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Summary of Contents for Knorr-Bremse SKP
- Page 1 Doc. No. Y276710 (EN - Rev. 001) May 2020 SERVICE MANUAL ELECTRICAL SCREW COMPRESSOR...
- Page 2 The information contained in this document is intended for the exclusive use of trained persons within the commercial vehicle industry, and must not be passed on to any third party. All recommendations regarding products and their servicing or usage are with reference to Knorr-Bremse products and should not be considered applicable to products from other manufacturers.
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Page 3: Table Of Contents
» Service Manual - Electrical Screw Compressor CONTENTS CONTENTS ............. . 3 SAFETY AND ENVIRONMENT GUIDELINES . -
Page 4: Safety And Environment Guidelines
The use of impact screwdrivers or impact wrenches in conjunction with Knorr-Bremse service tools for air disc brakes is not permitted. The service tools are not designed for such use. It is likely that the tools or the vehicle will be damaged and there is a serious risk of injury – see Caution above. - Page 5 For more information about arrangements for waste equipment disposal please contact your Knorr-Bremse distributor or local Knorr-Bremse representative.
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Page 6: General Information
Technical changes KNORR-BREMSE reserves the right to change the unit or this document at any time without giving special notice. Target group for this document This document is intended for use by trained service technicians who:... -
Page 7: Notes And Warning Messages
» Service Manual - Electrical Screw Compressor GENERAL INFORMATION Notes and warning messages DANGER Failure to comply with these instructions will lead to irreversible personal injuries which may have fatal consequences. WARNING Failure to comply with these instructions may lead to irreversible physical injuries which may have fatal consequences. -
Page 8: Basic Safety Information
This document is valid for units with type designations: SKP. NOTE If the unit cannot be uniquely identified, e. g. because the name plate is illegible or missing, please... -
Page 9: Operator's Commitment To Due Care
2.2.4 Spares and wearing parts The operator shall ensure that none other than genuine KNORR-BREMSE parts or KNORR-BREMSE approved spares or wearing parts are used. The installation of spares other than approved may impair the safety and reliability of the given unit and overall system and invalidates any warranty on the part of KNORR-BREMSE. -
Page 10: Technical Description
» Y276710 – (EN - REV. 001) | May 2020 TECHNICAL DESCRIPTION The model SKP compressor is used to generate and supply compressed air in commercial vehicles. Fig. 1 – Screw compressor unit Packaging: Nominal dimensions in mm (L x W x H) : 364 x 280 x 321... -
Page 11: Installation And Removal
» Service Manual - Electrical Screw Compressor INSTALLATION AND REMOVAL 4.1 Installation CAUTION Beware of contaminating the pneumatic system! Device and/or system functions will fail. Keep out dirt during installation. If necessary, blow out the pipes of the pneumatic system. CAUTION Beware of disregarding the installation instructions! Safety will be diminished and functions restricted. -
Page 12: Handling
» Y276710 – (EN - REV. 001) | May 2020 INSTALLATION AND REMOVAL 4.1.1 Handling The device is fitted with a lifting eye. This lifting eye is not intended to lift the complete assembly with e-motor. Fig. 2 – Lifting Eye... -
Page 13: Disconnect The Compressor
» Service Manual - Electrical Screw Compressor INSTALLATION AND REMOVAL 4.1.2 Disconnect the compressor WARNING Beware of electric shock! Danger of physical injuries that may have fatal consequences. Before starting work, switch off the power supply to the electrical connection and prevent it from being restored without due authorization. -
Page 14: Air Connection
» Y276710 – (EN - REV. 001) | May 2020 INSTALLATION AND REMOVAL 4.1.4 Air connection Once mechanically installed, the unit must be connected to the air, water and electrical systems. See below the location of these different connections. Air in Air out Fig. -
Page 15: Coolant Connection
» Service Manual - Electrical Screw Compressor INSTALLATION AND REMOVAL 4.1.5 Coolant connection Liquid coolant according vehicle manufacturer specification (mixture of glycol + water). Water in / Out Fig. 6 – Coolant connection dimensions Fig. 7 – Coolant connection locations... -
Page 16: Electrical Connection
» Y276710 – (EN - REV. 001) | May 2020 INSTALLATION AND REMOVAL 4.1.6 Electrical connection Fig. 8 – Electrical connection location TE Connectivity 1170373-1 Temperature control Temperature control + 24V Ground Oil level signal Not used The wiring harness must be connected for compressor operation. The compressor is equipped with 2 electrical switches: max temperature &... -
Page 17: Removal
» Service Manual - Electrical Screw Compressor INSTALLATION AND REMOVAL Removal WARNING Pneumatic system is under high pressure. Particles ejected, for instance, will cause severe eye injuries. Observe the safety regulations for pneumatic systems. Prior to removal, exhaust the pressure from the (sub)system. CAUTION Beware of contaminating the pneumatic system! Device and/or system functions will fail. -
