CAT 3406E/C15 DIESEL FUEL INJECTOR #10R2781/10R8501 

CAT 3406E/C15 DIESEL FUEL INJECTOR #10R2781/10R8501 
Price: $295.00
Part Number: 10R8501
Temporary Credit Card Hold for Cores
See Core Policy for details
Refundable Core Charge of $100.00
See Core Policy for details

Core Charge Option
Core Policy for Details
Ships Free. UPS Ground Shipping
Core Deposit. Fully refundable if returned within 60 days
1 - CAT 3406E/C15 Diesel Fuel Injector #10R2781/10R8501
1 - Return Label For Your Core (Contiguous US Customers Only
O-rings & copper crush washers as shown are preinstalled on injectors (color may vary)

*Only Caterpillar OEM nozzles to withstand the heavy demands of the modern-day diesel engine. All nozzles include AFM (Abrasive Flow Machining) to fillet/round the edges of the spray hole inlets. EDM (Electro Discharge Machine) precision-drilled spray holes and 100% flow tested for spray plume uniformity and flow balance.

* New Control Valves, New Control Valve Gasket, New Nozzle Springs.

Optional and Good to have: 

We strongly recommend replacing the return line seals and lower valve cover gaskets.

Replaces part numbers:

Caterpillar: 10R8501, 10R2781

REPLACES PART NUMBERS: 118-9030, 118-8010, 102-2014, 103-4562, 109-5021, 117-0482

140-8993, 191-3003, 211-3023, OR4300, OR4119, OR4894, OR4331, OR9257, 10R0957

Item Condition: Remanufactured

            -This is a Remanufactured product and not refurbished.

These are premium Remanufactured & tested/calibrated Caterpillar 3406E / C15 fuel injectors using only OEM (original equipment manufactured) Caterpillar cores.  These Caterpillar fuel injectors are the latest revision and up to date OEM specifications required by Caterpillar to replace the original generation legacy Caterpillar injector.

“Remanufactured” The definition:

A properly “remanufactured” injector is the functional equivalent of a new part and is virtually indistinguishable from new part performance. Remanufactured is not refurbished nor used. 

Invest in a quality product instead of being misled by false representations of a “quality” remanufactured injector.

Every Caterpillar 3406E/C15 fuel injector is completely disassembled, cleaned and 100% of all parts/components examined for wear and breakage. Worn out, missing or non-functioning components are replaced with new or rebuilt components.  After full disassembly is complete, the part is reassembled and tested for compliance with OEM Caterpillar performance specifications with the Dieselogic Cambox.

Covered Under 1 Year Unlimited Mileage Warranty

If you have any questions or concerns, please call (888) 592-8539 and our customer satisfaction team will be happy to assist you.

Core Policy

Core Policy

To dispose of your old cores, Dieselogic has (3) convenient choices:

1.  CARD ON FILE:  The customer leaves their credit card information on file securely with Dieselogic.  Old cores must be returned to Dieselogic within 28 days of the original order ship date to avoid being charged.  If customer cores are not returned within 28 days, the credit card on file will be charged the full Core Charge (see table below) and the customer be allowed an additional 28 days to return the cores for a full refund of that core charge.  Cores returned after 60 days from the original order ship date will be issued 75% refund.  Cores returned 90 days or after, after the original order ship date will be issued a 50% refund. Customers using a debit card may see a pending transaction on your bank account until the cores are returned. 


2.  PAY CORE CHARGE:  The customer’s credit card will be charged the core charge immediately upon placing the order.  The customer’s old cores must be returned to Dieselogic within 60 days of original order ship date to be eligible for full refund.  Cores returned after 60 days will be issued 75% refund.  Cores returned 90 days or after, from the original order ship date will be issued a 50% refund.


3.  RETURN CORES IN ADVANCE:  The customer will ship their old cores to Dieselogic in advance to avoid any core charge.  Their order will ship immediately once the cores are received.


EACH (1)

SET OF (6)

SET OF (8)





















All cores must be "cosmetically" in original and acceptable condition i.e. no damage to the external body.  We will not be responsible for any damage caused in transit.  The following will result in partial core refund or denial:  Cores not being "like for like" (same as what you are purchasing), Broken/missing solenoid or dividers, Broken/missing electrical connecting studs, Core tampering or suspected disassembly, Missing/damaged nozzles, Missing internal components, Missing external components.  If you have any questions regarding this policy, please contact us at 904.786.7402 or


Full Core Policy for details.


Return Policy

Returns & Warranty


Your satisfaction is important to us. You may return any item purchased from Dieselogic for any reason within 30 days from the original invoice date, provided the Product is in “brand-new” condition, is returned in the original packaging, and has NOT been installed. No refunds will be given on Products that have been installed, tampered with, contaminated, or disassembled.

