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308.03.0002.04 Air Processing Unit Repair Kit, Brake System
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308.03.0002.04 Knorr-Bremse Compatible Air Processing Unit Repair Kit

308.03.0002.04

Summary

This air processing unit repair kit is designed for the maintenance of air treatment units in heavy commercial vehicle brake systems. It is compatible with Knorr-Bremse systems to ensure reliable air regulation and distribution. Equivalent to OE Knorr-Bremse EL2101S4.

Product identifiers
EAN Code8683457066120
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Compatible OEM Codes

  • KNORR-BREMSE
    • K250194 S4
    • K132981 S4
    • EL2901 S4
    • EL2253 S4
    • EL2101 S4

Description

What does an air processing unit repair kit do?

This air processing unit repair kit serves as a vital service solution for the in-place overhaul of units responsible for drying, regulating, and distributing compressed air within a heavy commercial vehicle's brake system. By providing the necessary components to renew heavily loaded parts, this kit helps maintain system integrity without the necessity of a full unit replacement.

Compatibility and application

These kits are engineered to be compatible with Knorr-Bremse systems, ensuring that the air treatment process remains efficient. Proper installation involves verifying surface cleanliness and using the correct lubricant to ensure long-term operational stability within the pneumatic circuit.

Maintenance and installation guidance

Maintenance technicians should identify the correct kit based on whether the requirement is for a complete overhaul or a specific sealing group service. For units experiencing pressure drift or water accumulation, specialized components like regulator pistons or purge valve parts are essential for restoring optimal performance.

Troubleshooting and selection

Always refer to the vehicle manufacturer's service manual for specific tightening torques and lubrication requirements during installation. Check the compatibility list for precise fitment details.

OE cross-reference

308.03.0002.04 (Air Processing Unit Repair Kit) is the equivalent of the Knorr-Bremse OE numbers. This part directly replaces Knorr-Bremse OE numbers EL2101S4, EL2253S4, EL2901S4, K132981S4, K250194S4.

Other OEMs

KNORR-BREMSE

  • K250194 S4
  • K132981 S4
  • EL2901 S4
  • EL2253 S4
  • EL2101 S4

Compatible Vehicles

Compatible Vehicles
BrandModelModel TypeEngine
KNORR-BREMSE

FAQ

What is the purpose of an air processing unit repair kit?
It is a service set used to overhaul units that dry, regulate, and distribute compressed air in heavy commercial vehicle brake systems.
How do I know which kit is required for my system?
Selection depends on whether you need a complete overhaul including all seals and springs, or a specific gasket and O-ring kit for sealing groups.
Can I use this kit if my air regulator is drifting?
Yes, specific pressure regulator repair kits are designed to include the regulator piston, spring, and seals to fix pressure threshold issues.
Is this kit suitable for repairing water accumulation issues?
For issues where water collects in the system, a dryer section service kit containing cartridge gaskets and purge valve parts is recommended.
What are the OE reference numbers of this part?
308.03.0002.04 directly replaces Knorr-Bremse OE numbers EL2101S4, EL2253S4, EL2901S4, K132981S4, K250194S4.