Liugong Construction Machinery Cummins ISB 6.7L DEF Head Unit
LIUGONG CONSTRUCTION MACHINERY 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 4310-18-29 ( OEM Part Number 853030189 ). 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 | 853030189 |
| Additional OEM | 60C3325, 853030184, 853030189, SP199819 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490541412 |
| 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.
The Liugong Construction Machinery Cummins ISB 6.7L DEF Head Unit OEM 853030189 is a genuine factory component designed to ensure proper Diesel Exhaust Fluid system function in Cummins-powered Liugong equipment. Built to OEM specifications, it delivers precise fitment and dependable performance in demanding construction applications. By maintaining DEF system reliability, this unit helps support emissions compliance and smooth engine operation in heavy-duty environments. Its rugged construction is engineered to withstand the harsh conditions of daily construction use, offering long-lasting durability. For operators and fleets, this DEF head unit provides OEM-certified quality and trusted service life.
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The Liugong Construction Machinery Cummins ISB 6.7L DEF Head Unit OEM 853030189 is a multifunctional component designed to keep the emissions system running smoothly. Mounted on the DEF (Diesel Exhaust Fluid) tank, it combines several sensors and fluid pathways into one assembly, making it a key link between the fluid supply and the engine’s control system.
Key Components
- Housing / Header Body
- Provides the structure that seals to the DEF tank and supports all internal parts.
- DEF Level Sensor
- Monitors the amount of DEF in the tank and relays this information to the engine control module (ECM).
- Temperature Sensor
- Detects DEF temperature to ensure fluid remains within usable conditions.
- Heating Circuit
- Helps prevent freezing by warming the fluid in colder climates.
- Pickup Port
- Draws DEF from the tank and delivers it to the dosing system.
- Return Port
- Sends unused fluid back into the tank to maintain circulation.
- Filter / Strainer
- Protects the system from impurities and crystal build-up that could damage sensitive parts.
- Electrical Connector
- Transfers data from sensors to the ECM for real-time monitoring.
- Seals and Gaskets
- Maintain a leak-free, durable connection under harsh operating conditions.
By combining monitoring, heating, filtration, and communication in one compact unit, the DEF Head Unit OEM 853030189 ensures reliable operation of Liugong machinery and long-term compliance with emissions regulations.
The DEF (Diesel Exhaust Fluid) head unit is a critical component that monitors fluid level, temperature, and quality in your truck’s emissions system. Like any part, it can fail over time — but many failures are preventable if you understand the causes.
Main Causes of DEF Head Unit Failure
Several factors can cause the unit to go bad sooner than expected:
- Contaminated DEF fluid
- Dirt, dust, or debris introduced during refills
- Poor handling or storage
- Using containers not designed for DEF introduces impurities
- Extreme temperatures
- Heat can degrade sensors, while freezing causes crystallization
- Expired or uncertified DEF
- Low-quality fluid damages sensitive components
- Moisture intrusion
- Water or condensation entering the tank disrupts electronics
- Age and wear
- Normal breakdown after years of service
How to Prevent Early Failure
You can extend the life of your DEF head unit with a few simple steps:
- Always use fresh, certified DEF
- Keep storage containers sealed and clean
- Protect the DEF tank from direct heat or freezing conditions
- Inspect the system regularly for buildup or damage
A DEF head unit usually goes bad due to contamination, poor fluid quality, or environmental stress. Proper handling and preventive care are the best ways to avoid early failure and costly downtime.
It provides the ECM with accurate DEF data to keep the emissions system operating properly.
Yes, a defective unit can trigger fault codes that reduce or stop machine operation.
They use diagnostic scans to check error codes and validate sensor signals.
Delays may lead to false DEF readings, emissions faults, and costly downtime.
Cummins DEF Head Units
