my old thermostat is faulty?
To test the thermostat, remove it from the engine and place it in a pot of water with a thermometer. Heat the water slowly. The thermostat should begin to open around 80°C and be fully open by 82-85°C. If it remains closed at 90°C or fails to close after cooling, it is faulty and requires replacement. We recommend replacing the thermostat and gasket together as a maintenance set every 1000 operating hours.

Our advantages

1.An authorized wholesaler of Isuzu genuine parts, Hino genuine parts, Mitsubishi genuine parts and Mahle parts.

2. We are not only supply genuine parts, but also high quality OEM parts, which are made in China or made in Japan.

3. More than 10 years of experience in machinery parts, professional supply of diesel engine parts.

4. Fast delivery, the fastest can be shipped in one day ,more than 500,000 of different types parts in stock.

5. Scientific ERP system, easy and fast to locate the parts that customer needs.

6. Professional technician checks the parts before delivery, to make sure the parts are correct, usable and defect-free.

Exhibition

Packing&Shipping

1.  Our shipment is by air/sea/express (DHL/FEDEX/TNT/UPS/EMS).

2.  Once we get confirmation of payment, we will ship products in 2 days.

3.  Our packaging is standard export wooden box or others as your requirement.

4. We’ll check and test the products before shipping , and givethe pictures to our customers to confirm.

FAQ

Q1. What is your company major products?

A: Our main products are Liner kit, Piston, Rings, Liner, Gasket kit, Bearing, Injection pump, Nozzle, Water pump, Oil pump,Crankshaft, Turbocharger,Filter, etc.

Q2.What is the MOQ?

A: Normally we can supply any quantity if we have in stock.

Q3. What is your payment term ?

A: We accept Western Union, T/T, Paypal.

Q4. What is the packing ?

A: Carton or wooden case , If you want to put your logo on the packing , We will do it after get your authorization letter.

Q5. When can you deliver products after payment ?

A: By Express ,usually might take 3-4 days ;By Air , Usually take 7-9 days ; By Sea ,usually take 1-2 months .

Q6. What can you do to complete order perfectly ?

A: In the beginning , We will communicate with clients in details to understand what they need .

Before packing , We will check the products and send photos to clients .After confirmation ,

We will packing products well to avoid damage . Once we get tracking number ,

We will send it to customer and keep contact in with clients .