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Bosch Rexroth H-4WEH...XE Series Operating Instructions Manual

4/2 and 4/3 directional valves, internally pilot-operated, externally pilot-operated
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4/2 and 4/3 directional valves,
internally pilot-operated,
externally pilot-operated
(Area of application according to the explosion protection directive 2014/34/EU: II 2G)
Type H-4WEH...XE...
Operating instructions
RE 24751-XE-B/04.16
Replaces: 09.13
English

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  Summary of Contents for Bosch Rexroth H-4WEH...XE Series

  • Page 1 4/2 and 4/3 directional valves, internally pilot-operated, externally pilot-operated (Area of application according to the explosion protection directive 2014/34/EU: II 2G) Type H-4WEH...XE... Operating instructions Replaces: 09.13 RE 24751-XE-B/04.16 English...
  • Page 2 © This document, as well as the data, specifications and other information set forth in it, are the exclusive property of Bosch Rexroth AG. It may not be reproduced or given to third parties without its consent. The cover shows an example configuration.
  • Page 3: Table Of Contents

    10.2 Inspection and maintenance 10.3 Maintenance schedule 10.4 Repair 10.5 Rectifying external leakages 10.6 Spare parts Disassembly and removal Disposal 12.1 Environmental protection 12.2 Return to Bosch Rexroth AG 12.3 Packaging 12.4 Materials used RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 4 4/52 12.5 Recycling Extension and modification Troubleshooting 14.1 How to proceed for troubleshooting Technical data Appendix 16.1 List of addresses Declaration of conformity Alphabetical index Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
  • Page 5: About This Documentation

    "General information on damage to property and damage to product" and whenever a sequence of actions or instructions is explained which bear the danger of personal injury or damage to property. The hazard avoidance measures described must be observed. RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 6 The numbers indicate that the actions must be carried out one after the other. 1.3.3 Abbreviations The following abbreviations are used in this documentation: Table 4: Abbreviations Abbreviation Meaning ATEX EU Explosion Protection Directive (Atmosphère explosible) European Standard International Organization for Standardization Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
  • Page 7: Safety Instructions

    EU explosion protection directive 2014/34/EU. According to directive 2014/34/EU, the device group, category and temperature class to which the valve corresponds are indicated in the "Area of application" section of the data sheet. RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 8: Improper Use

    Changes and/or modification at the valve are not admissible, see chapter 13 "Extension and modification". Bosch Rexroth AG does not assume any liability for damage caused by improper use. The user assumes all risks involved with improper use. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
  • Page 9: Qualification Of Personnel

    • Understanding of the additional importance of work permit systems and safe electrical separation regarding explosion protection Bosch Rexroth offers measures supporting training in specific fields. You can find an overview of the training contents on the Internet at: http://www.boschrexroth.de/didactic...
  • Page 10: General Safety Instructions

    • Do not commission the product until you can be sure that the end product (for example a machine or system) where the Rexroth product is installed complies with the country-specific provisions, safety regulations and standards of the application. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
  • Page 11: Product-Specific Safety Instructions

    ▶ Before working at the valve, ensure that the hydraulic system is depressurized and the electrical control is de-energized. ▶ Completely unload the pressure at machines and systems before working at the valve. RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 12 ▶ Exchange valves with corrosion damage at an early stage. ▶ Check the surface protection at the valve and the valve mounting screws at regular intervals. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
  • Page 13: Notices On The Valve Use

    The values for the residual voltage peak depend on the valve solenoid used, see the "Data sheet 24751-XE". RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 14: Personal Protective Equipment

    The machine end-user is obliged to check in the order confirmation whether the supplied valve complies with the required category and the corresponding zone. The machine end-user of the Bosch Rexroth valve is responsible that • the valve is only used according to the intended use as defined in these operating instructions.
  • Page 15: General Information On Damage To Property And Damage To Product

    Hydraulic fluid harmful to the environment! Leaking hydraulic fluid leads to environmental pollution. ▶ Immediately remedy possible leakage. ▶ Dispose of the hydraulic fluid in accordance with the currently applicable national regulations in your country. RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 16: Scope Of Delivery

    Check the scope of delivery for possible transport damage, see chapter 6 "Transport and storage". In case of complaints, please contact Bosch Rexroth AG, see chapter 16.1 "List of addresses". Accessories such as valve subplates and valve mounting screws are not included in the scope of delivery and must be ordered separately.
  • Page 17: Product Identification