Page 18: Maintenance
» Y276710 – (EN - REV. 001) | May 2020 MAINTENANCE Maintenance is basically subdivided into: Inspection Servicing Repair Maintenance must be performed every 1500 operating hours or at least once a year: Changing oil Replacing the coalescing filter Compressor visual check to track any potential issue (leakages, shocks…) Replacing the vehicle air filter, according manufacturer requirements Operating hours are defined as when the compressor is running. -
Page 19: Compressor Design
» Service Manual - Electrical Screw Compressor MAINTENANCE Compressor design A: Filling plug Drainage plug (gravity) Drainage plug (vacuum) D: Coalescing filter Air filter (option) Temperature switch G: Oil level switch H: Electrical connector Max pressure valve Min pressure valve M: Oil Cooler Electrical heater (option) -
Page 20: Inspection
» Y276710 – (EN - REV. 001) | May 2020 MAINTENANCE Inspection WARNING Beware of electric shock! Danger of physical injuries that may have fatal consequences. Before starting work, switch off the power supply to the electrical connection and prevent it from being restored without due authorization. -
Page 21: Oil Level Check
» Service Manual - Electrical Screw Compressor MAINTENANCE 5.2.1 Oil level check The compressor is equipped with an electrical oil level switch. When the minimum level is reached a warning signal is sent to vehicle system. When the vehicle system indicates that the minimum oil level is reached, then top up the oil level. Oil level switch check (connection see 4.1.6): After oil drainage: - Connect pin 3 to +24V, pin 4 to ground... -
Page 22: Servicing
» Y276710 – (EN - REV. 001) | May 2020 MAINTENANCE Max Oil level Fig. 9 – Oil level check Servicing WARNING Beware of electric shock! Danger of physical injuries that may have fatal consequences. Before starting work, switch off the power supply to the electrical connection and prevent it from being restored without due authorization. -
Page 23: Oil Drainage
Hot oil! Danger of burns. Wear protective gloves to drain off the oil. NOTE Genuine KNORR-BREMSE spares must always be used for maintenance. 5.3.1 Oil drainage WARNING Possibility of pressure in the compressor housing! Particles ejected, for instance, will cause severe eye injuries. -
Page 24: Exchanging The Coalescing Filter
» Y276710 – (EN - REV. 001) | May 2020 MAINTENANCE CAUTION Hot oil! Danger of burns. Wear protective gloves to drain off the oil. Unscrew the drainage plug B (see 5.1), drain off all the oil. Arrange for its disposal in accordance with national regulations. Screw in the drainage plug B with a new sealing washer. -
Page 25: Repair
To displace air that has accumulated inside the compressor, start the compressor until oil cooler M (see 5.1) is hot. Top up the oil (see Section 5.1.2). Fig. 10 – Coalescing filter Repair If the unit develops a malfunction that cannot be corrected by the measures described in Section 5.2, please contact KNORR-BREMSE. -
Page 26: Troubleshooting
See problem: „Temperature switch F turns off the turned off the e-motor e-motor“. Oil temperature is below the Check the oil grade. Contact KNORR-BREMSE. allowed limit Note the oil type plate above the oil filler plug A. Remove air purge pipe – be careful of remaining pressure. - Page 27 Cause Action section Stop operation. If this rule is ignored, warranty Ambient temperature lower will be forfeited. KNORR-BREMSE offers special than the design rating Motor compressor set doesn’t solutions for very low temperatures. reach nominal speed Remove the compressor set and send to Compressor defective KNORR-BREMSE for repair.
- Page 28 Oil rejection from inlet port E Pressure release valve is Exchange pressure release valve. defective Noise located at coupling area during start/ stop of Exchange coupling star. compressor Excessive noise level Remove the compressor set and send to Compressor defective KNORR-BREMSE for repair.
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Page 29: Disposal
This would mean unnecessary and legally punishable harm to the environment. Observe the officially applicable waste disposal regulations. KNORR-BREMSE units consist essentially of metal, rubber and plastic parts. Electronic components, auxiliary products and working substances are used as well. All materials must be separated as far as possible from one another for the purposes of proper disposal. The national... - Page 30 » Y276710 – (EN - REV. 001) | May 2020 NOTES...
- Page 31 » Service Manual - Electrical Screw Compressor NOTES...
- Page 32 The information contained herein is subject to alteration without notice and therefore may not be the latest release. Please check our website www.knorr-bremseCVS.com for the latest update or contact your local Knorr-Bremse representative. The figurative mark “K” and the trademarks KNORR and KNORR-BREMSE are registered in the name of Knorr-Bremse AG. Additional terms and conditions apply; please refer to our website knorr-bremseCVS.com for full Disclaimer.
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