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911 154 509 0 S1 Compressor Cylinder Head for WABCO Systems
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911 154 509 0 S1 WABCO Compatible Compressor Cylinder Head

25 08 11

Summary

This compressor cylinder head is a critical component for air brake compressor systems. Designed to sit atop the cylinder block, it seals the compression chamber and houses the valve seats. Compatible with WABCO systems, this heavy-duty grade part ensures reliable air output and temperature regulation in commercial applications. Equivalent to OE WABCO 9111545090S1.

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 compressor cylinder head do?

This compressor cylinder head functions as the essential sealing component located at the top of an air brake compressor's cylinder block. It serves to seal the compression chamber from above, allowing workshop technicians to perform precise rebuilds of the compressor unit rather than requiring a full replacement. By housing the inlet and discharge valve seats, internal air passages, and cooling cavities, this component directly governs both the air output volume and the operational temperature of the system.

Compatibility and system fitment

This specific part is compatible with WABCO systems and is designed to meet the rigorous demands of heavy commercial vehicle braking systems. It is engineered to maintain structural integrity under high-pressure cycles, ensuring consistent pneumatic performance for fleet maintenance and repair operations.

Installation and maintenance guidance

When performing maintenance, technicians should verify the specific architecture of the compressor to ensure correct fitment. Depending on the design, these heads may feature different configurations such as single-cylinder or twin-cylinder layouts, or include specific unloader ports for governor signal reception. Always check the compressor's own reference number to ensure exact match during installation.

Troubleshooting and selection

Regular inspection of the cylinder head and its associated valve seats can prevent air leaks and maintain optimal braking pressure throughout the service life of the compressor.

OE cross-reference

25 08 11 (Compressor Cylinder Head) is the equivalent of the WABCO OE number. This part directly replaces WABCO OE number 9111545090S1.

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 sits on top of the compressor block to seal the compression chamber. It contains the valve seats and air passages necessary for generating pneumatic pressure.
Can this part be used for any air brake compressor?
Selection must be based on the specific architecture of the unit. Different heads are designed for single-cylinder, twin-cylinder, or specific water-cooled configurations.
How can I ensure correct compatibility?
It is essential to match the part based on the compressor's own reference number rather than just the vehicle model to ensure perfect fitment.
What are common symptoms of a faulty cylinder head?
Technicians may notice irregular air output, overheating due to blocked cooling cavities, or air leaks from the compression chamber seals.
What are the OE reference numbers of this part?
25 08 11 directly replaces WABCO OE number 9111545090S1.