    Manufacturer's factory number e.g. 7081 Date of manufacture (year and week) e.g. FD: 03w01 Maximum operating pressure e.g. pmax 350 bar Ambient temperature range –20 °C ≤ Ta ≤ +60 °C Graphic Hydraulic symbol according to ISO 1219 RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 18 Explosion protection mark II 2G c T4X Mark according to the explosion protection directive 2014/34/EU and mark for the type of protection of the mechanical part according to EN 13463-5 Rexroth QR code QR code Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
  • Page 19 Hydac data matrix code Dependent on valve sizes and the configuration of the solenoid coils, higher ambient temperatures up to 70 °C are admissible. Also observe the "Special conditions for safe use" in "Data sheet 24751-XE". RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 20 Potentially explosive atmospheres in which an explosive atmosphere due to blown up dust (=device group II) does not normally occur or only rarely or for a short time. Corresponds to zone 22 according to directive 1999/92/EC. Standard level of safety. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
  • Page 21 Table 9: Temperature classes for device group II Temperature class Maximum surface temperature 450 °C 300 °C 200 °C 135 °C 100 °C 85 °C RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 22: Transport And Storage

    Danger of cut injuries! ▶ Wear suitable protective equipment when transporting the valve. More information regarding transport is available from Bosch Rexroth, see chapter 16.1 "List of addresses". Notify your responsible sales contact person about any transport damage within one week. The addresses of the sales subsidiaries can be found on the Internet at: http:/www.boschrexroth.com/adressen...
  • Page 23: Storing The Hydraulic Valve

    Pack the valve with a desiccant air-tightly in corrosion protection film. Store the valve protected against impacts. ▶ In each case, please observe any applicable provisions and laws regarding the handling of substances hazardous to water or to health. RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 24: Assembly

    It is imperative to provide for absolute cleanliness. The valve must be protected from dirt during installation. Contamination of the hydraulic fluid may considerably reduce the life cycle of the valve. ▶ Observe the installation position specified in "Data sheet 24751-XE". Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
  • Page 25: Before The Assembly

    ISO 4762-M6x60-10.9- 0.09...0.14 flZn-240h-L H-4WEH25... ISO 4762-M12x60-10.9- 0.09...0.14 R913000121 flZn-240h-L H-4WEH32... ISO 4762-M20x80-10.9- 0.09...0.14 R901035246 flZn-240h-L Subplates For subplates with dimensions for valves with porting pattern according to ISO 4401, refer to "Data sheet 45100". RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 26: Assembling The Valve

    Consequently, persons may slip or fall. ▶ Only remove the protective caps of valve directly before the assembly. ▶ After the disassembly, provide the bores containing the hydraulic fluid with suitable closing elements. ▶ Immediately remove leaked hydraulic fluid. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
  • Page 27 58.0 Nm ± 10% M6 x 60 - 10.9 12.5 Nm ± 10 % NG25 M12 x 60 - 10.9 100.0 Nm ± 10% NG32 M20 x 60 - 10.9 340.0 Nm ± 10% RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 28 Make sure that all pipes and hose lines and every combination of connection pieces, couplings or connection points with hoses or pipes are checked for their operational safety by a person with appropriate knowledge and experience. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
  • Page 29 ▶ Only use connection lines without shielding or armoring. For information on the prescribed pre-fuse, refer to "Data sheet 24751-XE". RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 30 15 cm of the cable bushing. Connection of the valve solenoid is polarity-independent. Valve solenoids for connection to alternating voltage have a bridge rectifier which is integrated in the vale solenoid. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
  • Page 31 Remove the outer sheath of the connection line and the insulation of the individual conductors. Press the wire end ferrule on the individual conductors. For the stripping lengths, refer to fig. 5 and table 14. Fig. 5: Stripping lengths RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 32 Tightening torque of the double nipple (2): 8...10 Nm Assemble the plug screw. Tightening torque of the plug screw 7...9 Nm Assemble the solenoid coil (see chapter 7.7.4 "Rotating the solenoid coil by ± 90°"). Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
  • Page 33 Assemble the O-ring onto the pole tube and slide it forward up to the solenoid coil. Re-tighten the mounting nut of the valve solenoid (hexagon nut, wrench size 32, tightening torque 4 + 1 Nm). RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 34: Commissioning

