
Komatsu PC400-8 Fuel Injector 2008-2012: OEM RM6251-11-3100 ( Set of 6 )
KOMATSU PC400-8 FUEL INJECTOR 2008-2012: OEM RM6251-11-3100 ( SET OF 6 )

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Genuine New, Komatsu Fuel Injector, Komatsu part number 095000-6070RM-SET ( OEM Part Number RM6251-11-3100 ).This part is primarily made for a Komatsu PC400-8, production years 2008-2012, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
OEM NUMBERS
| Primary OEM | RM6251-11-3100 |
| Additional OEM | 6251-11-3100, RM6251-11-3100 |
ADDITIONAL DETAILS
| CONDITION | Genuine New |
| UPC / Barcode | 00840490542006 |
| WEIGHT | 12.00 LBS |
SHIPPING OPTIONS
Ship Weight : 12.00 LBS
UPS Ground, 2nd Day Air, Next Day Air
SHIPPING POLICY
Tamerx Diesel Products ships via UPS Ground. Next day air shipping can be arranged for a reasonable price of anywhere from $50.00 - $100.00 depending on the weight of the product and your location. We will do everything we can to make sure that you get the service you need. We understand how important it is to receive your order as quickly as possible.
In most cases Tamerx Diesel Products only needs one address, as long as your product is shipping to the same location as your billing information. In order to eliminate credit card fraud, your billing information must match the credit card you provide.
The terms, conditions, and details of our warranty vary from product to product. Specific warranty details can be found below.
Tamerx Diesel Products provides a replacement warranty on all of our parts. The duration and mileage limitations of the warranty vary by product and are specified on the product's detail page/item listing.
Please note that the warranty covers replacement of the part and the cost of shipping the replacement part to you only. It does not cover any shop, labor, towing, or any similar or related costs. This is not a "money back guarantee".
If you experience a problem with your part or it is not functioning properly, the correct warranty procedure is to call us at (510) 257-1777 (8:00 AM - 5:00 PM ET Monday through Friday). Be sure to have your order number and/or other relevant order information ready so we can easily locate your order and resolve your issue as quickly as possible. From that point, we will review with you any troubleshooting steps that may need to be taken and other areas or systems that can be checked to rule out external problems contributing to your part's issue. If a replacement is determined to be necessary, we will then arrange for your replacement part to ship out ASAP and issue any necessary return shipping labels and/or documents.
As is the case for the majority of the diesel products sold on Tamerx Diesel Products, your part's warranty is active as soon as you install it. In some other cases, warranty activation is contingent upon you sending us your core (i.e., your old part). Tamerx Diesel Products will provide you a return shipping label for parts that have a warranty with a core return condition. When we have received your core return, the part's warranty coverage begins. We reserve the right to void the product warranty if your core is not received within the allotted time, or if it isn't received at all. If the warranty for the diesel part you are purchasing has a core return requirement, it will be clearly noted on the product detail page/item listing.
What is a Core Charge?
A core charge (also called "core deposit") is similar to the deposit you might pay for a can or bottle of soda and is a standard requirement in the auto parts industry. For example, in many states, to promote recycling, you pay a deposit when you purchase a can of soda and receive your deposit back when you return the empty can. Many automotive parts have a core charge, or core price, that works in essentially the same way as a soda can deposit.
30 Day Core Charge Hold
You authorize Tamerx Diesel Products, to hold your credit card for the specified core charge amount and that you agree to return your core with 30 days of receiving the purchased part. When we have received your core return, the hold is released and the core charge payment is canceled.
The customer, or parts buyer, is responsible for any shipping costs associated with core returns unless otherwise specified in the product listing/detail page. Tamerx Diesel Products offers prepaid UPS shipping labels (SKU numbers UPS-CR1 and UPS-CR2) for use in returning your core that are available for purchase on our website during your shopping/order process.
The shipping label you will need to use for the core return is dependent upon what part you are purchasing. UPS-CR1 is good for cores weighing up to 20 pounds. UPS-CR2 is appropriate for shipping cores weighing 21 pounds or more. You must include enough information with the core return that clearly identifies it as a.) a Core Return, and b.) contains enough information we can use to clearly associate the core return with your order. Including a copy of the invoice or packing slip that came with the original shipment, clearly marked "Core Return", is ideal. Alternately, you can include a note marked as "Core Return" that includes your order number, full name and address, and phone number or other contact information. Failure to include this information with your returned core will most likely delay any due core credit being issued and/or delay any applicable warranty activation. Core returns need to be for the exact part purchased and cannot be damaged. Substituting another part in place of the part you have purchased is not acceptable.
All fluids must be drained.
