Westman Equipment Cummins ISB 6.7L DEF Head Unit
WESTMAN EQUIPMENT 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 5410-18-FC01-7 ( OEM Part Number 3600821 ). 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, 18"
OEM NUMBERS
| Primary OEM | 3600821 |
| Additional OEM | 3600821 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490540583 |
| 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.
Engineered for precision and reliability, the Westman Equipment Cummins ISB 6.7L DEF Head Unit, OEM part number 3600821, is designed to monitor and manage Diesel Exhaust Fluid (DEF) levels, temperature, and quality, ensuring efficient emissions control. Manufactured to OEM specifications, this DEF head unit ensures proper fitment and seamless integration with the engine’s control system. Built from high-quality, corrosion- and chemical-resistant materials, it is durable enough to withstand harsh diesel operating environments. Each unit is rigorously tested for sensor accuracy, electrical functionality, and long-term durability. Ideal for professional diesel technicians and fleet maintenance operations, this OEM DEF head unit supports efficient emissions management and reliable operation for Cummins ISB 6.7L engines used in Westman Equipment.
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The DEF Head Unit OEM 3600821 is an essential component for Cummins ISB 6.7 L engines in Westman Equipment applications. This unit is mounted on the DEF tank and serves as the interface between the tank and the engine’s after-treatment (SCR) system. It plays a critical role in ensuring that Diesel Exhaust Fluid (DEF) is monitored, managed, and delivered efficiently.
What It Does
- Measures DEF Level
- The head unit detects the amount of DEF in the tank and sends this information to the engine control module (ECM), ensuring that the system can alert when DEF levels are low.
- Monitors Fluid Temperature
- It tracks the DEF temperature, alerting the system if the fluid is too cold or too hot, which could affect the fluid’s ability to function correctly.
- Routes the Fluid
- Acting as a header, it provides the path for DEF to be drawn from the tank into the dosing system and includes a return path for unused fluid to maintain proper circulation.
- Filters & Protects
- The head unit houses an internal filter that prevents particles, crystals, and other contaminants from entering the dosing system, ensuring the system remains operational and free from damage.
- Sends Sensor Data
- It transmits real-time data to the ECM about fluid levels, temperature, and possibly other conditions, helping the engine control module adjust dosing, perform diagnostics, and protect the system.
While the DEF head unit may appear as a simple mount for the DEF tank, OEM 3600821 is a vital component that ensures smooth, efficient operation of the SCR system. By accurately monitoring and controlling DEF delivery, it helps maintain emissions compliance, ensures that the engine runs optimally, and protects the system from potential damage.
The DEF (Diesel Exhaust Fluid) Head Unit plays a crucial role in your vehicle’s emissions system. It monitors DEF level, quality, and temperature to ensure your truck remains compliant with emissions standards. Understanding the components of the DEF Head Unit can help you maintain and troubleshoot the system effectively, keeping your vehicle running smoothly and efficiently.
Key Components of a DEF Head Unit
A DEF Head Unit is made up of several precision-engineered components that work together to monitor the DEF system. These components provide real-time data to the Engine Control Module (ECM) to ensure proper fuel combustion and emissions control.
- Level Sensor
- The level sensor is responsible for measuring the amount of DEF fluid in the tank. It sends this data to the ECM to ensure that the fluid level remains within optimal operating conditions. If the level sensor fails or malfunctions, it can lead to inaccurate readings or trigger warning lights, even if the tank is full.
- Temperature Sensor
- The temperature sensor monitors the temperature of the DEF fluid. Since DEF must be maintained within a certain temperature range to function properly, the temperature sensor ensures the system performs optimally, preventing freezing or overheating.
- Quality Sensor (Concentration Sensor)
- The quality sensor measures the concentration of urea in the DEF fluid to ensure it meets the necessary 32.5% concentration standard. If the DEF fluid becomes diluted, contaminated, or otherwise out of specification, the sensor will alert the ECM and may trigger fault codes.
- Heater Element
- The heater element prevents DEF from freezing in colder temperatures. This component activates when temperatures drop below a certain threshold, ensuring that the fluid stays in a usable state and the system continues to operate efficiently.
- Pickup Tube (Suction Tube)
- The pickup tube draws DEF from the tank and delivers it to the pump for further processing. If the pickup tube becomes clogged or damaged, it can cause incorrect readings or a lack of DEF flow, leading to engine performance issues or derate mode.
- Electrical Connector and Wiring Harness
- The wiring harness connects all the sensors and components in the DEF Head Unit to the Engine Control Module (ECM). This electrical system allows data to flow smoothly between the DEF system and the ECM, ensuring proper communication. Any issue with wiring — like corrosion or loose connectors — can lead to errors in data transmission.
- Housing Assembly (Sealed Body)
- The housing of the DEF Head Unit protects the internal sensors and electronics from external contamination, corrosion, and damage. This sealed design is crucial for the proper operation of the unit but also means that the unit cannot be repaired or serviced once damaged.
The DEF Head Unit is made up of several components that work together to monitor and control the DEF system, including sensors for fluid level, temperature, and quality. Maintaining these components and ensuring they are functioning properly helps keep your emissions system running smoothly, prevent failures, and avoid derate mode.
Check and clean all DEF tank and sensor connections, verify wiring is intact, and clear system faults once installed.
Yes — improper DEF dosing or system monitoring can lead to higher NOx emissions or regulatory failures.
Exposure to crystallized DEF fluid, vibration and high temperature cycles can degrade sensor and electronic performance.
At each major service interval or whenever SCR or DEF system warnings appear.
Cummins DEF Head Units
