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3948842 S1 Cylinder Head for Cummins Air Brake Compressors
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3948842 S1 Cummins Compatible Cylinder Head

25 08 11

Summary

This compressor cylinder head is a high-strength component designed for heavy commercial vehicle air brake systems. It is compatible with Cummins systems, ensuring precise sealing of the compression chamber and stable thermal management during operation. Equivalent to OE Cummins 3948842S1.

Product identifiers
EAN Code8699031024127
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Compatible OEM Codes

  • WABCO
    • 911 154 520 0 S1
    • 911 154 519 0 S1
    • 911 154 511 0 S1
    • 911 154 510 0 S1
    • 911 154 509 0 S1
  • CUMMINS
    • 3976362 S1
    • 3949095 S1
    • 3948842 S1
    • 3944460 S1
    • 3936808 S1

Description

What does a cylinder head do?

A compressor cylinder head is a cast service component that sits on top of an air brake compressor's cylinder block and seals the compression chamber from above. This component is essential for maintaining the pressure integrity required for reliable pneumatic braking systems.

Compatibility and function

This cylinder head is compatible with Cummins systems. It serves as a critical part of the compressor assembly, housing the seats for inlet and discharge valves, internal air passages, and necessary cooling cavities to govern air output.

Maintenance and installation

When performing maintenance, technicians should verify the compressor architecture to ensure correct fitment. This part is designed to facilitate a complete rebuild of the compressor unit in place, providing a cost-effective solution for workshop technicians compared to replacing the entire assembly.

Selection guidance

Consult your authorized distributor to ensure this part matches the specific requirements of your air brake system.

OE cross-reference

25 08 11 (Compressor Cylinder Head) is the equivalent of the Cummins OE number. This part directly replaces Cummins OE number 3948842S1.

Other OEMs

CUMMINS

  • 3976362 S1
  • 3949095 S1
  • 3948842 S1
  • 3944460 S1
  • 3936808 S1

WABCO

  • 9111545200S1
  • 9111545190S1
  • 9111545110S1
  • 9111545100S1
  • 9111545090S1
  • 911 154 520 0 S1
  • 911 154 519 0 S1
  • 911 154 511 0 S1
  • 911 154 510 0 S1
  • 911 154 509 0 S1

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
CUMMINS
WABCO

FAQ

What is the function of a compressor cylinder head?
The cylinder head seals the compression chamber from above and houses the valve seats and internal air passages, directly governing air output and temperature.
Can this part be used for compressor rebuilding?
Yes, this component allows workshop technicians to rebuild an air brake compressor in place rather than replacing the entire unit.
How do I ensure correct fitment for my compressor?
Since different engine options can change compressor architecture, selection should be based on the specific compressor reference number.
What types of cylinder heads are available in this category?
The category includes single-cylinder, twin-cylinder, air-cooled, water-cooled, and heads with unloader ports depending on the system design.
What are the OE reference numbers of this part?
25 08 11 directly replaces Cummins OE number 3948842S1.