Knorr-Bremse SKP - User Manual

Questions and Answers

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Patricia Smith MDAug 21, 2025
Why is the unloader valve K popping on my Knorr-Bremse SKP?
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  smithtracyAug 21, 2025
  The unloader valve K on your Knorr-Bremse compressor might be popping due to several reasons: * The unloader valve itself may be defective. In this case, exchange the unloader valve. * The minimum pressure valve L could be sticking. Exchange the min pressure valve. * The coalescing filter D may be defective. Exchange the coalescing filter. * The air system might be defective, such as a clogged delivery line. Check the air system. If none of these steps resolve the issue, the compressor itself may be defective and should be sent to Knorr-Bremse for repair.
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Daniel MullinsAug 27, 2025
How to troubleshoot if my Knorr-Bremse SKP motor doesn’t reach nominal speed?
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  Sarah CortezAug 28, 2025
  If your Knorr-Bremse compressor motor set isn’t reaching nominal speed, consider these potential causes: * Ambient temperature lower than the design rating: Stop operation. Note that ignoring this rule will forfeit the warranty. KNORR-BREMSE offers special solutions for very low temperatures. * The compressor may be defective: Remove the compressor set and send it to KNORR-BREMSE for repair.
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Pamela AustinNov 4, 2025
Why does temperature switch F turn off the e-motor in my Knorr-Bremse SKP?
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  Tiffany GouldNov 4, 2025
  The temperature switch F in your Knorr-Bremse compressor may be turning off the e-motor due to several reasons: * A defective or disconnected wiring harness. Inspect the wiring harness after cooling down (Pin 1 & 2), and replace it if it's defective. * Low oil level in the compressor housing. Top up the oil and inspect the oil level sensor. * High oil temperature, possibly caused by a clogged oil cooler. Replace the oil cooler. * A defective coalescing filter D. Replace the coalescing filter. * A clogged oil return circuit. Replace the oil trap support. * High ambient temperature. Ensure sufficient ventilation in the compressor enclosure. * Insufficient or excessively high coolant temperature. Check the vehicle coolant circuit (coolant liquid level, air in the circuit, liqu...
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James ReynoldsNov 11, 2025
What to do if my Knorr-Bremse SKP has abnormally high oil consumption?
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  Megan BrownNov 11, 2025
  If your Knorr-Bremse compressor is experiencing abnormally high oil consumption, consider the following potential causes and solutions: * Oil leakage at the flange breathing hole or between the flange and main housing: Replace the flange, including the O-ring. * Oil leakage at plugs or sensors: Replace the sealing washer and top up the oil. * Oil leakage at the unloader valve thread: Disassemble the unloader valve, clean the thread, and reassemble it with tightening liquid. * Coalescing filter D is saturated: Replace the coalescing filter. * Inlet check valve is defective: Exchange inlet check valve gaskets. * Pressure release valve is defective: Exchange pressure release valve. * Noise located at coupling area during start/ stop of compressor: Exchange coupling star. Also,...