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Wausau Equipment Cummins ISL DEF Head Unit

WAUSAU EQUIPMENT CUMMINS ISL DEF HEAD UNIT

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$895.00

CORE CHARGE:

$250.00
iCORE DISCLAIMER: The CORE charge is a 30 day hold and will not be processed as long as the CORE is returned within 30 days. If you do not have a CORE or fail to return the CORE within 30 days, the CORE charge hold amount will be processed at that time.

AVAILABILITY IN STOCK
OEM NUMBERSV10595
PART TYPEDEF Head Unit
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEISL
YEAR
PART NUMBER4310-22-11
APPLICATION NOTESWausau Equipment
ADDITIONAL NOTESDEF Header, 40 MICRON, 22"

PRODUCT DESCRIPTION

This is a Remanufactured, Tamerx DEF Head Unit, Tamerx part number 4310-22-11 ( OEM Part Number SV10595 ). This part is primarily made for a Cummins ISL, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

Additional Notes: DEF Header, 40 MICRON, 22"

OEM NUMBERS

Primary OEMSV10595
Additional OEMSV10595

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490540897
WEIGHT8.00 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.


Take your emissions control to the next level with the Wausau Equipment Cummins ISL DEF Head Unit (OEM SV10595 / Tamerx 4310-22-11) — engineered for precise, real-time monitoring of DEF level, temperature, and quality in harsh operating environments. Rugged and reliable, this remanufactured unit fits your ISL engine seamlessly and helps prevent derates, maintain compliance, and keep your equipment running clean mile after mile. Backed by Tamerx’s proven 1-million mile / 1-year warranty, it’s a smart investment in performance and peace of mind.

PEOPLE ALSO ASKS | BLOG(S)

In diesel emission control, the devil is often in the details—and one of the small yet essential components is the DEF (Diesel Exhaust Fluid) head. For Wausau Equipment systems employing the Cummins ISL engine, the OEM SV10595 DEF Head Unit plays a pivotal role in maintaining sensor integrity, proper dosing, and smooth SCR operation. When it goes out of spec or fails entirely, your engine control module loses accurate data—and that often spells warning lights, derates, and emissions faults.

  • Monitors DEF fluid level, temperature, and urea concentration, furnishing precise feedback to your ECU

  • Controls correct dosing of DEF into the exhaust stream so the SCR (Selective Catalytic Reduction) system can convert NOx properly

  • Designed to meet OEM SV10595 specifications, ensuring drop-in compatibility with Wausau / Cummins ISL setups

  • Helps prevent system faults, emission warnings, and engine derates triggered by bad or inconsistent sensor signals

  • Built to endure the rigors of heavy-use environments: vibration, thermal cycling, and exposure to DEF’s corrosive nature

  • Engineered for ease of replacement so downtime is minimized

A failing DEF head is rarely conspicuous until it becomes a real headache—and by then, it may trigger faults or shutdowns when you least expect them. Installing the OEM SV10595 Wausau Equipment Cummins ISL DEF Head Unit restores confidence in your emissions system, keeps your SCR performance intact, and safeguards your operation from surprise maintenance issues. Don’t let a little component become your biggest liability.

The DEF (Diesel Exhaust Fluid) head unit is a crucial component of modern diesel emission systems, responsible for monitoring fluid level, quality, and temperature. When it fails or begins to degrade, drivers may face warning lights, fault codes, or even vehicle derates. Understanding what leads to these failures can help operators take preventive measures and extend the lifespan of this vital part.

Common Causes of DEF Head Unit Failure or Degradation

  • Contaminated DEF Fluid
    Dirt, water, or other impurities in the DEF tank can damage sensors and trigger false readings.

  • Crystallization Build-Up
    DEF naturally forms crystals when exposed to air. Over time, buildup around sensors can block accurate monitoring.

  • Extreme Temperatures
    Freezing or overheating conditions can strain or damage internal sensors, reducing accuracy and reliability.

  • Electrical Connector Problems
    Corroded, loose, or damaged wiring can interrupt communication between the head unit and the engine control module (ECM).

  • Normal Wear and Tear
    Like any electronic component, sensors inside the head unit can degrade over years of operation.

  • Improper Handling During Maintenance
    Rough handling, incorrect tools, or neglecting routine inspections may shorten the unit’s service life.

Most DEF head unit failures are preventable with proper care. By using certified DEF fluid, protecting the system from extreme conditions, and including the DEF system in routine maintenance checks, operators can avoid premature degradation and keep their vehicles running smoothly and in compliance.

When maintained properly and using clean DEF, it should last many years before sensor drift or failure becomes a concern.

Erratic level or quality readings, repeated DEF system warnings, and engine derate are common indicators.

Flush it gently with spec-grade DEF, avoid harsh chemicals or solvents, and carefully clean around sensor ports without damaging them.

Drain or isolate the DEF, disconnect wiring and fluid connections, remove the old head, install a new one, prime the system, and run calibration.

Cummins DEF Head Units

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