To return an item, you must first request a Return Merchandise Authorization (“RMA”) number from Dieselogic. To obtain an RMA number, please call us at 800.654.8493 OR email us at, and provide the following information: original invoice number; part number; serial number (if applicable); quantity; reason for the return with as much detail as possible; and any other relevant information that will help us process the return with speed and accuracy.

Returned product must be in new, resalable condition, with all original boxes, packaging, parts, cables, manuals, etc. Upon receipt, all returns will be inspected, and, at our discretion, credit may be refused and/or a restocking fee of up to 25% may be assessed. Original shipping charges will not be refunded. Customer is responsible for shipping costs incurred to return products.

Once we have inspected the Products and confirmed they are in new and resalable condition as required by this policy, we will process your refund.

Some Circumstances in which credit will not be issued but not limited to:
  • Product is a “Special Order” item
  • Product has been installed and/or used
  • Product has been damaged from an attempt to be installed and/or used
  • Product is shipped back without original box, manual and/or parts
  • Seal on electrical parts is broken
  • Product serial number does not match that of which was original shipped to buyer
  • Product is deemed not resalable by Dieselogic due to customers own actions in dealing with the Product

For Returns, once an RMA number has been issued, you will add your RMA number to the address below and send the Product to:

Dieselogic ATTN: RETURNS/RMA#_____
2345 Harper St.
Jacksonville, FL 32204


Dieselogic warrants our Products to be free from defects in material or workmanship for a period of *1 year. (*Performance Remanufactured Products are warranted for 6 months.) The warranty period commences the day the product is shipped to the original Customer and is only valid for the original Customer. This warranty is non-transferable.

Dieselogic Limited Warranty DOES NOT COVER and therefore EXCLUDES:

  • Labor costs to install or uninstall Products
  • Labor costs incurred in diagnosis of defects or any other consequential expenses, including third party testing
  • Failures caused by fuel or oil contamination, fire damage, misuse, negligence, modification, abuse, improper application, installation or operation
  • Failures caused by unauthorized service or use of unauthorized parts
  • Failures caused by power enhancing devices or modifications
  • Any down time, towing, travel, lodging, or any other contingent expenses

This warranty is in lieu of all other express and implied warranties, including the implied warranties of merchantability and fitness for a particular purpose. Dieselogic does not assume any responsibility for incidental or consequential damages. This warranty sets out your exclusive remedies with respect to the Products covered by it. No attempt to alter, modify, or amend this warranty shall be allowed.


All warranty claims are subject to prior approval by Dieselogic. To be eligible for warranty consideration, please call us at 800.654.8493 OR email us at You must include a dated proof of purchase receipt, describe your problem, and obtain a Return Merchandise Authorization number (“RMA”). We will provide you with an RMA number and written instructions for sending the Products to us to be tested for warranty consideration. You must follow those instructions. Dieselogic does not accept Products sent to us without an RMA. We do not cover return shipping. You will need to pay for shipping the Products to us. Dieselogic is not responsible for damages caused by shipping.

If our testing confirms that a Product DOES NOT exhibit any material or workmanship defect within the testing specifications we have identified, you will be assessed a standard fee for cleaning / testing and the Product will be shipped back to you at your expense, UPS Ground.

If our testing confirms that a Product DOES exhibit material or workmanship defect, Dieselogic will replace the item (like for like), and cover UPS Ground shipping to return the replacement Product to the original Customer. You may elect to pay for faster shipping at your expense.

For Warranty Claims and testing consideration, once an RMA number has been issued, you will add your RMA number to the address below and send the Product to:
2345 Harper St.
Jacksonville, FL 32204



Shipping Policy

Domestic Shipping

All orders shipped from are shipped via customer's request when applicable. Free UPS Ground shipping and core return labels are offered to contiguous USA customers only. UPS ground is free on all orders over $100.00. Due to UPS regulations we cannot ship website orders to a PO Box.  Due to FAA regulations flammable liquids (fuel additive) cannot be shipped via air freight; these items must be shipped via UPS ground service.  We make every effort to ship all orders within 48 hours, excluding weekends and National Holidays.

International Shipping

Shipping costs on orders placed outside of the Contiguous US may not have accurate shipping charges assessed at check out; in this case the shipping cost will be calculated and we will contact the customer for confirmation of this charge.  Buyer shall be responsible for all shipping, handling, insurance, customs, duties and import fees, tariffs and taxes, and all other similar costs and charges.  Dieselogic reserves the right to pass any additional shipping expenses incurred from Buyers shipping instructions to the Buyer.  All orders for customers outside of the US for injectors, turbos and pumps; must send us their cores in advance or pay for them in full.  Please contact us at 904.786.7402 or via email at for further information.