Lodal Cummins ISB 6.7L DEF Head Unit
LODAL 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 4310-18-10 ( OEM Part Number 3600932 ). 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 | 3600932 |
| Additional OEM | 3600884, 3600932 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490540439 |
| 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.
Built to meet the demands of modern emissions systems, the Lodal Cummins ISB 6.7L DEF Head Unit OEM 3600932 provides dependable Diesel Exhaust Fluid management for Cummins-powered Lodal trucks. This OEM component delivers precise readings and consistent DEF flow, ensuring proper system performance and compliance with emissions regulations. Manufactured to factory specifications, it offers reliable fitment and seamless integration within heavy-duty vehicle applications. Its robust construction is designed to endure the tough operating conditions of refuse and municipal service work, delivering long-lasting dependability. For maintenance teams and fleet operators, this DEF head unit represents OEM-grade quality and the reliability required to keep trucks operating efficiently.
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The Lodal Cummins ISB 6.7L DEF Head Unit OEM 3600932 is an essential part of the Selective Catalytic Reduction (SCR) system that helps reduce harmful emissions. Mounted on the Diesel Exhaust Fluid (DEF) tank, this unit combines multiple sensors, ports, and filters into one integrated design. Together, these components ensure accurate monitoring, steady fluid flow, and protection for the entire DEF system.
Main Components
- Housing Assembly
- The main body of the unit that mounts securely to the DEF tank and supports all internal components.
- Level Sensor
- Monitors how much DEF is in the tank and transmits data to the engine control module (ECM) to alert operators when fluid levels are low.
- Temperature Sensor
- Measures DEF temperature to detect freezing or overheating, allowing the system to respond appropriately.
- Pickup Tube
- Draws DEF from the tank and supplies it to the dosing system for emission treatment.
- Return Line Port
- Sends unused DEF back into the tank, maintaining circulation and system balance.
- Internal Filter
- Removes impurities, crystals, and debris before the DEF enters the dosing system, protecting downstream components.
- Electrical Connector
- Transmits sensor signals to the ECM, enabling precise DEF management and diagnostics.
- Seals and O-Rings
- Ensure the head unit remains leak-free under pressure and temperature changes.
The DEF Head Unit OEM 3600932 is the command center of the DEF tank. By combining monitoring, filtering, and communication functions, it keeps the SCR system clean, efficient, and compliant—ensuring the Cummins ISB 6.7L engine runs smoothly while meeting emissions standards.
The DEF (Diesel Exhaust Fluid) Head Unit plays a vital role in your vehicle’s emissions system. It monitors DEF level, temperature, and quality — sending critical data to the engine control module (ECM). When it starts to fail, your truck may display warning lights or even enter derate mode. Knowing how to diagnose a bad DEF Head Unit can save you time, money, and unexpected downtime.
Common Symptoms of a Bad DEF Head Unit
Watch for these signs that your DEF Head Unit may be failing:
- Incorrect DEF level readings (e.g., showing “empty” when the tank is full)
- Check engine light or emissions warning light
- DEF system fault codes on your dashboard
- Premature derate countdowns, limiting speed or mileage
- Inconsistent or fluctuating DEF sensor readings
Step-by-Step: How to Diagnose the Issue
- Inspect the DEF tank.
- Look for contamination, crystallization, or debris that can interfere with sensor accuracy.
- Check electrical connections.
- Corrosion, loose pins, or damaged wires can mimic a sensor failure.
- Run a diagnostic scan.
- Use a scan tool to check for common DEF-related fault codes (like P203B, P207F, or P205B).
- Compare readings.
- If the tank is full but the ECM shows empty, or if temperature or quality readings fluctuate wildly, the Head Unit may be failing.
- Test continuity and voltage.
- Ensure the Head Unit is receiving power and sending signal output to the ECM correctly.
When to Replace the DEF Head Unit
If diagnostic results confirm that the unit is faulty, replacement is the only reliable solution. The DEF Head Unit is a sealed component — it cannot be cleaned, recalibrated, or repaired once damaged.
Diagnosing a bad DEF Head Unit involves checking for contamination, inspecting electrical connections, and scanning for fault codes. If readings remain inconsistent after testing, replacement is the safest and most effective fix to restore emissions system performance and prevent costly downtime.
Yes, voltage spikes or shorts in the wiring harness can disrupt sensor communication.
Cleaning is not recommended because internal sensors are sealed and cannot be serviced.
Use only certified DEF and keep the DEF tank and fill ports clean during servicing.
With proper maintenance and clean DEF usage, it typically lasts several years of consistent operation.
Cummins DEF Head Units
