Skip to content
25 11 50 Compressor Cylinder Head, Air Brake Compressors

1335 Views Updated

25 11 50 Compatible Cummins Knorr-Bremse Cylinder Head

25 11 50

Summary

This high-strength cylinder head is a critical service component designed for air brake compressors. It is compatible with Cummins and Knorr-Bremse systems, providing a reliable solution for rebuilding compressor units in heavy commercial vehicle applications. Equivalent to OE Cummins 3957724S1 and Knorr-Bremse LK3839S1.

Product identifiers
EAN Code8699031044569
Ready to Order
Get Information
Share
WhatsApp Facebook X LinkedIn

Compatible OEM Codes

  • CUMMINS
    • 4898367 S1
    • 4898083 S1
    • 3964688 S1
    • 3964687 S1
    • 3957725 S1
    • 3957724 S1
  • KNORR-BREMSE
    • LK3846 S1
    • LK3839 S1

Description

What does a cylinder head do?

This cylinder head serves as the essential cast component situated atop the air brake compressor cylinder block, sealing the compression chamber from above. It functions by housing the inlet and discharge valve seats, internal air passages, and necessary cooling cavities to regulate air output and operating temperatures.

System compatibility

The component is engineered to be compatible with Cummins and Knorr-Bremse systems. This allows workshop technicians to rebuild existing compressor units in place, extending the service life of the pneumatic system without the need to replace the entire assembly.

Installation and maintenance

When performing installation, ensure all valve seats and sealing surfaces are clean to maintain proper compression. This component is specifically designed to withstand high-pressure cycles within heavy commercial vehicle air systems. Consult your authorized distributor for precise fitment details.

Selection guidance

Selecting the correct head is vital for maintaining stable air pressure and managing thermal loads during operation.

OE cross-reference

25 11 50 (Compressor Cylinder Head) is the equivalent of the Cummins and Knorr-Bremse OE numbers. This part directly replaces Cummins OE numbers 3957724S1, 3957725S1, 3964687S1, 3964688S1, 4898083S1, 4898367S1. It also replaces Knorr-Bremse OE numbers LK3839S1, LK3846S1.

Other OEMs

CUMMINS

  • 4898367 S1
  • 4898083 S1
  • 3964688 S1
  • 3964687 S1
  • 3957725 S1
  • 3957724 S1

KNORR-BREMSE

  • LK3846 S1
  • LK3839 S1

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
CUMMINS
KNORR-BREMSE

FAQ

What is the function of a compressor cylinder head?
The cylinder head seals the compression chamber and houses the valve seats and air passages, directly governing the air output and temperature.
Can this part be used to rebuild an existing compressor?
Yes, this component allows workshop technicians to rebuild a compressor in place rather than replacing the entire unit.
Which systems is this component compatible with?
This part is designed to be compatible with Cummins and Knorr-Bremse systems used in heavy commercial vehicles.
How should I ensure correct fitment during installation?
Always check the specific compressor architecture and ensure all valve seats are clean to maintain proper sealing under high pressure.
What are the OE reference numbers of this part?
25 11 50 directly replaces Cummins OE numbers 3957724S1, 3957725S1, 3964687S1, 3964688S1, 4898083S1, 4898367S1. It also replaces Knorr-Bremse OE numbers LK3839S1, LK3846S1.