Perkins Engines Perkins DEF Head Unit
PERKINS ENGINES PERKINS 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 1795-18-2 ( OEM Part Number T434606 ). This part is primarily made for a Perkins , and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
Additional Notes: DEF Header, Helical Heater, 40 MICRON, 18"
OEM NUMBERS
| Primary OEM | T434606 |
| Additional OEM | T431006, T434606 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490541368 |
| 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 specifically for Perkins equipment, the Perkins Engines DEF Head Unit OEM T434606 is designed to keep the Diesel Exhaust Fluid system functioning as intended. This genuine OEM component is manufactured to precise factory standards, ensuring proper fitment and dependable performance in demanding applications. By supporting emissions compliance, it helps maintain smooth and consistent engine operation across Perkins-powered machinery. Its rugged construction is engineered for durability, delivering reliable service life in heavy-duty environments. For operators seeking a trusted replacement, this DEF head unit provides OEM-backed quality and lasting reliability.
PEOPLE ALSO ASKS | BLOG(S)
The Perkins DEF Head Unit OEM T434606 is a critical part of the emissions system, designed to manage and monitor Diesel Exhaust Fluid (DEF) inside the tank. By combining sensors, heating elements, and fluid pathways into a single unit, it ensures Perkins engines operate efficiently while staying compliant with environmental standards.
Key Components
- Housing / Manifold Body
- The main structure that mounts securely to the DEF tank and contains all internal elements.
- DEF Level Sensor
- Detects how much DEF is in the tank and communicates fluid status to the control system.
- Temperature Sensors
- Track DEF temperature to prevent freezing or overheating.
- Heating Circuit / Helical Heater
- Integrated heating system or coolant interface that keeps DEF in usable liquid form during cold conditions.
- Pickup Port
- Draws DEF from the tank for delivery to the dosing system.
- Return Port
- Sends unused DEF back into the tank for circulation and balance.
- Internal Filter / Strainer
- Fine filter that prevents contaminants or crystals from reaching the injection system.
- Electrical Connector & Circuitry
- Provides communication between the sensors and the engine control module (ECM).
- Seals and Gaskets
- Ensure leak-free operation and durability under vibration and temperature changes.
Each of these components works together to ensure reliable DEF supply, accurate monitoring, and proper system protection. The OEM T434606 DEF Head Unit safeguards the SCR system and keeps Perkins engines running clean and compliant.
The DEF (Diesel Exhaust Fluid) head unit is a key component in your vehicle’s emissions system. It measures DEF level, quality, and temperature to ensure compliance with environmental regulations. Like any part, it has a limited lifespan.
Average Lifespan of a DEF Head Unit
Most DEF head units last between 5 and 7 years under normal driving conditions. Some may last longer with proper care, while others fail sooner if exposed to contamination or harsh environments.
Factors That Affect Longevity:
- Quality of DEF fluid
- Using certified DEF prevents sensor damage
- Storage and handling
- Contaminated containers can introduce dirt and debris
- Operating environment
- Extreme heat or freezing puts added stress on the unit
- Maintenance practices
- Regular inspections help detect issues early
- Driving conditions
- Heavy-duty cycles may shorten lifespan
How to Extend the Life of a DEF Head Unit
You can maximize longevity by:
- Always using clean, certified DEF fluid
- Storing DEF in sealed, temperature-controlled containers
- Protecting the tank from extreme weather
- Scheduling regular system inspections
A DEF head unit typically lasts several years, but its lifespan depends on how well the system is maintained. Good DEF handling and preventive care are the best ways to avoid early failures.
It supplies accurate DEF data to the ECM to keep emissions controls operating correctly.
Yes, if it fails, the system may limit engine output until the unit is replaced.
Yes, it is engineered for use only with Perkins applications requiring DEF.
It sends DEF fluid level, temperature, and quality readings from the tank.
