
Bobcat / Doosan D34 DM03 Doser DEF Pump 2020-2024: OEM 7344741
BOBCAT / DOOSAN D34 DM03 DOSER DEF PUMP 2020-2024: OEM 7344741

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY
1M MILES OR 1 YEAR
PRODUCT DESCRIPTION
This is a New, Tamerx Doser DEF Pump, Tamerx part number 7344741 ( OEM Part Number 7344741 ).This part is primarily made for a Bobcat / Doosan D34 DM03, production years 2020-2024, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here
OEM NUMBERS
| Primary OEM | 7344741 |
| Additional OEM | 7344741 |
ADDITIONAL DETAILS
| CONDITION | New |
| UPC / Barcode | 00840490534155 |
| WEIGHT | 6.00 LBS |
SHIPPING OPTIONS
Ship Weight : 6.00 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 for Bobcat and Doosan D34 DM03 engines from model years 2020–2024, OEM 7344741 is a DEF (Diesel Exhaust Fluid) doser pump designed to deliver precise dosing of DEF into the exhaust aftertreatment system. This component is manufactured to OEM specifications to ensure proper fitment and compatibility with factory SCR assemblies. Constructed from durable materials, it is suited for the operating conditions common in modern diesel applications. The doser pump supports accurate DEF delivery to aid in emissions control functions. It is a dependable option for fleet maintenance and targeted repair needs requiring reliable aftertreatment system performance.
FITMENT CHART
| YEAR | MAKE | ENGINE(S) | ||||
|---|---|---|---|---|---|---|
| 2020 | Bobcat / Doosan | D34 DM03 | ||||
| 2021 | Bobcat / Doosan | D34 DM03 | ||||
| 2022 | Bobcat / Doosan | D34 DM03 | ||||
| 2023 | Bobcat / Doosan | D34 DM03 | ||||
| 2024 | Bobcat / Doosan | D34 DM03 | ||||
PEOPLE ALSO ASKS | BLOG(S)
The Bobcat / Doosan D34 DM03 Doser DEF Pump 2020–2024: OEM 7344741 works as part of the engine’s Selective Catalytic Reduction (SCR) system, which is designed to reduce nitrogen oxide emissions in diesel-powered equipment. This component is responsible for delivering Diesel Exhaust Fluid (DEF) from the tank to the exhaust system in a controlled and precise manner.
The DEF pump draws fluid from the DEF tank and pressurizes it to the correct level required by the dosing system. Once pressurized, the DEF is sent through supply lines to the doser injector, where it is sprayed into the exhaust stream upstream of the SCR catalyst.
Here’s how the process works step by step:
- The pump pulls DEF from the storage tank
- It pressurizes the fluid to meet system requirements
- The engine control module regulates pump operation
- DEF is delivered to the dosing valve for injection into the exhaust
When injected into hot exhaust gases, DEF breaks down into ammonia. Inside the SCR catalyst, this ammonia reacts with nitrogen oxide emissions and converts them into nitrogen and water vapor before exiting the exhaust system.
Designed for 2020–2024 Bobcat and Doosan D34 DM03 applications, OEM 7344741 ensures accurate DEF delivery, which is critical for maintaining emissions compliance. A properly functioning DEF pump helps prevent warning lights, derates, and emissions-related downtime in equipment operating under regulated standards.
You should replace your DEF doser pump when diagnostics confirm it can no longer maintain proper pressure, flow, or dosing performance. The DEF pump plays a critical role in supplying pressurized Diesel Exhaust Fluid to the dosing injector, and failure can quickly lead to SCR efficiency faults, engine derates, and emissions non-compliance.
Replacement becomes necessary after verifying that DEF quality is good and the system is free from contamination. Many DEF pump issues are actually caused by crystallization, clogged lines, wiring faults, or poor electrical connections rather than internal pump failure.
Midway through diagnosis, the following conditions typically indicate DEF doser pump replacement is required:
- Persistent low DEF pressure or delivery fault codes
- Inability to build or hold commanded system pressure
- Failed DEF pump self-test or prime cycle
- Repeated SCR efficiency codes linked to dosing failure
- Internal pump leakage or visible DEF crystallization damage
- Electrical failure of the pump motor or control module
Before installing a new pump, it is critical to flush the DEF tank and lines if contamination or crystallization is present. Failing to clean the system can quickly damage the replacement unit.
In most cases, the DEF doser pump should only be replaced after confirming pressure loss, electrical failure, or internal mechanical damage. Proper diagnostics and system cleaning are essential to prevent repeat failures and ensure reliable SCR operation.
Compact loaders, excavators, and other Bobcat or Doosan machines equipped with D34/DM03 engines use this DEF pump.
Yes, a diagnostic scan is typically recommended to confirm correct communication with the DEF and engine control systems.
Yes, professional installation is recommended due to its integration with the DEF lines and sensing components.
It is the diesel exhaust fluid doser pump that delivers measured DEF to the aftertreatment system on D34/DM03 engines.






