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LK3809 S1 Cylinder Head for Air Brake Compressors

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LK3809 S1 Knorr-Bremse Compatible Cylinder Head

12 11 50

Summary

This compressor cylinder head is a heavy-duty component designed to seal the compression chamber from above. It is compatible with Knorr-Bremse systems and serves as a critical service part for rebuilding air brake compressors in heavy commercial vehicles. Equivalent to OE Knorr-Bremse LK3809S1.

Product identifiers
EAN Code8699031021188
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Compatible OEM Codes

  • KNORR-BREMSE
    • LP3943 S1
    • LP3940 S1
    • LP3934 S1
    • LP3928 S1
    • LP3830 S1
    • LK3832 S1
    • LK3826 S1
    • LK3809 S1
    • LK3808 S1
    • LK3806 S1
    • LK3805 S1
    • LK3802 S1
  • MAN
    • 51.54101-7204 S1
    • 51.54101-7201 S1
    • 51.54101-7195 S1
    • 51.54101-7189 S1
    • 51.54101-7150 S1

Description

What does a cylinder head do?

This compressor cylinder head acts as the cast service component that sits atop an air brake compressor's cylinder block. By sealing the compression chamber from above, it allows workshop technicians to rebuild a compressor in place rather than replacing the entire unit. The component contains the seats for the inlet and discharge valves, internal air passages, and cooling cavities, directly governing both air output and running temperature.

Compatibility and application

This part is compatible with Knorr-Bremse systems. It is specifically designed to meet the rigorous demands of heavy commercial vehicle air brake systems, ensuring stable performance under high pressure.

Installation and maintenance

When performing maintenance, technicians should verify the specific compressor architecture to ensure correct fitment. Depending on the unit, this component may feature cooling fins for air-cooled designs or jacket channels for water-cooled configurations. It is vital to check the port locations and valve seat condition during installation to ensure optimal sealing and prevent pressure loss.

Selection guidance

Consult your authorized distributor to ensure this cylinder head matches your specific compressor assembly requirements.

OE cross-reference

12 11 50 (Compressor Cylinder Head) is the equivalent of the Knorr-Bremse OE number. This part directly replaces Knorr-Bremse OE number LK3809S1.

Other OEMs

KNORR-BREMSE

  • LP3943 S1
  • LP3940 S1
  • LP3934 S1
  • LP3928 S1
  • LP3830 S1
  • LK3832 S1
  • LK3826 S1
  • LK3809 S1
  • LK3808 S1
  • LK3806 S1
  • LK3805 S1
  • LK3802 S1

MAN

  • 51541017204S1
  • 51541017201S1
  • 51541017195S1
  • 51541017189S1
  • 51541017150S1
  • 51.54101-7204 S1
  • 51.54101-7201 S1
  • 51.54101-7195 S1
  • 51.54101-7189 S1
  • 51.54101-7150 S1

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
KNORR-BREMSE
MAN

FAQ

What is the function of a compressor cylinder head?
The cylinder head seals the compression chamber from above and houses the inlet and discharge valve seats, which are essential for managing air output.
Can this part be used to rebuild an existing compressor?
Yes, this component allows workshop technicians to rebuild an air brake compressor in place instead of replacing the entire unit.
How do I know if this head is compatible with my system?
Selection should be based on the specific compressor architecture and reference numbers to ensure it matches your engine or vehicle application.
What should I check during installation?
Technicians should verify port sizes, valve seat integrity, and whether the unit requires an unloader port or specific cooling cavities.
What are the OE reference numbers of this part?
12 11 50 directly replaces Knorr-Bremse OE number LK3809S1.