If you have purchased a set or a parts package, you will need to return cores for all components of the set. For example, if you have purchaed a high pressure oil pump with an IPR valve, you will need to return both HPOP and IPR valve cores to receive proper credit. If you have purchased an EGR cooler/EGR valve package, your core return must consist of an EGR cooler core and an EGR valve core, or core credit will not be given.
Core Charges are often mandated by state legislature, and, as such, the actual core charge and taxes on the charge may vary depending on the state in which you buy your part. The Tamerx Diesel Products core charge presented to you online today with your item is representative of the most common core charge.
Designed for Komatsu PC400-8 excavators built between 2008 and 2012, the Fuel Injector Set OEM RM6251-11-3100 includes six genuine OEM injectors engineered for precision fuel delivery and consistent engine performance. Manufactured to factory specifications, these injectors ensure accurate fitment and reliable operation under demanding construction conditions. By maintaining optimal fuel atomization and combustion, they help support engine efficiency and reduce emissions. Built for durability, each injector is constructed to withstand the high pressures and intense workloads of heavy equipment use. For operators and fleets, this complete injector set delivers OEM-certified quality, long-lasting reliability, and balanced engine performance.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2008 | Komatsu | PC400-8 | ||||
| 2009 | Komatsu | PC400-8 | ||||
| 2010 | Komatsu | PC400-8 | ||||
| 2011 | Komatsu | PC400-8 | ||||
| 2012 | Komatsu | PC400-8 | ||||
PEOPLE ALSO ASKS | BLOG(S)
The Komatsu PC400-8, equipped with the OEM RM6251-11-3100 fuel injectors, relies on precision-engineered components to deliver efficient fuel combustion. Each injector in this set of six is built to handle the high pressure and accuracy demands of modern diesel engines, ensuring that every drop of fuel is used effectively.
Main Components
- Injector Body
- The durable outer shell that houses and protects all internal parts while connecting the injector to the engine cylinder head.
- Nozzle Tip
- A finely machined tip that atomizes the diesel fuel into a precise spray pattern for clean combustion.
- Plunger and Barrel Assembly
- Works together to pressurize fuel before injection, creating the high pressure needed for efficient atomization.
- Control Valve / Solenoid
- Opens and closes under signals from the engine control unit (ECU) to regulate injection timing and duration.
- Check Valve
- Maintains proper fuel pressure and prevents backflow when the injector is not firing.
- Return Spring
- Ensures smooth and consistent plunger movement for accurate fuel delivery.
- Seals and O-Rings
- Prevent leaks and maintain pressure integrity within the injector.
- Fuel Ports
- Allow fuel to enter and exit the injector in a controlled flow path.
Why These Components Matter
Together, these parts ensure the Komatsu PC400-8’s injectors deliver precise fuel dosing, optimal combustion, and long-term reliability. The OEM RM6251-11-3100 set of six is engineered for consistent performance, helping maintain power, fuel economy, and reduced emissions in demanding job site conditions.
Fuel injectors are essential components of your engine’s fuel system. They deliver precise amounts of fuel into the combustion chamber, ensuring smooth operation and efficiency. Like any part, they wear out over time — but with proper care, they can last for years.
Average Lifespan of a Fuel Injector
Most fuel injectors last between 80,000 and 100,000 miles. In well-maintained vehicles, they can even reach 150,000 miles or more. However, factors like driving conditions, fuel quality, and maintenance habits can greatly influence their longevity.
Factors That Affect Injector Lifespan:
- Fuel quality
- Contaminated or low-grade fuel causes buildup and clogging
- Maintenance
- Skipping fuel filter changes can shorten lifespan
- Driving environment
- Dusty or harsh conditions increase wear
- Engine use
- Frequent idling or stop-and-go driving adds stress
- Additives and cleaners
- Regular use of approved fuel system cleaners can help prevent deposits
How to Extend Injector Life
To keep your fuel injectors working longer:
- Use high-quality fuel and change filters on schedule
- Add a fuel system cleaner periodically
- Avoid running the tank too low, which pulls in debris
- Schedule regular maintenance inspections
A fuel injector typically lasts around 100,000 miles, but consistent maintenance and clean fuel can extend its life significantly. Proper care not only saves on repairs but also keeps your engine running efficiently.
Rough idling, loss of efficiency, and excessive smoke are common signs of injector wear.
You can confirm fitment by matching the OEM number RM6251-11-3100 with your machine’s parts documentation.
OEM injectors ensure proper fit, reliable fuel delivery, and long-term engine protection.
It is a genuine OEM set of six fuel injectors designed for Komatsu PC400-8 excavators built between 2008 and 2012.










