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LP3934 S1 Knorr-Bremse Compatible Compressor Cylinder Head

12 11 50

Summary

This compressor cylinder head is a heavy-duty component designed for air brake compressors. It is compatible with Knorr-Bremse systems to ensure precise compression chamber sealing and optimal thermal management during operation. Equivalent to OE Knorr-Bremse LP3934S1.

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 compressor cylinder head do?

This compressor cylinder head serves as the critical cast component positioned atop the air brake compressor cylinder block. Its primary function is to seal the compression chamber from above, allowing workshop technicians to rebuild a compressor in place rather than replacing the entire unit. By housing the inlet and discharge valve seats, internal air passages, and cooling cavities, this part directly governs both air output and operating temperatures.

System compatibility and fitment

This component is designed for use in heavy commercial vehicle air brake systems. It is compatible with Knorr-Bremse systems and other professional pneumatic architectures used in heavy-duty applications. Due to varying engine options and compressor architectures, always verify compatibility based on the specific compressor reference.

Installation and maintenance guidance

When performing maintenance, technicians should inspect the valve seats and cooling channels for any signs of wear or blockage. Proper installation ensures the integrity of the compression chamber and prevents pressure loss within the pneumatic system. Check the compatibility list before installation to ensure correct fitment.

Selection and troubleshooting

Selecting the correct cylinder head is vital for maintaining stable air pressure and preventing overheating in high-load environments.

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 LP3934S1.

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/discharge valve seats and internal air passages to regulate 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 can I ensure this head fits my compressor?
Since different engine options may require different architectures, you must verify compatibility based on your specific compressor reference.
What symptoms indicate a faulty cylinder head?
Issues such as irregular air output, overheating, or pressure loss within the pneumatic system may indicate wear in the head or valve seats.
What are the OE reference numbers of this part?
12 11 50 directly replaces Knorr-Bremse OE number LP3934S1.