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 4310-11-22 ( OEM Part Number SP161165 ). 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, 11"
OEM NUMBERS
| Primary OEM | SP161165 |
| Additional OEM | SP161165 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490541023 |
| 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.
Reliable DEF system management is delivered by the Liugong Construction Machinery Cummins ISB 6.7L DEF Head Unit: OEM SP161165, a direct-fit replacement for compatible Liugong equipment. Manufactured to OEM standards, this unit monitors diesel exhaust fluid level, temperature, and quality to maintain emissions compliance and consistent aftertreatment function. Its durable construction withstands demanding operating conditions, helping protect both the exhaust system and overall engine efficiency. By selecting an OEM DEF head unit, you reduce compatibility concerns and ensure long-term reliability. This component is a proven solution for keeping Liugong Cummins-powered machinery running smoothly and without interruption.
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The DEF Head Unit OEM SP161165 is a critical component installed on Liugong construction machinery powered by Cummins ISB 6.7L engines. Mounted on the DEF (Diesel Exhaust Fluid) tank, this unit performs multiple tasks—monitoring fluid levels, managing temperatures, filtering contaminants, and regulating DEF flow to ensure optimal emissions control through the SCR (Selective Catalytic Reduction) system.
It typically features a compact 11-inch header body and an internal 40-micron filter, and it's often available in both OEM and remanufactured options.
How It Works
- Fluid Level Monitoring
- The head unit tracks how much DEF fluid is available in the tank and sends that data to the vehicle’s control system. This ensures the operator is notified before the tank runs dry, which is essential for uninterrupted emissions control.
- Temperature Sensing
- DEF can freeze or lose effectiveness in extreme cold. The built-in sensor continuously monitors fluid temperature, allowing the control system to activate heating or issue alerts if needed.
- Filtration
- To protect downstream components like injectors and sensors, the unit includes an internal 40-micron filter. It captures particulates and prevents contamination from compromising the SCR system.
- Fluid Routing (Suction and Return)
- The unit manages both the suction of DEF from the tank and the return of unused fluid. This helps maintain consistent flow, proper pressure, and prevents air pockets that could disrupt operation.
A fully functioning DEF Head Unit is essential for keeping your machine compliant with emissions standards and running smoothly. If it fails, you could experience DEF system faults, engine derate, or damage to costly components like the DEF injector or SCR catalyst.
Regular inspection and timely replacement of this unit can save you from unnecessary downtime and expensive repairs.
The DEF (Diesel Exhaust Fluid) head unit plays a key role in your diesel engine’s emissions system. It monitors fluid level, temperature, and quality. When it starts to fail, the vehicle may display unusual behavior—even when the tank and fluid are fine.
Common Signs of a Failing DEF Head Unit
If your DEF head unit is going bad, you might notice:
- Dashboard errors
- Messages like “DEF Quality Issue” or “Service DEF System” may appear without cause.
- Wrong DEF level display
- The gauge may read empty when the tank is full, or fluctuate for no reason.
- Reduced speed or response
- Derate mode may activate, limiting how the engine operates.
- Inconsistent DEF use
- The system may start using more or less fluid than normal.
- Check engine light
- Codes may indicate DEF sensor or communication errors.
Start by checking fluid levels and running a diagnostic scan. Inspect wiring for damage or corrosion. If the readings still don’t make sense, it’s likely time to replace the DEF head unit.
It measures DEF tank level, temperature, and quality in Cummins ISB 6.7L engines.
Yes, a failed unit can trigger derates that reduce machine productivity.
Continued use can lead to emissions faults, downtime, and compliance issues.
No, it must be replaced with a new OEM unit once it fails.
Cummins DEF Head Units
