Product Overview

This is a premium-quality replacement rocker arm designed for Komatsu S6D108 series engines. As a trusted global supplier of heavy machinery components, we provide reliable engine spare parts to major markets worldwide, including North America, Europe, the Middle East, and Asia-Pacific. This part is engineered to restore optimal valve train performance and ensure the longevity of your Komatsu excavator engine.

Key Features & Benefits

• Precision Engineered: Manufactured to exact OEM specifications for a perfect fit and reliable operation within the valve train assembly.
• High-Durability Material: Constructed from high-grade alloy steel, heat-treated for superior strength and wear resistance under continuous high-load conditions.
• Optimized Performance: Ensures precise valve timing and lift, contributing to consistent engine power output, fuel efficiency, and reduced emissions.
• Extended Service Life: Robust design minimizes wear on both the rocker arm and valve stem tip, reducing maintenance frequency and total cost of ownership.
• Direct Replacement: Designed as a direct bolt-on component, requiring no modifications for a straightforward installation process.

Technical Specifications

OEM Cross-Reference

This part is a direct replacement for the following OEM numbers:

• Komatsu: 6221-41-5510

Note: Always verify the part number stamped on your original component before ordering to ensure correct fitment.

Compatibility

This rocker arm is compatible with Komatsu excavators equipped with the S6D108 series engine. Primary applications include, but may not be limited to:

• Engine Models: Komatsu 6D108, S6D108, SAA6D108
• Machine Models:
  • Komatsu PC300-6 Excavator
  • Komatsu PC340-6 Excavator
  • Komatsu PC350-6 Excavator
• Typical Year Range: Machines from the late 1990s to 2000s utilizing the specified engine platform.

Global Supply & Distribution

We specialize in the international export of heavy equipment parts. Our logistics network ensures efficient delivery to key industrial regions and major ports globally.

• Worldwide Shipping: Available via air freight and sea freight to all continents.
• Major Markets Served: We regularly supply distributors and workshops in North America (USA, Canada, Mexico), Europe (Germany, UK, Poland, Netherlands), the Middle East (UAE, Saudi Arabia), Asia-Pacific (Australia, Singapore, Japan), and South America.
• Fast Delivery: Consolidated shipments ensure cost-effective and timely delivery to hubs like Rotterdam, Los Angeles, Singapore, and Jebel Ali.
• Export Compliance: All documentation (Commercial Invoice, Packing List, Certificate of Origin) is provided for smooth customs clearance worldwide.

Quality Assurance

• Manufacturing Standards: Produced in ISO-certified facilities using advanced CNC machining and quality control processes.
• Rigorous Testing: Each batch undergoes dimensional inspection, material hardness testing, and visual quality checks to ensure conformance to specifications.
• Warranty: Backed by a standard warranty against manufacturing defects. Please contact us for specific warranty terms applicable to your region.
• Packaging: Individually packaged or boxed in secure, export-ready cartons to prevent damage during transit.

FAQ

Q1: How do I confirm this rocker arm fits my specific Komatsu engine?
A1: The most reliable method is to cross-reference the part number. Locate the rocker arm on your engine’s cylinder head. The OEM part number (6221-41-5510) is often stamped or cast onto the component. Match this number, and verify your engine model (S6D108, etc.) from the machine’s service manual or engine identification plate.

Q2: Is it recommended to replace a single rocker arm, or should they be replaced as a set?
A2: For optimal performance and even wear, it is strongly recommended to replace all rocker arms on the affected cylinder head as a complete set. If one rocker arm has failed due to wear or damage, others on the same valvetrain are likely experiencing similar stress and may be near failure. Replacing the set prevents imbalanced valve operation and future downtime.

Q3: What are the signs of a failing rocker arm in my Komatsu excavator engine?
A3: Common symptoms include: – Abnormal Engine Noise: A distinct ticking or tapping sound from the valve cover area, increasing with engine RPM. – Loss of Engine Power: Improper valve lift leads to reduced compression and inefficient combustion. – Increased Exhaust Smoke: Incorrect valve timing can cause unburned fuel or oil to enter the exhaust stream. – Visible Wear: During inspection, look for excessive wear at the pivot point or on the pad that contacts the valve stem.

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 .