4946291RX | Genuine Cummins® Single-Cylinder Air Compressor for ISB, ISQ and QSB Engines

SKU: 4946291RX MPN: 4946291RX

Turn consistent air pressure into confident braking with the Genuine Cummins Air Compressor. Condition: new. Part number: 4946291RX. Built to support stable air delivery for ISB, ISQ, and QSB engines used in commercial brake systems.

$1,179.00
No Core Charge
8 in stock, ready to ship

Pickup available at Warehouse - Howard st 7092 ste F

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: 4946291RX

  • Free shipping over $199 Order today — get it
  • Clock Icon
    Orders before 7 PM EST ship same business day
  • Location icon, warehouse pickup point.
    Pickup available. Usually ready in 24 hours

Product Description

Product Name Air Compressor Product Name Air Compressor
Type Single-Cylinder Type Single-Cylinder
Condition New Condition New
Brand Cummins® Brand Cummins®
Part Number 4946291RX Part Number 4946291RX
Cross Reference 4946291 Cross Reference 4946291
Engine Compatibility
Cummins ISB, ISQ Cummins ISB, ISQ
Cummins QSB Cummins QSB
Emission compliance EPA07 Emission compliance EPA07
Specifications
Mounting Flange Mount Mounting Flange Mount
Operating Speed 3000 rpm Operating Speed 3000 rpm
Cooling Method Water Cooling Method Water
Lubrication Supplied from Engine Lubrication Supplied from Engine
Max. operating pressure 145.0 psi Max. operating pressure 145.0 psi
Swept Volume 247 cm³ Swept Volume 247 cm³
Crankshaft Thread M20 × 1.5 Crankshaft Thread M20 × 1.5
Piston Diameter 2.95 in Piston Diameter 2.95 in
Piston Stroke 2.20 in Piston Stroke 2.20 in
Port Thread 0 M27 × 2 Port Thread 0 M27 × 2
Port Thread 2 M27 × 2 Port Thread 2 M27 × 2
Port Thread 4 M10 × 1.0 Port Thread 4 M10 × 1.0
Port Thread 8.1 Ø 0.2 in Port Thread 8.1 Ø 0.2 in
Port Thread 9 / 9.1 / 9.2 3/4"-16 UNF Port Thread 9 / 9.1 / 9.2 3/4"-16 UNF
Overall Size 225 × 178 × 317 mm Overall Size 225 × 178 × 317 mm
Operating Temperature -40°C to +80°C Operating Temperature -40°C to +80°C

Useful Information

Description and Purpose:

Cummins produces this Genuine Air Compressor in new condition, with its identity tied to Part number 4946291RX. Built for EPA07-compliant ISB, ISQ, and QSB diesel engines, it plays a critical role in generating compressed air for braking and auxiliary systems. Its single-cylinder design balances durability and efficiency, making it a dependable component for heavy-duty commercial vehicles. Cross reference: 4946291

Why Replacement is Important:

Insufficient air pressure caused by a failing compressor can compromise braking safety and overall system function.

Impact on Vehicle Performance:

Maintains steady brake air pressure, improves system responsiveness, and supports safe vehicle operation.

Manufacturer Information:

Cummins® applies advanced engineering and rigorous quality standards to provide parts that support stable operation, accurate system integration, and dependable engine reliability.

Tags & Category: Single-Cylinder Air Compressor, Air Brake Compressor, Engine-Driven Air Compressor, Heavy-Duty Air Compressor, Truck Air Brake System, Cummins Air Compressor, Cummins ISB Compressor, Cummins ISQ Compressor, Cummins QSB Compressor, EPA07 Emissions, Commercial Vehicle Brake Air Supply, Diesel Engine Air Compressor, Pneumatic 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.

Customer Reviews

Be the first to write a review
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
  • 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: 4946291RX