    Condensed water may form inside the terminal box and cause a short-circuit! ▶ Allow the valve to acclimatize for some hours prior to commissioning as the electronics might be damaged by the generation of condensed water. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
  • Page 35 For order details for seal kits, please refer to chapter 10.6 "Spare parts". Valve-specific internal leakage may occur but does not have any influence on the functionality of the valve. RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 36 Fig. 7: Setting the switching time Remove the protective cap (wrench size 20) (1). Loosen the lock nut (3) (wrench size 10). Change the switching time by rotating the set screw (internal hexagon, size 5) (2). Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
  • Page 37: Operation

    Changing the settings at the valve is not admissible. For information on the operation, please refer to the operating instructions for the hydraulic system into which the valve is installed. If errors occur, refer to chapter 14 "Troubleshooting". RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 38: Operating The Manual Override (Only Relevant For Type H-4Weh./.Nxe.)

    The manual override is only intended for manual operation. It is not suitable for frequently recurring manual operation. The manual override is located on the side of the valve solenoid facing away from the valve. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
  • Page 39: Maintenance And Repair

    The date of manufacture of the valve can be seen on the name plate, see chapter 5.1.1 "Information on the name plate and the valve solenoid housing". RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 40 The sealing elements are only intended for single use. Assemble the cover of the terminal box with the seal beneath it. Tighten the mounting screws with the spring washers diagonally, one after the other. Tightening torque of the cover screws: 1...1.1 Nm Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
  • Page 41: Maintenance Schedule

    10.3.1 Checking for leakage Check the valve for leakage. Early detection of hydraulic fluid loss may help you identify and remedy errors. Bosch Rexroth therefore recommends always keeping the valve and/or the system clean. 10.3.2 Checking for noise development Check the valve for noise development.
  • Page 42: Spare Parts

    Rexroth service. Bosch Rexroth AG Service Hydraulics Bürgermeister-Dr.-Nebel-Str. 8 97816 Lohr am Main Phone: +49 (0) 9352 - 40 50 60 spare.parts@boschrexroth.de For the addresses of our sales and service network, please refer to: www.boschrexroth.com/adressen Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
  • Page 43: Disassembly And Removal

    Close the valve connection surface using the protective plate supplied or protect it using equivalent packaging in order to avoid contamination and damage. Seal the subplate in order to avoid contamination. RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 44: Disposal

    The materials for disposable packaging are mostly cardboard, wood, and expanded polystyrene. They can be recycled without any problems. For ecological reasons, disposable packaging should not be used for returning products to Bosch Rexroth. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
  • Page 45: Materials Used

    45/52 12.4 Materials used Hydraulic components from Bosch Rexroth do not contain any hazardous materials that could be released during intended use. In the normal case, no negative effects on human beings and on the environment have to be expected.
  • Page 46: Troubleshooting

    If so: What were they? – Was the valve or machine used as intended? – How did the fault become apparent? ▶ Try to get a clear idea of the cause of error. Ask the direct (machine) operator. Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
  • Page 47: Technical Data

    15 Technical data For the technical data of your valve please refer to "Data sheet 24751-XE". RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 48: Appendix

    Zum Eisengießer 1 97816 Lohr am Main Germany Phone +49 (93 52) 18 - 0 Email info@boschrexroth.de The addresses of our sales and service network and sales organizations can be found at www.boschrexroth.com/adressen Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
  • Page 49: Declaration Of Conformity

    Declaration of conformity 49/52 17 Declaration of conformity RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 50: Alphabetical Index

    ▶ M ▶ U Maintenance schedule Unpacking Main valve Manual override ▶ V Modification Validity of the documentation Valve mounting screws ▶ n Valve use Name plate ▶ O Obligations of the machine end-user Operation Bosch Rexroth AG, H-4WEH...XE..., RE 24751-XE-B/04.16...
  • Page 51 Alphabetical index 51/52 RE 24751-XE-B/04.16, H-4WEH...XE..., Bosch Rexroth AG...
  • Page 52 Bosch Rexroth AG Zum Eisengießer 1 97816 Lohr am Main Germany Phone +49 9352 18-0 info@boschrexroth.de www.boschrexroth.com Subject to change without notice Printed in Germany RE 24751-XE-B/04.16...

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