3687343 | Genuine Cummins® Air Brake Compressor

SKU: 3687343 MPN: 3687343

Ensure the braking system of your commercial truck is functioning correctly with this new Cummins® Single cylinder air brake compressor. This heavy-duty truck component, part number 3687343, features water cooling and a max pressure of 145.0 psi. It's a direct replacement for QSX15, QSB, ISB, ISX engines, meeting OEM quality standards.

$1,299.00
No Core Charge
3 in stock

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Product Description

Product Name: Single Cylinder Air Brake Compressor Product Name: Single Cylinder Air Brake Compressor
Condition: New Condition: New
Brand: Cummins® Brand: Cummins®
Part Number: 3687343 Part Number: 3687343
Type: Single Cylinder Type: Single Cylinder
Suitable foe Engine:
Cummins QSX15 QSB ISB ISX Cummins QSX15 QSB ISB ISX
Specifications:
Cooling: Water Cooling: Water
Lubrication Lubrication Supplied from Engine Lubrication Lubrication Supplied from Engine
Mounting Mounting Flange Mounting Mounting Flange
Crankshaft Thread M20 x 1.5 Crankshaft Thread M20 x 1.5
Operating Speed 3000 (1/min) Operating Speed 3000 (1/min)
Max. Operating Pressure 145.0 psi Max. Operating Pressure 145.0 psi
Piston Diameter 3.35 in Piston Diameter 3.35 in
Piston Stroke 2.20 in Piston Stroke 2.20 in
Swept Volume 318 cm³ Swept Volume 318 cm³
Calculated Volume 13.98 dm³ Calculated Volume 13.98 dm³
Port Thread 0 0.81 in Port Thread 0 0.81 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 Ø 0.32 in Port Thread 8.1 Ø 0.32 in
Port Thread 9 M18 x 1.5 Port Thread 9 M18 x 1.5
Port Thread 9.1 M18 x 1.5 Port Thread 9.1 M18 x 1.5
Port Thread 9.2 M18 x 1.5 Port Thread 9.2 M18 x 1.5
Temperature Range -30°C to +90°C Temperature Range -30°C to +90°C

Useful Information

Description and Purpose:

The Single Cylinder Air Brake Compressor by Cummins® (Part Number: 3687343) is a genuine OEM replacement designed to deliver dependable air supply for vehicle brake systems. Built for QSX15, QSB, ISB, and ISX engines, this unit features water cooling, engine-supplied lubrication, and robust construction. It comes as a full assembly, ensuring a direct fit and consistent performance.

Why Replacement is Important:

Air brake systems rely on stable pressure—replacing a worn compressor with this OEM-equivalent part helps avoid failures that can lead to reduced braking efficiency. A direct replacement ensures proper function without modifications, restoring the system to its original operational standard.

Impact on Vehicle Performance:

A properly functioning air compressor is essential for maintaining braking power, especially under load. This exact-match part delivers consistent air output and supports optimal braking response, ensuring vehicle safety and reducing the risk of air system failure.

Manufacturer Information:

Cummins® is a globally recognized manufacturer of heavy-duty engine components and systems. With a strong focus on quality and OEM compliance, Cummins delivers reliable replacement parts that integrate seamlessly with original vehicle systems, making them a trusted choice for commercial fleets and industrial use.

Tags Category: Air Brake Compressor, Compressor, Brake System, Pneumatic System, Air System, Air Compression, Pneumatic Component, Compressed Air, Air Brake System Component, Single Cylinder

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: 3687343