
Product Overview
This is a premium replacement Flywheel Gear (Ring Gear) engineered for Komatsu 6D125 diesel engines. Designed to meet or exceed OEM specifications, this critical component ensures reliable engine starting and smooth operation. We supply this part globally to distributors, workshops, and heavy equipment fleets across North America, Europe, the Middle East, Asia-Pacific, and Africa, supporting the maintenance of vital industrial and construction machinery.
Key Features & Benefits
- Precision Engineered: Manufactured to exact OEM dimensions (OEM Size) for a perfect fit and seamless engagement with the starter motor.
- Enhanced Durability: Crafted from high-grade materials to withstand high torque and repetitive stress, ensuring long service life under demanding conditions.
- Optimal Performance: The precisely cut 148-tooth gear profile guarantees reliable engine cranking, minimizing starter wear and preventing misfires.
- Rigorous Quality Control: Each part undergoes thorough inspection, supported by machinery test reports and video outgoing-inspection for verified quality.
- Global Compliance: Packaged and documented for international shipping, adhering to standard export procedures for hassle-free logistics.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Type | Flywheel Gear / Ring Gear |
| OEM Part Number | 6150-31-1341 |
| Compatible Engine Model | Komatsu 6D125 |
| Engine Type | Diesel |
| Tooth Count | 148 Teeth (148T) |
| Weight | Approximately 2 kg |
| Size | OEM Standard Size |
| Packing | Plastic Bag, Box, Carton |
| Selling Unit | Single Item |
| Place of Origin | Guangdong, China |
OEM Cross-Reference
This part is a direct replacement for the following OEM number:
- Komatsu: 6150-31-1341
Note: Always cross-reference with your engine’s serial number or existing part for 100% compatibility confirmation.
Compatibility
This flywheel gear is specifically designed for the Komatsu 6D125 diesel engine. This engine is commonly found in a wide range of heavy machinery and vehicles, including:
- Forklifts
- Excavators
- Trucks
- Loaders
- Bulldozers
- Buses
- Other industrial equipment powered by the 6D125 engine.
Global Supply & Distribution
We are a trusted supplier in the global automotive aftermarket, specializing in efficient international logistics for B2B clients.
- Worldwide Shipping: We export to all major markets, including the USA, Canada, Germany, UAE, Australia, Japan, and South America.
- Fast Delivery Network: Consolidated shipments ensure cost-effective and timely delivery to major ports and industrial hubs worldwide.
- Export Expertise: Comprehensive documentation (Packing List, Commercial Invoice, Certificate of Origin) is provided to ensure smooth customs clearance.
- Bulk Order Support: We offer competitive FOB/CIF quotes and flexible MOQs to meet the needs of distributors and large-scale repair operations.
Quality Assurance
Our commitment to quality ensures you receive reliable parts that perform.
- Manufacturing Standards: Produced in ISO-certified facilities using precision machining and heat treatment processes.
- Warranty: Backed by a 6-month warranty against manufacturing defects from the date of purchase.
- Testing & Inspection: Every batch is subject to dimensional checks and functional validation. A machinery test report and video record of the outgoing inspection are available upon request.
FAQ
Q: How can I confirm this flywheel gear will fit my Komatsu 6D125 engine?
A: The primary identifier is the OEM part number 6150-31-1341. We recommend verifying this number against your old part or your engine’s official parts manual. The engine model (6D125) must also match.
Q: What is included in the packaging, and is installation guidance provided?
A> The part is supplied as a single item, securely packed in a plastic bag inside a box for protection. While basic specifications are provided, installation of a flywheel ring gear requires specialized tools (e.g., a press, heating equipment) and technical expertise. We recommend consulting a Komatsu service manual or a certified mechanic for proper installation procedures to avoid damage.
Q: Do you provide documentation for international import and quality verification?
A> Yes. With every order, we provide full commercial export documentation. For quality verification, we can supply the machinery test report and a video of the outgoing inspection for the specific batch upon request, which is a standard practice for our B2B clients.
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 .