4946294 | Genuine Cummins® 1 Cylinder Air Brake Compressor for ISB and B engines

SKU: 4946294 MPN: 4946294

Keep your air system performing flawlessly with the Genuine Cummins 1-Cylinder Air Brake Compressor. Part number: 4946294. Condition: new. Designed for 4B3.9, 6B5.9, and ISB5.9G engines.

$1,499.00
No Core Charge
3 in stock

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Product Description

Product Name Air Brake Compressor Product Name Air Brake Compressor
Type Single Cylinder Type Single Cylinder
Condition New Condition New
Brand Cummins® Brand Cummins®
Part Number 4946294 Part Number 4946294
Cross Reference 4946294RX Cross Reference 4946294RX
Specifications
Calculated Volume (dm³) 10.13 Calculated Volume (dm³) 10.13
Swept volume (cm³) 247 cm3 Swept volume (cm³) 247 cm3
Cooling Water Cooling Water
Crankshaft thread M20 x 1.5 Crankshaft thread M20 x 1.5
Lubrication Lubrication supplied from engine Lubrication Lubrication supplied from engine
Max. operating pressure 145.0 psi Max. operating pressure 145.0 psi
Mounting Mounting Flange Mounting Mounting Flange
Operating speed 3000 (1/min) Operating speed 3000 (1/min)
Piston diameter 2.95 in Piston diameter 2.95 in
Piston stroke 2.20 in Piston stroke 2.20 in
Port thread 0 0.98 in Port thread 0 0.98 in
Port thread 2 M27 x 2 Port thread 2 M27 x 2
Port thread 4 M10 x 1.0 Port thread 4 M10 x 1.0
Port thread 8.1 M10 x 1 Port thread 8.1 M10 x 1
Port thread 9 3/4" - 16 UNF Port thread 9 3/4" - 16 UNF
Port thread 9.1 3/4" - 16 UNF Port thread 9.1 3/4" - 16 UNF
Port thread 9.2 3/4" - 16 UNF Port thread 9.2 3/4" - 16 UNF
Temperature range -40°C to +80°C Temperature range -40°C to +80°C
Engine Compatibility
Cummins 4B3.9, 6B5.9, B5.9 G, B5.9 Gas Plus CM556 Cummins 4B3.9, 6B5.9, B5.9 G, B5.9 Gas Plus CM556
Cummins ISB5.9G CM2180 Cummins ISB5.9G CM2180
Emission Compliance EPA02 Emission Compliance EPA02

Useful Information

Description and Purpose:

This Genuine Cummins 1 Cylinder Air Brake Compressor, carrying Part number: 4946294 and offered in new condition, is the heart of your engine’s air supply system. It delivers the compressed air that powers your vehicle’s braking system, ensuring steady, responsive air pressure for every stop. Built for dependable operation in heavy-duty environments, this single-cylinder, water-cooled unit integrates seamlessly with Cummins engines like 4B3.9, 6B5.9, and ISB5.9G. Cross reference: 4946294RX

Why Replacement is Important:

A failing compressor can lead to weak or inconsistent brake performance. Replacing it ensures your air system maintains the pressure needed for safe, reliable braking under all load conditions.

Impact on Vehicle Performance:

Restores optimal air delivery, stabilizes braking response, and supports consistent pneumatic performance across your entire braking system.

Manufacturer Information:

Cummins® is a global leader in diesel engine technology, delivering precision-built components that ensure optimal performance and long-term reliability in heavy-duty applications.

Tags & Category: Air Brake Compressor, Single Cylinder Compressor, Cummins Air System, 4B3.9, 6B5.9, B5.9G, B5.9 GAS PLUS CM556, ISB5.9G CM2180, EPA02, Diesel Engine Air Supply, Heavy-Duty Brake Component, OEM Cummins Compressor, Engine-Mounted Compressor, Pneumatic Brake System

Warranty:

Parts Finder Q offers a 365-days warranty for all types of parts in any condition. The warranty applies exclusively to purchases made directly through our website (partsfinderq.com). Please note that purchases made through third-party platforms like eBay or Amazon are not covered by this warranty.

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  • Icon Truck, Fast Delivery
    Free shipping over $199 Place an order today and receive it on Mar 6
  • Clock Icon
    Orders placed before 7-PM EST will ship same business day
  • Location icon, warehouse pickup point.
    Pickup available usually ready in 24 hours
  • Need it fast? We offer overnight shipping

    Contact us to check if overnight next-day delivery is available for your order - PN: 4946294