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Cummins QSK50 Air Compressor 2016-2021: OEM 3647366

CUMMINS QSK50 AIR COMPRESSOR 2016-2021: OEM 3647366

Shipping ICON

ORDERS PLACED BEFORE 3PM EST WILL SHIP SAME DAY

WARRANTY ICON

WARRANTY
1M MILES OR 1 YEAR

$8,550.00

CORE CHARGE:

$2,000.00
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 NUMBER3647366
PART TYPEAir Compressor
BRANDTamerx Diesel Products
ENGINE MAKECummins
ENGINE TYPEQSK50
YEAR2016-2021
PART NUMBER3647366RM

PRODUCT DESCRIPTION

This is a Remanufactured Tamerx Air Compressor, Tamerx part number 3647366RM ( OEM Part Number 3647366 ). All parts are proudly remanufactured in the U.S.A. to the highest of OEM standards, and improvements are often applied to the original design in the remanufacturing process. This part is primarily made for a Cummins QSK50, production years 2016-2021, and comes with a One Million Miles or One Year Warranty. For additional warranty info Click Here

OEM NUMBERS

Primary OEM3647366
Additional OEM3647366

ADDITIONAL DETAILS

CONDITIONRemanufactured
UPC / Barcode00840490542471
WEIGHT77.00 LBS

SHIPPING OPTIONS

Ship Weight : 77.00 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.


Revive your air system with the Cummins QSK50 Air Compressor (2016–2021) – OEM 3647366 — precision-engineered to deliver powerful, consistent airflow for braking, tools, and auxiliary systems. Built to OEM specifications, this rugged compressor handles the demands of heavy-duty duty cycles and ensures your system stays responsive when it matters most. Drop it in and restore the force behind your fleet’s pneumatic performance.

FITMENT CHART

YEARMAKEENGINE(S)
2016Cummins QSK50
2017Cummins QSK50
2018Cummins QSK50
2019Cummins QSK50
2020Cummins QSK50
2021Cummins QSK50

PEOPLE ALSO ASKS | BLOG(S)

When your engine is a high-output platform like the Cummins QSK50, reliable air supply isn’t optional — it’s essential. The OEM 3647366 air compressor serves as a critical support component, supplying compressed air for your brake system, control pneumatics, and other auxiliary functions. If the air compressor falters or fails, even a powerhouse engine like the QSK50 becomes vulnerable to safety, control, or operational faults.

  • Generates compressed air necessary for brake systems, control actuators, and pneumatic systems

  • Maintains consistent pressure and flow under varying engine loads and rpm

  • Built to Cummins’ original specs for the QSK50, ensuring proper fit, durability, and reliability

  • Helps prevent issues such as slow air build time, pressure loss at idle, or unsafe brake response

  • Constructed to endure heat, vibration, and continuous cycling in heavy duty use

With such a critical role in safety and control systems, it’s not a component to shortcut. Installing the correct OEM 3647366 air compressor ensures your QSK50’s auxiliary systems stay powered, dependable, and ready — even when the engine is under full strain. Keep your air system strong so your engine can perform without worry.

The air brake compressor is the heart of a heavy-duty truck’s braking system, supplying the compressed air that makes safe braking possible. Like any mechanical component, it requires regular servicing to maintain efficiency and prevent breakdowns. Understanding how often to service the compressor ensures reliable performance and long-term safety on the road.

Service Guidelines for Air Brake Compressors

  • Routine Inspections
    Inspect the air compressor during every scheduled maintenance interval to check for leaks, unusual noises, or oil carryover.

  • Manufacturer Recommendations
    Most manufacturers suggest servicing the compressor every 3 to 6 months, depending on mileage and operating conditions.

  • Heavy-Duty Applications
    Vehicles used in severe environments or long-haul operations may require more frequent checks, sometimes every 25,000 miles.

  • Air Dryer and Filter Maintenance
    Replace filters and service the air dryer regularly to prevent moisture and contaminants from reaching the compressor and braking system.

  • When Symptoms Appear
    If you notice slow air build-up, oil leaks, or pressure irregularities, the compressor should be inspected immediately, regardless of schedule.

An air brake compressor should be serviced at least twice a year—or more often under heavy-duty conditions. Following the manufacturer’s maintenance schedule, inspecting regularly, and addressing issues early are the best ways to keep the compressor efficient and your braking system safe.

You can measure flow and pressure rates or use diagnostic tools to monitor output against specifications.

Yes — extreme heat or cold can affect its efficiency, sealing, or startup behavior.

Leaks reduce net output pressure and may force the compressor to run longer or harder.

Yes — excessive vibration can loosen bolts, injure seals, or misalign internal parts.

Cummins Air Compressors

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