3966517 | Genuine Cummins® 1 Cylinder Air Brake Compressor for ISB and B engines

SKU: 3966517 MPN: 3966517

Experience trusted airflow performance from the Genuine Cummins Air Brake Compressor. Part number: 3966517. Condition: new. Engineered for 4B3.9, ISB5.9G CM2180 and 6B5.9 diesel 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 3966517 Part Number 3966517
Cross Reference 3966517RX Cross Reference 3966517RX
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 — Part number: 3966517, in new condition — delivers reliable air pressure for your braking system, keeping your truck’s pneumatic components working smoothly and safely. Designed for demanding diesel engines like 4B3.9 and 6B5.9, it provides consistent airflow to maintain proper brake response, even under heavy load. Its water-cooled, single-cylinder design ensures durability, long service life, and steady performance mile after mile. Cross reference: 3966517RX

Why Replacement is Important:

Replacing a worn or inefficient compressor restores dependable air pressure, preventing brake lag and keeping your vehicle compliant with air system safety standards.

Impact on Vehicle Performance:

Ensures constant air delivery for smooth brake engagement, enhances braking consistency, and helps extend the overall lifespan of your braking components.

Manufacturer Information:

Cummins® designs and engineers durable engine parts built to perform under extreme conditions, providing unmatched efficiency and dependability for commercial and industrial use.

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: 3966517