Gremo Cummins ISB 6.7L DEF Head Unit
GREMO CUMMINS ISB 6.7L DEF HEAD UNIT
ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY
WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a Remanufactured, Tamerx DEF Head Unit, Tamerx part number 4310-22-5 ( OEM Part Number 614792 ). This part is primarily made for a Cummins ISB 6.7L, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
Additional Notes: DEF Header, 40 MICRON, 22"
OEM NUMBERS
| Primary OEM | 614792 |
| Additional OEM | 614792 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490540811 |
| WEIGHT | 8.00 LBS |
SHIPPING OPTIONS
Ship Weight : 8.00 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.
Maintain reliable DEF system performance with the Gremo Cummins ISB 6.7L DEF Head Unit (OEM 614792). This genuine OEM component is engineered to monitor diesel exhaust fluid levels, temperature, and quality, ensuring proper operation of the emissions control system. Designed to meet Cummins and Gremo specifications, it provides accurate communication with the engine’s aftertreatment system for efficient and compliant performance. Its rugged, weather-resistant construction delivers durability and reliability in demanding working environments. Choose Tamerx Diesel Products LLC for authentic DEF system replacement parts that keep your Cummins ISB 6.7L-powered equipment operating efficiently and within emissions standards.
PEOPLE ALSO ASKS | BLOG(S)
The Gremo Cummins ISB 6.7L DEF Head Unit (OEM 614792) is a key component of the Diesel Exhaust Fluid (DEF) system, designed specifically for Gremo machinery powered by Cummins ISB 6.7L engines. This unit manages the flow, monitoring, and communication of DEF fluid that supports the engine’s emissions control system.
Key Roles and Responsibilities
- Monitors DEF Levels and Conditions
- Built-in sensors track the DEF level, temperature, and sometimes fluid quality to ensure accurate readings.
- Integrates Fluid Routing and Filtration
- Includes a header assembly with fine filtration (commonly 40 microns) to keep DEF clean and prevent contamination.
- Provides System Communication
- Connects to the engine’s control module to relay critical data about fluid status and operating conditions.
- Ensures Proper SCR Function
- Maintains steady DEF supply to the Selective Catalytic Reduction (SCR) system, enabling proper emissions control.
- Designed for Direct Fit
- Engineered to meet OEM 614792 specifications for perfect compatibility with Gremo equipment and Cummins ISB 6.7L engines.
Using the correct DEF Head Unit ensures your engine’s after-treatment system operates smoothly and within emissions standards. A faulty or incompatible unit can cause inaccurate sensor readings, emission faults, or even derate conditions. The Gremo Cummins ISB 6.7L DEF Head Unit (OEM 614792) plays a vital role in keeping your equipment efficient, compliant, and dependable.
The Diesel Exhaust Fluid (DEF) head unit is a vital part of your vehicle’s emissions system, responsible for monitoring DEF level, temperature, and quality. When it fails, you may experience warning lights, inaccurate DEF readings, or reduced engine function. While it might seem tempting to replace it yourself, doing so isn’t always simple.
Technically, it is possible to replace a DEF head unit on your own, but it requires mechanical skill, specialized tools, and access to diagnostic equipment to clear system fault codes after installation. The unit is often integrated with sensors and wiring that must be connected precisely to function correctly.
Before attempting replacement, consider the following:
- The DEF system operates under strict emission controls — mistakes can trigger fault codes or derate mode.
- Incorrect installation may cause leaks or electrical issues.
- You may need to reprogram or reset the ECM using professional diagnostic software.
- Most manufacturers recommend professional service to ensure compliance and warranty protection.
If you’re experienced with diesel repair, DIY replacement is possible. However, for most drivers, having a certified technician handle the job ensures correct installation, avoids downtime, and keeps your emissions system operating as designed.
Blocked ports can lead to inaccurate level readings, restricted DEF flow, or false low-fluid warnings that may trigger derate.
They can check sensor voltages and continuity with a diagnostic tool; inconsistent readings or open circuits often point to wiring faults.
Yes — poor fluid quality can crystallize on the sensor elements, interfering with accurate measurement and eventually damaging internal components.
Extreme temperature swings, vibration, and dust or debris exposure around the DEF tank can accelerate wear or sensor degradation.
Cummins DEF Head Units
