SANY Cummins ISB 6.7L DEF Head Unit
SANY 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 4310-11-26 ( OEM Part Number 501740 ). 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 | 501740 |
| Additional OEM | 501699, 501740 |
ADDITIONAL DETAILS
| CONDITION | Remanufactured |
| UPC / Barcode | 00840490541108 |
| 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 SANY Cummins ISB 6.7L DEF Head Unit: OEM 501740 provides accurate monitoring and dependable operation of the diesel exhaust fluid system in compatible SANY equipment. Built to OEM specifications, this unit measures DEF level, temperature, and quality to maintain emissions compliance and steady aftertreatment performance. Its rugged construction is designed for long-lasting reliability in demanding work environments, helping protect both the exhaust system and overall engine efficiency. By selecting an OEM DEF head unit, you minimize compatibility concerns and promote consistent, long-term performance. This component is a trusted solution for keeping SANY Cummins-powered machinery operating smoothly and without interruption.
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The DEF Head Unit OEM 501740 is a vital emissions system component used in SANY machinery powered by the Cummins ISB 6.7L engine. This head unit mounts directly onto the DEF (Diesel Exhaust Fluid) tank and performs several essential monitoring and fluid management functions to ensure the Selective Catalytic Reduction (SCR) system operates smoothly and efficiently.
Designed with OEM-quality standards in mind, the unit typically features an 11-inch header body and a built-in 40-micron internal filter for fluid cleanliness. It is often offered in remanufactured form with full compatibility and durability.
Key Functions and Operation
- DEF Level Monitoring
- The unit continuously measures the amount of DEF fluid available in the tank and sends that data to the vehicle’s engine control module. This ensures operators are alerted before the tank runs low, helping to avoid warning lights or engine derate situations.
- Fluid Temperature Sensing
- DEF is sensitive to temperature changes. If it gets too cold, it can freeze and become unusable. This unit includes a sensor that tracks DEF temperature in real time, allowing the system to take action when necessary to keep the fluid within an optimal range.
- Internal Filtration
- The head unit houses a fine 40-micron filter that helps remove debris and impurities from the DEF fluid. This helps prevent clogs and protects downstream components like the DEF injector and SCR catalyst.
- Fluid Routing (Suction and Return)
- The unit manages the suction of DEF from the tank to the dosing system and may also facilitate the return of excess fluid. This flow management is crucial for consistent dosing and proper system pressure.
- Sensor Communication
- All sensor data—including fluid level and temperature—is relayed to the engine control system. This information allows the system to make real-time decisions about DEF dosing and helps detect any abnormal conditions.
The DEF Head Unit OEM 501740 may not be a high-visibility component, but its role is essential. If this unit malfunctions, it can result in system errors, emission failures, and even costly downtime. A properly functioning head unit ensures that the DEF system is delivering clean, temperature-stable fluid to the SCR system, helping your SANY equipment stay compliant, efficient, and reliable.
Regular inspections and timely replacements are the best way to keep your DEF system performing at its best.
The DEF (Diesel Exhaust Fluid) head unit is responsible for monitoring key data inside your DEF tank—like fluid level, temperature, and quality. When this unit goes bad, it can trigger a series of frustrating issues that affect both drivability and emissions control.
Common Symptoms of a Bad DEF Head Unit
Watch for these clear signs that may indicate your DEF head unit is failing:
- False fluid level readings
- The tank appears empty or full when it’s not.
- Repeated DEF system warnings
- Alerts such as “Service DEF System” or “DEF Quality Poor” appear frequently.
- Unexpected derates
- The vehicle limits speed or throttle without a true system issue.
- Check engine or emissions light
- Sensor-related fault codes may be triggered and stored.
- Fluctuating DEF consumption
- You notice DEF being used too quickly—or hardly at all.
- Sensor communication errors
- Diagnostic scans show signal dropouts or inconsistent readings.
If you see more than one of these symptoms, it's important to run a diagnostic scan. If the fluid is clean and wiring is intact, the head unit itself is likely the cause and should be replaced.
It monitors DEF tank level, temperature, and quality in Cummins ISB 6.7L engines.
It provides accurate DEF data so the SCR emissions system operates correctly.
False DEF readings, fault codes, or unexpected derates are common indicators.
Yes, a defective unit can reduce power and cause costly downtime.
Cummins DEF Head Units
